diff --git a/anidb/src/main/kotlin/io/github/manamiproject/modb/anidb/AnidbAnimeConverter.kt b/anidb/src/main/kotlin/io/github/manamiproject/modb/anidb/AnidbAnimeConverter.kt
index 89ec3935..f814dbea 100644
--- a/anidb/src/main/kotlin/io/github/manamiproject/modb/anidb/AnidbAnimeConverter.kt
+++ b/anidb/src/main/kotlin/io/github/manamiproject/modb/anidb/AnidbAnimeConverter.kt
@@ -9,6 +9,7 @@ import io.github.manamiproject.modb.core.extensions.neitherNullNorBlank
 import io.github.manamiproject.modb.core.extensions.remove
 import io.github.manamiproject.modb.core.extractor.DataExtractor
 import io.github.manamiproject.modb.core.extractor.ExtractionResult
+import io.github.manamiproject.modb.core.extractor.extractLabelledLinks
 import io.github.manamiproject.modb.core.extractor.XmlDataExtractor
 import io.github.manamiproject.modb.core.anime.*
 import io.github.manamiproject.modb.core.anime.AnimeMedia.NO_PICTURE
@@ -53,7 +54,7 @@ public class AnidbAnimeConverter(
             "season" to "//tr[contains(@class, 'season')]//td[contains(@class, 'value')]/text()",
             "startDate" to "//tr[contains(@class, 'year')]//td[contains(@class, 'value')]//span[contains(@itemprop, 'startDate')]/@content",
             "datePublished" to "//tr[contains(@class, 'year')]//td[contains(@class, 'value')]//span[contains(@itemprop, 'datePublished')]/@content",
-            "relatedAnime" to "//div[contains(@class, 'directly_related')]//a/@href",
+            "relatedAnime" to "//div[contains(@class, 'directly_related')]//div[contains(@class, 'stripe')]/html()",
             "alternateNames" to "//label[contains(@itemprop, 'alternateName')]/text()",
             "synonymsList" to "//div[contains(@class, 'titles')]//tr[contains(@class, 'syn')]/td/text()",
             "shortNames" to "//div[contains(@class, 'titles')]//tr[contains(@class, 'short')]/td/text()",
@@ -171,17 +172,20 @@ public class AnidbAnimeConverter(
         return hashSetOf(metaDataProviderConfig.buildAnimeLink(id))
     }
 
-    private fun extractRelatedAnime(data: ExtractionResult): HashSet<URI> {
+    private suspend fun extractRelatedAnime(data: ExtractionResult): HashSet<RelatedAnime> {
         if (data.notFound("relatedAnime")) {
             return hashSetOf()
         }
 
-        return data.listNotNull<String>("relatedAnime")
-            .asSequence()
-            .filterNot { it.contains("relation") }
-            .map { it.remove("/anime/") }
-            .distinct()
-            .map { metaDataProviderConfig.buildAnimeLink(it) }
+        // <div class="g_bubble stripe"> ... <a href="/anime/405"> ... <div class="type">Sequel</div>
+        // Entries in "indirectly related" don't have a type.
+        return extractor.extractLabelledLinks(
+            snippets = data.listNotNull<String>("relatedAnime"),
+            labelSelector = "//div[@class='type']/text()",
+            linkSelector = "//a/@href",
+        ).flatMap { entry -> entry.links.map { it to entry.label } }
+            .filterNot { (link, _) -> link.contains("relation") }
+            .map { (link, label) -> RelatedAnime.of(metaDataProviderConfig.buildAnimeLink(link.remove("/anime/")), label) }
             .toHashSet()
     }
 
diff --git a/anidb/src/main/kotlin/io/github/manamiproject/modb/anidb/AnidbApiAnimeConverter.kt b/anidb/src/main/kotlin/io/github/manamiproject/modb/anidb/AnidbApiAnimeConverter.kt
index 73771c90..0d1f697d 100644
--- a/anidb/src/main/kotlin/io/github/manamiproject/modb/anidb/AnidbApiAnimeConverter.kt
+++ b/anidb/src/main/kotlin/io/github/manamiproject/modb/anidb/AnidbApiAnimeConverter.kt
@@ -17,6 +17,7 @@ import io.github.manamiproject.modb.core.extensions.EMPTY
 import io.github.manamiproject.modb.core.extensions.neitherNullNorBlank
 import io.github.manamiproject.modb.core.extractor.DataExtractor
 import io.github.manamiproject.modb.core.extractor.ExtractionResult
+import io.github.manamiproject.modb.core.extractor.extractLabelledLinks
 import io.github.manamiproject.modb.core.extractor.XmlDataExtractor
 import kotlinx.coroutines.withContext
 import java.net.URI
@@ -50,7 +51,7 @@ public class AnidbApiAnimeConverter(
             "mainTitle" to "//anime/titles/title[@type='main']/text()",
             "otherTitles" to "//anime/titles/title[@type!='main']/text()",
             "tags" to "//anime/tags/tag/name/text()",
-            "relatedAnime" to "//anime/relatedanime/anime/@id",
+            "relatedAnime" to "//anime/relatedanime/anime/html()",
             "episodeLengths" to "//anime/episodes/episode/length/text()",
             "score" to "//anime/ratings/permanent/text()",
         ))
@@ -169,13 +170,17 @@ public class AnidbApiAnimeConverter(
             .toHashSet()
     }
 
-    private fun extractRelatedAnime(data: ExtractionResult): HashSet<URI> {
+    private suspend fun extractRelatedAnime(data: ExtractionResult): HashSet<RelatedAnime> {
         if (data.notFound("relatedAnime")) {
             return hashSetOf()
         }
 
-        return data.listNotNull<String>("relatedAnime")
-            .map { metaDataProviderConfig.buildAnimeLink(it.trim()) }
+        // <anime id="219" type="Side Story">Cowboy Bebop: Tengoku no Tobira</anime>
+        return extractor.extractLabelledLinks(
+            snippets = data.listNotNull<String>("relatedAnime"),
+            labelSelector = "//anime/@type",
+            linkSelector = "//anime/@id",
+        ).flatMap { entry -> entry.links.map { RelatedAnime.of(metaDataProviderConfig.buildAnimeLink(it.trim()), entry.label) } }
             .toHashSet()
     }
 
diff --git a/anidb/src/test/kotlin/io/github/manamiproject/modb/anidb/AnidbAnimeConverterTest.kt b/anidb/src/test/kotlin/io/github/manamiproject/modb/anidb/AnidbAnimeConverterTest.kt
index 8098276b..e3ff9113 100644
--- a/anidb/src/test/kotlin/io/github/manamiproject/modb/anidb/AnidbAnimeConverterTest.kt
+++ b/anidb/src/test/kotlin/io/github/manamiproject/modb/anidb/AnidbAnimeConverterTest.kt
@@ -1,5 +1,6 @@
 package io.github.manamiproject.modb.anidb
 
+import io.github.manamiproject.modb.core.anime.RelatedAnime
 import io.github.manamiproject.modb.core.anime.AnimeSeason.Season.*
 import io.github.manamiproject.modb.core.anime.AnimeStatus.*
 import io.github.manamiproject.modb.core.anime.AnimeType.*
@@ -536,15 +537,15 @@ internal class AnidbAnimeConverterTest {
 
                 // then
                 assertThat(result.relatedAnime).containsExactlyInAnyOrder(
-                    URI("https://anidb.net/anime/405"),
-                    URI("https://anidb.net/anime/368"),
-                    URI("https://anidb.net/anime/2850"),
-                    URI("https://anidb.net/anime/4576"),
-                    URI("https://anidb.net/anime/2995"),
-                    URI("https://anidb.net/anime/6141"),
-                    URI("https://anidb.net/anime/367"),
-                    URI("https://anidb.net/anime/2996"),
-                    URI("https://anidb.net/anime/6393"),
+                    RelatedAnime(URI("https://anidb.net/anime/405"), "Sequel"),
+                    RelatedAnime(URI("https://anidb.net/anime/368"), "Side story"),
+                    RelatedAnime(URI("https://anidb.net/anime/2850")),
+                    RelatedAnime(URI("https://anidb.net/anime/4576"), "Prequel"),
+                    RelatedAnime(URI("https://anidb.net/anime/2995")),
+                    RelatedAnime(URI("https://anidb.net/anime/6141"), "Side story"),
+                    RelatedAnime(URI("https://anidb.net/anime/367"), "Side story"),
+                    RelatedAnime(URI("https://anidb.net/anime/2996")),
+                    RelatedAnime(URI("https://anidb.net/anime/6393"), "Side story"),
                 )
             }
         }
diff --git a/anidb/src/test/kotlin/io/github/manamiproject/modb/anidb/AnidbApiAnimeConverterTest.kt b/anidb/src/test/kotlin/io/github/manamiproject/modb/anidb/AnidbApiAnimeConverterTest.kt
index ec90717d..976da2e7 100644
--- a/anidb/src/test/kotlin/io/github/manamiproject/modb/anidb/AnidbApiAnimeConverterTest.kt
+++ b/anidb/src/test/kotlin/io/github/manamiproject/modb/anidb/AnidbApiAnimeConverterTest.kt
@@ -1,5 +1,6 @@
 package io.github.manamiproject.modb.anidb
 
+import io.github.manamiproject.modb.core.anime.RelatedAnime
 import io.github.manamiproject.modb.core.anime.AnimeSeason.Season.SPRING
 import io.github.manamiproject.modb.core.anime.AnimeStatus.FINISHED
 import io.github.manamiproject.modb.core.anime.AnimeType.TV
@@ -43,7 +44,7 @@ internal class AnidbApiAnimeConverterTest {
                 assertThat(result.sources).containsExactly(URI("https://anidb.net/anime/23"))
                 assertThat(result.picture).isEqualTo(URI("https://cdn.anidb.net/images/main/221595.jpg"))
                 assertThat(result.thumbnail).isEqualTo(URI("https://cdn.anidb.net/images/main/221595.jpg-thumb.jpg"))
-                assertThat(result.relatedAnime).containsExactly(URI("https://anidb.net/anime/219"))
+                assertThat(result.relatedAnime).containsExactly(RelatedAnime(URI("https://anidb.net/anime/219"), "Side Story"))
                 assertThat(result.synonyms).contains("Kaubojus Bibopas")
                 assertThat(result.tags).contains("bounty hunter", "detective")
             }
diff --git a/anilist/src/main/kotlin/io/github/manamiproject/modb/anilist/AnilistAnimeConverter.kt b/anilist/src/main/kotlin/io/github/manamiproject/modb/anilist/AnilistAnimeConverter.kt
index eb421a62..924940dc 100644
--- a/anilist/src/main/kotlin/io/github/manamiproject/modb/anilist/AnilistAnimeConverter.kt
+++ b/anilist/src/main/kotlin/io/github/manamiproject/modb/anilist/AnilistAnimeConverter.kt
@@ -46,7 +46,7 @@ public class AnilistAnimeConverter(
             "id" to "$.data.Media.id",
             "status" to "$.data.Media.status",
             "tags" to "$.data.Media.tags.*.name",
-            "relatedAnime" to "$.data.Media.relations.edges.*.node",
+            "relatedAnime" to "$.data.Media.relations.edges",
             "score" to "$.data.Media.meanScore",
             "creators" to "$.data.Media.studios.edges",
         ))
@@ -126,11 +126,17 @@ public class AnilistAnimeConverter(
         return hashSetOf(metaDataProviderConfig.buildAnimeLink(data.string("id").trim()))
     }
 
-    private fun extractRelatedAnime(data: ExtractionResult): HashSet<URI> {
-        return data.listNotNull<LinkedHashMap<String, Any>>("relatedAnime")
-            .filter { it["type"] == "ANIME" }
-            .mapNotNull { it["id"] }
-            .map { metaDataProviderConfig.buildAnimeLink(it.toString().trim()) }
+    private fun extractRelatedAnime(data: ExtractionResult): HashSet<RelatedAnime> {
+        return data.listNotNull<Map<String, Any>>("relatedAnime")
+            .mapNotNull { edge ->
+                val node = edge["node"] as? Map<*, *> ?: return@mapNotNull null
+                if (node["type"] != "ANIME") return@mapNotNull null
+                val id = node["id"] ?: return@mapNotNull null
+                RelatedAnime.of(
+                    uri = metaDataProviderConfig.buildAnimeLink(id.toString().trim()),
+                    relation = edge["relationType"]?.toString(),
+                )
+            }
             .toHashSet()
     }
 
diff --git a/anilist/src/test/kotlin/io/github/manamiproject/modb/anilist/AnilistAnimeConverterTest.kt b/anilist/src/test/kotlin/io/github/manamiproject/modb/anilist/AnilistAnimeConverterTest.kt
index b304483a..a81a6b72 100644
--- a/anilist/src/test/kotlin/io/github/manamiproject/modb/anilist/AnilistAnimeConverterTest.kt
+++ b/anilist/src/test/kotlin/io/github/manamiproject/modb/anilist/AnilistAnimeConverterTest.kt
@@ -1,5 +1,6 @@
 package io.github.manamiproject.modb.anilist
 
+import io.github.manamiproject.modb.core.anime.RelatedAnime
 import io.github.manamiproject.modb.core.anime.AnimeSeason.Season.*
 import io.github.manamiproject.modb.core.anime.AnimeStatus.*
 import io.github.manamiproject.modb.core.anime.AnimeType.*
@@ -410,9 +411,9 @@ internal class AnilistAnimeConverterTest {
 
                 // then
                 assertThat(result.relatedAnime).containsExactlyInAnyOrder(
-                    URI("https://anilist.co/anime/107298"),
-                    URI("https://anilist.co/anime/116147"),
-                    URI("https://anilist.co/anime/97857"),
+                    RelatedAnime(URI("https://anilist.co/anime/107298"), "SIDE_STORY"),
+                    RelatedAnime(URI("https://anilist.co/anime/116147"), "SEQUEL"),
+                    RelatedAnime(URI("https://anilist.co/anime/97857"), "PREQUEL"),
                 )
             }
         }
@@ -434,7 +435,7 @@ internal class AnilistAnimeConverterTest {
 
                 // then
                 assertThat(result.relatedAnime).containsExactly(
-                    URI("https://anilist.co/anime/2337")
+                    RelatedAnime(URI("https://anilist.co/anime/2337"), "ALTERNATIVE")
                 )
             }
         }
@@ -456,18 +457,18 @@ internal class AnilistAnimeConverterTest {
 
                 // then
                 assertThat(result.relatedAnime).containsExactlyInAnyOrder(
-                    URI("https://anilist.co/anime/100148"),
-                    URI("https://anilist.co/anime/1081"),
-                    URI("https://anilist.co/anime/1301"),
-                    URI("https://anilist.co/anime/1302"),
-                    URI("https://anilist.co/anime/1491"),
-                    URI("https://anilist.co/anime/1645"),
-                    URI("https://anilist.co/anime/1676"),
-                    URI("https://anilist.co/anime/1706"),
-                    URI("https://anilist.co/anime/17269"),
-                    URI("https://anilist.co/anime/2202"),
-                    URI("https://anilist.co/anime/2203"),
-                    URI("https://anilist.co/anime/2470"),
+                    RelatedAnime(URI("https://anilist.co/anime/100148"), "ALTERNATIVE"),
+                    RelatedAnime(URI("https://anilist.co/anime/1081"), "SIDE_STORY"),
+                    RelatedAnime(URI("https://anilist.co/anime/1301"), "PREQUEL"),
+                    RelatedAnime(URI("https://anilist.co/anime/1302"), "CHARACTER"),
+                    RelatedAnime(URI("https://anilist.co/anime/1491"), "CHARACTER"),
+                    RelatedAnime(URI("https://anilist.co/anime/1645"), "SEQUEL"),
+                    RelatedAnime(URI("https://anilist.co/anime/1676"), "SIDE_STORY"),
+                    RelatedAnime(URI("https://anilist.co/anime/1706"), "ALTERNATIVE"),
+                    RelatedAnime(URI("https://anilist.co/anime/17269"), "ALTERNATIVE"),
+                    RelatedAnime(URI("https://anilist.co/anime/2202"), "ALTERNATIVE"),
+                    RelatedAnime(URI("https://anilist.co/anime/2203"), "ALTERNATIVE"),
+                    RelatedAnime(URI("https://anilist.co/anime/2470"), "SIDE_STORY"),
                 )
             }
         }
diff --git a/anime-planet/src/main/kotlin/io/github/manamiproject/modb/animeplanet/AnimePlanetAnimeConverter.kt b/anime-planet/src/main/kotlin/io/github/manamiproject/modb/animeplanet/AnimePlanetAnimeConverter.kt
index 038d1805..50d87213 100644
--- a/anime-planet/src/main/kotlin/io/github/manamiproject/modb/animeplanet/AnimePlanetAnimeConverter.kt
+++ b/anime-planet/src/main/kotlin/io/github/manamiproject/modb/animeplanet/AnimePlanetAnimeConverter.kt
@@ -9,6 +9,7 @@ import io.github.manamiproject.modb.core.extensions.neitherNullNorBlank
 import io.github.manamiproject.modb.core.extensions.remove
 import io.github.manamiproject.modb.core.extractor.DataExtractor
 import io.github.manamiproject.modb.core.extractor.ExtractionResult
+import io.github.manamiproject.modb.core.extractor.extractLabelledLinks
 import io.github.manamiproject.modb.core.extractor.JsonDataExtractor
 import io.github.manamiproject.modb.core.extractor.XmlDataExtractor
 import io.github.manamiproject.modb.core.anime.*
@@ -51,7 +52,7 @@ public class AnimePlanetAnimeConverter(
             "seasonYear" to "//section[@class='pure-g entryBar']//span[@class='iconYear']/following-sibling::*/text()",
             "source" to "//link[@rel='canonical']/@href",
             "alternativeTitle" to "//h2[@class='aka']/text()",
-            "relatedAnime" to "//div[@id='tabs--relations--anime']/div//a/@href",
+            "relatedAnime" to "//div[@id='tabs--relations--anime']/div//a/html()",
             "tags" to "//div[contains(@class, 'tags')]//a/text()",
             "studios" to "//a[contains(@href, '/studios/')]/text()",
         ))
@@ -266,15 +267,19 @@ public class AnimePlanetAnimeConverter(
         return tags
     }
 
-    private fun extractRelatedAnime(data: ExtractionResult): HashSet<URI> {
-        return if (data.notFound("relatedAnime")) {
-            hashSetOf()
-        } else {
-            data.listNotNull<String>("relatedAnime")
-                .map { it.remove("/anime/") }
-                .map { metaDataProviderConfig.buildAnimeLink(it) }
-                .toHashSet()
+    private suspend fun extractRelatedAnime(data: ExtractionResult): HashSet<RelatedAnime> {
+        if (data.notFound("relatedAnime")) {
+            return hashSetOf()
         }
+
+        // <a href="/anime/..." class="RelatedEntry ..."> ... <span class="RelatedEntry__subtitle ...">Side Story</span>
+        // The subtitle is optional.
+        return xmlExtractor.extractLabelledLinks(
+            snippets = data.listNotNull<String>("relatedAnime"),
+            labelSelector = "//span[contains(@class, 'RelatedEntry__subtitle')]/text()",
+            linkSelector = "//a/@href",
+        ).flatMap { entry -> entry.links.map { RelatedAnime.of(metaDataProviderConfig.buildAnimeLink(it.remove("/anime/")), entry.label) } }
+            .toHashSet()
     }
 
     private fun extractScore(jsonldData: ExtractionResult): MetaDataProviderScore {
diff --git a/anime-planet/src/test/kotlin/io/github/manamiproject/modb/animeplanet/AnimePlanetAnimeConverterTest.kt b/anime-planet/src/test/kotlin/io/github/manamiproject/modb/animeplanet/AnimePlanetAnimeConverterTest.kt
index a399d66f..fffdc25a 100644
--- a/anime-planet/src/test/kotlin/io/github/manamiproject/modb/animeplanet/AnimePlanetAnimeConverterTest.kt
+++ b/anime-planet/src/test/kotlin/io/github/manamiproject/modb/animeplanet/AnimePlanetAnimeConverterTest.kt
@@ -1,5 +1,6 @@
 package io.github.manamiproject.modb.animeplanet
 
+import io.github.manamiproject.modb.core.anime.RelatedAnime
 import io.github.manamiproject.modb.core.anime.AnimeSeason
 import io.github.manamiproject.modb.core.anime.AnimeSeason.Season.*
 import io.github.manamiproject.modb.core.anime.AnimeStatus.*
@@ -1020,13 +1021,13 @@ internal class AnimePlanetAnimeConverterTest {
 
                 // then
                 assertThat(result.relatedAnime).containsExactlyInAnyOrder(
-                    URI("https://anime-planet.com/anime/fullmetal-alchemist"),
-                    URI("https://anime-planet.com/anime/fullmetal-alchemist-brotherhood-4-koma-theater"),
-                    URI("https://anime-planet.com/anime/fullmetal-alchemist-brotherhood-specials"),
-                    URI("https://anime-planet.com/anime/fullmetal-alchemist-premium-collection"),
-                    URI("https://anime-planet.com/anime/fullmetal-alchemist-reflections"),
-                    URI("https://anime-planet.com/anime/fullmetal-alchemist-the-movie-conqueror-of-shamballa"),
-                    URI("https://anime-planet.com/anime/fullmetal-alchemist-the-sacred-star-of-milos"),
+                    RelatedAnime(URI("https://anime-planet.com/anime/fullmetal-alchemist"), "Other Franchise"),
+                    RelatedAnime(URI("https://anime-planet.com/anime/fullmetal-alchemist-brotherhood-4-koma-theater"), "Omake"),
+                    RelatedAnime(URI("https://anime-planet.com/anime/fullmetal-alchemist-brotherhood-specials"), "Side Story"),
+                    RelatedAnime(URI("https://anime-planet.com/anime/fullmetal-alchemist-premium-collection"), "Other Franchise"),
+                    RelatedAnime(URI("https://anime-planet.com/anime/fullmetal-alchemist-reflections"), "Other Franchise"),
+                    RelatedAnime(URI("https://anime-planet.com/anime/fullmetal-alchemist-the-movie-conqueror-of-shamballa"), "Other Franchise"),
+                    RelatedAnime(URI("https://anime-planet.com/anime/fullmetal-alchemist-the-sacred-star-of-milos")),
                 )
             }
         }
@@ -1049,12 +1050,12 @@ internal class AnimePlanetAnimeConverterTest {
 
                 // then
                 assertThat(result.relatedAnime).containsExactlyInAnyOrder(
-                    URI("https://anime-planet.com/anime/demon-slayer-kimetsu-no-yaiba-entertainment-district-arc"),
-                    URI("https://anime-planet.com/anime/demon-slayer-kimetsu-no-yaiba-movie-mugen-train"),
-                    URI("https://anime-planet.com/anime/demon-slayer-kimetsu-no-yaiba-mugen-train"),
-                    URI("https://anime-planet.com/anime/demon-slayer-kimetsu-no-yaiba-swordsmith-village-arc"),
-                    URI("https://anime-planet.com/anime/kimetsu-gakuen-monogatari-kimetsu-no-utage-tokubetsu-hen"),
-                    URI("https://anime-planet.com/anime/kimetsu-gakuen-valentine-hen"),
+                    RelatedAnime(URI("https://anime-planet.com/anime/demon-slayer-kimetsu-no-yaiba-entertainment-district-arc")),
+                    RelatedAnime(URI("https://anime-planet.com/anime/demon-slayer-kimetsu-no-yaiba-movie-mugen-train"), "Sequel"),
+                    RelatedAnime(URI("https://anime-planet.com/anime/demon-slayer-kimetsu-no-yaiba-mugen-train"), "Sequel"),
+                    RelatedAnime(URI("https://anime-planet.com/anime/demon-slayer-kimetsu-no-yaiba-swordsmith-village-arc")),
+                    RelatedAnime(URI("https://anime-planet.com/anime/kimetsu-gakuen-monogatari-kimetsu-no-utage-tokubetsu-hen")),
+                    RelatedAnime(URI("https://anime-planet.com/anime/kimetsu-gakuen-valentine-hen")),
                 )
             }
         }
diff --git a/animenewsnetwork/src/main/kotlin/io/github/manamiproject/AnimenewsnetworkAnimeConverter.kt b/animenewsnetwork/src/main/kotlin/io/github/manamiproject/AnimenewsnetworkAnimeConverter.kt
index 4be03d00..8b6ef3ca 100644
--- a/animenewsnetwork/src/main/kotlin/io/github/manamiproject/AnimenewsnetworkAnimeConverter.kt
+++ b/animenewsnetwork/src/main/kotlin/io/github/manamiproject/AnimenewsnetworkAnimeConverter.kt
@@ -56,7 +56,7 @@ public class AnimenewsnetworkAnimeConverter(
             "synonyms" to "//div[@id='infotype-2']//div",
             "genres" to "//div[@id='infotype-30']//a/text()",
             "themes" to "//div[@id='infotype-31']//a/text()",
-            "relatedAnime" to "//div[@id='infotype-related']//a/@href",
+            "relatedAnime" to "//div[@id='infotype-related']/html()",
             "duration" to "//div[@id='infotype-4']//span/text()",
             "year_list_all" to "//div[@id='infotype-7']//div//text()",
         ))
@@ -275,17 +275,27 @@ public class AnimenewsnetworkAnimeConverter(
         return genres.union(themes).toHashSet()
     }
 
-    private fun extractRelatedAnime(data: ExtractionResult): HashSet<URI> {
-        val entries = if (data.notFound("relatedAnime")) {
-            hashSetOf()
-        } else {
-            data.listNotNull<String>("relatedAnime")
+    /**
+     * The relation is plain text next to the link:
+     * + `[ sequel of <a href="/encyclopedia/anime.php?id=7809">Clannad (TV)</a> ]` (header) → `sequel of`
+     * + `<a href="/encyclopedia/anime.php?id=33628">Frieren (TV 2)</a> (sequel)<br>` (list) → `sequel`
+     */
+    private fun extractRelatedAnime(data: ExtractionResult): HashSet<RelatedAnime> {
+        if (data.notFound("relatedAnime")) {
+            return hashSetOf()
         }
 
-        return entries.filter { it.contains("anime.php") }
-            .map { it.substringAfterLast('=') }
-            .map { metaDataProviderConfig.buildAnimeLink(it) }
-            .toHashSet()
+        return data.listNotNull<String>("relatedAnime").flatMap { html ->
+            relatedAnimeLinkRegex.findAll(html).map { match ->
+                val textBefore = html.substring(0, match.range.first).substringAfterLast('>')
+                val label = if (textBefore.contains('[') || textBefore.trimStart().startsWith(',')) {
+                    textBefore.substringAfterLast('[').trimStart().removePrefix(",")
+                } else {
+                    relationInBracketsRegex.find(match.groups["after"]?.value ?: EMPTY)?.groups?.get("label")?.value
+                }
+                RelatedAnime.of(metaDataProviderConfig.buildAnimeLink(match.groups["id"]!!.value), label)
+            }.toList()
+        }.toHashSet()
     }
 
     private fun extractDuration(data: ExtractionResult): Duration {
@@ -440,6 +450,8 @@ public class AnimenewsnetworkAnimeConverter(
             season = UNDEFINED,
         )
 
+        private val relatedAnimeLinkRegex = """<a [^>]*href="[^"]*anime\.php\?id=(?<id>\d+)"[^>]*>[^<]*</a>(?<after>[^<]*)""".toRegex()
+        private val relationInBracketsRegex = """^\s*\((?<label>[^)]*)\)""".toRegex()
         private val yearMonthRegex = """.*?(?<year>\d{4})(-(?<month>\d{2}))?.*?""".toRegex()
         private val yearMonthDayRegex = """.*?(?<year>\d{4})(-(?<month>\d{2}))?(-(?<day>\d{2}))?.*""".toRegex()
         private val new_language_lock_identifiers = hashSetOf(' ', ')')
diff --git a/animenewsnetwork/src/test/kotlin/io/github/manamiproject/AnimenewsnetworkAnimeConverterTest.kt b/animenewsnetwork/src/test/kotlin/io/github/manamiproject/AnimenewsnetworkAnimeConverterTest.kt
index 5028cc0c..5cd39033 100644
--- a/animenewsnetwork/src/test/kotlin/io/github/manamiproject/AnimenewsnetworkAnimeConverterTest.kt
+++ b/animenewsnetwork/src/test/kotlin/io/github/manamiproject/AnimenewsnetworkAnimeConverterTest.kt
@@ -1,5 +1,6 @@
 package io.github.manamiproject
 
+import io.github.manamiproject.modb.core.anime.RelatedAnime
 import io.github.manamiproject.modb.core.anime.AnimeSeason.Season.*
 import io.github.manamiproject.modb.core.anime.AnimeStatus.*
 import io.github.manamiproject.modb.core.anime.AnimeType.*
@@ -1004,7 +1005,33 @@ internal class AnimenewsnetworkAnimeConverterTest {
 
                 // then
                 assertThat(result.relatedAnime).containsExactlyInAnyOrder(
-                    URI("https://animenewsnetwork.com/encyclopedia/anime.php?id=7809")
+                    RelatedAnime(URI("https://animenewsnetwork.com/encyclopedia/anime.php?id=7809"), "sequel of")
+                )
+            }
+        }
+
+        @Test
+        fun `relations in brackets separated by comma each keep their own label`() {
+            runTest {
+                // given
+                val testAnimenewsnetworkConfig = object : MetaDataProviderConfig by TestMetaDataProviderConfig {
+                    override fun hostname(): Hostname = AnimenewsnetworkConfig.hostname()
+                    override fun buildAnimeLink(id: AnimeId): URI = AnimenewsnetworkConfig.buildAnimeLink(id)
+                    override fun fileSuffix(): FileSuffix = AnimenewsnetworkConfig.fileSuffix()
+                }
+
+                val converter = AnimenewsnetworkAnimeConverter(testAnimenewsnetworkConfig)
+
+                // [ part of <a>[Gundam]</a>, compilation of <a>Mobile Suit Gundam Wing (TV)</a> ]
+                val testFile = loadTestResource<String>("AnimenewsnetworkAnimeConverterTest/duration/one-hour-per-episode.html")
+
+                // when
+                val result = converter.convert(testFile)
+
+                // then
+                assertThat(result.relatedAnime).containsExactlyInAnyOrder(
+                    RelatedAnime(URI("https://animenewsnetwork.com/encyclopedia/anime.php?id=4189"), "part of"),
+                    RelatedAnime(URI("https://animenewsnetwork.com/encyclopedia/anime.php?id=26"), "compilation of"),
                 )
             }
         }
@@ -1050,8 +1077,8 @@ internal class AnimenewsnetworkAnimeConverterTest {
 
                 // then
                 assertThat(result.relatedAnime).containsExactlyInAnyOrder(
-                    URI("https://animenewsnetwork.com/encyclopedia/anime.php?id=33628"),
-                    URI("https://animenewsnetwork.com/encyclopedia/anime.php?id=30277"),
+                    RelatedAnime(URI("https://animenewsnetwork.com/encyclopedia/anime.php?id=33628"), "sequel"),
+                    RelatedAnime(URI("https://animenewsnetwork.com/encyclopedia/anime.php?id=30277"), "spinoff"),
                 )
             }
         }
@@ -1075,9 +1102,9 @@ internal class AnimenewsnetworkAnimeConverterTest {
 
                 // then
                 assertThat(result.relatedAnime).containsExactlyInAnyOrder(
-                    URI("https://animenewsnetwork.com/encyclopedia/anime.php?id=2960"),
-                    URI("https://animenewsnetwork.com/encyclopedia/anime.php?id=14079"),
-                    URI("https://animenewsnetwork.com/encyclopedia/anime.php?id=12180"),
+                    RelatedAnime(URI("https://animenewsnetwork.com/encyclopedia/anime.php?id=2960"), "alternate retelling of"),
+                    RelatedAnime(URI("https://animenewsnetwork.com/encyclopedia/anime.php?id=14079"), "side story"),
+                    RelatedAnime(URI("https://animenewsnetwork.com/encyclopedia/anime.php?id=12180"), "side story"),
                 )
             }
         }
@@ -1101,14 +1128,14 @@ internal class AnimenewsnetworkAnimeConverterTest {
 
                 // then
                 assertThat(result.relatedAnime).containsExactlyInAnyOrder(
-                    URI("https://animenewsnetwork.com/encyclopedia/anime.php?id=20000"),
-                    URI("https://animenewsnetwork.com/encyclopedia/anime.php?id=28763"),
-                    URI("https://animenewsnetwork.com/encyclopedia/anime.php?id=23886"),
-                    URI("https://animenewsnetwork.com/encyclopedia/anime.php?id=24366"),
-                    URI("https://animenewsnetwork.com/encyclopedia/anime.php?id=27622"),
-                    URI("https://animenewsnetwork.com/encyclopedia/anime.php?id=26353"),
-                    URI("https://animenewsnetwork.com/encyclopedia/anime.php?id=26831"),
-                    URI("https://animenewsnetwork.com/encyclopedia/anime.php?id=31113"),
+                    RelatedAnime(URI("https://animenewsnetwork.com/encyclopedia/anime.php?id=20000"), "spinoff of"),
+                    RelatedAnime(URI("https://animenewsnetwork.com/encyclopedia/anime.php?id=28763")),
+                    RelatedAnime(URI("https://animenewsnetwork.com/encyclopedia/anime.php?id=23886")),
+                    RelatedAnime(URI("https://animenewsnetwork.com/encyclopedia/anime.php?id=24366"), "sequel"),
+                    RelatedAnime(URI("https://animenewsnetwork.com/encyclopedia/anime.php?id=27622")),
+                    RelatedAnime(URI("https://animenewsnetwork.com/encyclopedia/anime.php?id=26353"), "adaptation"),
+                    RelatedAnime(URI("https://animenewsnetwork.com/encyclopedia/anime.php?id=26831"), "side story"),
+                    RelatedAnime(URI("https://animenewsnetwork.com/encyclopedia/anime.php?id=31113"), "sequel"),
                 )
             }
         }
diff --git a/anisearch/src/main/kotlin/io/github/manamiproject/modb/anisearch/AnisearchAnimeConverter.kt b/anisearch/src/main/kotlin/io/github/manamiproject/modb/anisearch/AnisearchAnimeConverter.kt
index a6f1afd5..1aee9a66 100644
--- a/anisearch/src/main/kotlin/io/github/manamiproject/modb/anisearch/AnisearchAnimeConverter.kt
+++ b/anisearch/src/main/kotlin/io/github/manamiproject/modb/anisearch/AnisearchAnimeConverter.kt
@@ -14,6 +14,8 @@ import io.github.manamiproject.modb.core.coroutines.ModbDispatchers.LIMITED_CPU
 import io.github.manamiproject.modb.core.extensions.*
 import io.github.manamiproject.modb.core.extractor.DataExtractor
 import io.github.manamiproject.modb.core.extractor.ExtractionResult
+import io.github.manamiproject.modb.core.extractor.WRAP_TABLE_ROW
+import io.github.manamiproject.modb.core.extractor.extractLabelledLinks
 import io.github.manamiproject.modb.core.extractor.JsonDataExtractor
 import io.github.manamiproject.modb.core.extractor.XmlDataExtractor
 import kotlinx.coroutines.withContext
@@ -247,23 +249,28 @@ public class AnisearchAnimeConverter(
         return synonyms.map { it.trimStart(',').trimEnd(',') }.toHashSet()
     }
 
-    private suspend fun extractRelatedAnime(data: ExtractionResult): HashSet<URI> = withContext(LIMITED_CPU) {
+    private suspend fun extractRelatedAnime(data: ExtractionResult): HashSet<RelatedAnime> = withContext(LIMITED_CPU) {
         val id = data.string("source")
         val relationsFile = relationsDir.resolve("$id.${metaDataProviderConfig.fileSuffix()}")
 
         check(relationsFile.regularFileExists()) { "Relations file is missing for [$id]." }
 
         val relatedAnimeData = xmlExtractor.extract(relationsFile.readFile(), mapOf(
-            "relatedAnime" to "//section[@id='relations_anime']//table//tbody//a/@href",
+            "relatedAnime" to "//section[@id='relations_anime']//table//tbody//tr/html()",
         ))
 
         if (relatedAnimeData.notFound("relatedAnime")) {
             hashSetOf()
         } else {
-            relatedAnimeData.listNotNull<String>("relatedAnime")
-                .map { it.remove("anime/") }
-                .map { it.substring(0, it.indexOf(',')) }
-                .map { metaDataProviderConfig.buildAnimeLink(it) }
+            // <tr><th><a href="anime/2753,ghost-in-the-shell-2-innocence">...</a><br><span ...>Sequel</span></th>...</tr>
+            xmlExtractor.extractLabelledLinks(
+                snippets = relatedAnimeData.listNotNull<String>("relatedAnime"),
+                labelSelector = "//th//span/text()",
+                linkSelector = "//a/@href",
+                wrap = WRAP_TABLE_ROW,
+            ).flatMap { entry -> entry.links.map { it to entry.label } }
+                .map { (link, label) -> link.remove("anime/") to label?.takeUnless { it.trim() == "?" } } // "?" = relation unknown
+                .map { (link, label) -> RelatedAnime.of(metaDataProviderConfig.buildAnimeLink(link.substring(0, link.indexOf(','))), label) }
                 .toHashSet()
         }
     }
diff --git a/anisearch/src/test/kotlin/io/github/manamiproject/modb/anisearch/AnisearchAnimeConverterTest.kt b/anisearch/src/test/kotlin/io/github/manamiproject/modb/anisearch/AnisearchAnimeConverterTest.kt
index ae63f8d9..47cf19ad 100644
--- a/anisearch/src/test/kotlin/io/github/manamiproject/modb/anisearch/AnisearchAnimeConverterTest.kt
+++ b/anisearch/src/test/kotlin/io/github/manamiproject/modb/anisearch/AnisearchAnimeConverterTest.kt
@@ -1,5 +1,6 @@
 package io.github.manamiproject.modb.anisearch
 
+import io.github.manamiproject.modb.core.anime.RelatedAnime
 import io.github.manamiproject.modb.core.anime.AnimeMedia.NO_PICTURE
 import io.github.manamiproject.modb.core.anime.AnimeMedia.NO_PICTURE_THUMBNAIL
 import io.github.manamiproject.modb.core.anime.AnimeSeason.Season.*
@@ -1816,7 +1817,7 @@ internal class AnisearchAnimeConverterTest {
 
                 // then
                 assertThat(result.relatedAnime).containsExactly(
-                    URI("https://anisearch.com/anime/17530")
+                    RelatedAnime(URI("https://anisearch.com/anime/17530"))
                 )
             }
         }
@@ -1844,9 +1845,9 @@ internal class AnisearchAnimeConverterTest {
                 val result = converter.convert(main)
 
                 // then
-                assertThat(result.relatedAnime).containsExactly(
-                    URI("https://anisearch.com/anime/2088"),
-                    URI("https://anisearch.com/anime/2753"),
+                assertThat(result.relatedAnime).containsExactlyInAnyOrder(
+                    RelatedAnime(URI("https://anisearch.com/anime/2088"), "Remake"),
+                    RelatedAnime(URI("https://anisearch.com/anime/2753"), "Sequel"),
                 )
             }
         }
diff --git a/core/src/main/kotlin/io/github/manamiproject/modb/core/anime/Anime.kt b/core/src/main/kotlin/io/github/manamiproject/modb/core/anime/Anime.kt
index a23fd95b..a6e12f61 100644
--- a/core/src/main/kotlin/io/github/manamiproject/modb/core/anime/Anime.kt
+++ b/core/src/main/kotlin/io/github/manamiproject/modb/core/anime/Anime.kt
@@ -24,7 +24,7 @@ import io.github.manamiproject.modb.core.anime.Duration.Companion.UNKNOWN as UNK
  * @property synonyms Duplicate-free list of alternative titles. Synonyms are case-sensitive.
  * @property studios Lower case studio names. In general a duplicate free list, but might contain duplicates for different writings.
  * @property producers Lower case producers names. Companies only. In general a duplicate free list, but might contain duplicates for different writings.
- * @property relatedAnime Duplicate-free list of links to related anime.
+ * @property relatedAnime Duplicate-free list of links to related anime including the kind of relation as labelled by the metadata provider. One entry per link.
  * @property tags Duplicate-free list of tags. This contains both genres and tags from metadata providers. All tags are lower case.
  */
 public data class Anime(
@@ -41,7 +41,7 @@ public data class Anime(
     val synonyms: HashSet<Title> = HashSet(),
     val studios: HashSet<Studio> = HashSet(),
     val producers: HashSet<Producer> = HashSet(),
-    val relatedAnime: HashSet<URI> = HashSet(),
+    val relatedAnime: HashSet<RelatedAnime> = HashSet(),
     val tags: HashSet<Tag> = HashSet(),
 ) {
 
diff --git a/core/src/main/kotlin/io/github/manamiproject/modb/core/anime/AnimeRaw.kt b/core/src/main/kotlin/io/github/manamiproject/modb/core/anime/AnimeRaw.kt
index b72df026..562d369c 100644
--- a/core/src/main/kotlin/io/github/manamiproject/modb/core/anime/AnimeRaw.kt
+++ b/core/src/main/kotlin/io/github/manamiproject/modb/core/anime/AnimeRaw.kt
@@ -35,8 +35,8 @@ import io.github.manamiproject.modb.core.anime.Duration.Companion.UNKNOWN as UNK
  * @property studios List of studio names. May contain duplicates for slightly different writings. All studio names are lower case.
  * @param _producers List of names of producers as provided by the metadata providers.
  * @property producers List of names of producers. May contain duplicates for slightly different writings. All producer names are lower case.
- * @param _relatedAnime Duplicate-free list of links to related anime.
- * @property relatedAnime Duplicate-free list of links to related anime.
+ * @param _relatedAnime Duplicate-free list of links to related anime including the kind of relation. One entry per link.
+ * @property relatedAnime Duplicate-free list of links to related anime including the kind of relation. One entry per link.
  * @param _tags Duplicate-free list of tags. This contains both genres and tags from metadata providers. All tags transformed to lower case.
  * @property tags Duplicate-free list of tags. This contains both genres and tags from metadata providers. All tags are lower case.
  * @property metaDataProviderScores Contains a score for each metadata provider. The property will not be serialized as-is. It's serialized using backing field [scores].
@@ -56,7 +56,7 @@ public data class AnimeRaw(
     private val _synonyms: HashSet<Title> = HashSet(),
     private val _studios: HashSet<Studio> = HashSet(),
     private val _producers: HashSet<Producer> = HashSet(),
-    private val _relatedAnime: HashSet<URI> = HashSet(),
+    private val _relatedAnime: HashSet<RelatedAnime> = HashSet(),
     private val _tags: HashSet<Tag> = HashSet(),
     @Transient private val metaDataProviderScores: HashMap<Hostname, MetaDataProviderScoreValue> = hashMapOf(),
     @Transient val activateChecks: Boolean = true,
@@ -98,10 +98,10 @@ public data class AnimeRaw(
         get() = _producers.toHashSet()
 
     /**
-     * Duplicate-free list of links to related anime.
-     * @since 16.6.0
+     * Duplicate-free list of links to related anime including the kind of relation. One entry per link.
+     * @since 20.0.0
      */
-    val relatedAnime: HashSet<URI>
+    val relatedAnime: HashSet<RelatedAnime>
         get() = _relatedAnime.toHashSet()
 
     /**
@@ -313,36 +313,66 @@ public data class AnimeRaw(
 
     /**
      * Add additional related anime to the existing list. This will **not** override [relatedAnime].
-     * Duplicates are being ignored.
-     * @since 11.0.0
-     * @param relatedAnime List of related anime.
+     * Links which are part of [sources] are ignored. There is only one entry per link: an entry having a
+     * [RelatedAnime.relation] replaces an existing entry without one, otherwise the existing entry is kept.
+     * @since 20.0.0
+     * @param relatedAnime Related anime including the kind of relation.
      * @return Same instance.
      */
-    public fun addRelatedAnime(vararg relatedAnime: URI): AnimeRaw = addRelatedAnime(relatedAnime.toHashSet())
+    public fun addRelatedAnime(vararg relatedAnime: RelatedAnime): AnimeRaw = addRelatedAnime(relatedAnime.toList())
 
     /**
      * Add additional related anime to the existing list. This will **not** override [relatedAnime].
-     * Duplicates are being ignored.
-     * @since 11.0.0
-     * @param relatedAnime List of related anime.
+     * Links which are part of [sources] are ignored. There is only one entry per link: an entry having a
+     * [RelatedAnime.relation] replaces an existing entry without one, otherwise the existing entry is kept.
+     * @since 20.0.0
+     * @param relatedAnime List of related anime including the kind of relation.
      * @return Same instance.
      */
-    public fun addRelatedAnime(relatedAnime: Collection<URI>): AnimeRaw {
+    public fun addRelatedAnime(relatedAnime: Collection<RelatedAnime>): AnimeRaw {
         relatedAnime.asSequence()
-            .filter { !_sources.contains(it) }
-            .forEach { _relatedAnime.add(it) }
+            .filter { !_sources.contains(it.uri) }
+            .forEach { new ->
+                val existing = _relatedAnime.firstOrNull { it.uri == new.uri }
+                when {
+                    existing == null -> _relatedAnime.add(new)
+                    existing.relation == null && new.relation != null -> {
+                        _relatedAnime.remove(existing)
+                        _relatedAnime.add(new)
+                    }
+                }
+            }
 
         return this
     }
 
     /**
-     * Removes an [URI] from [relatedAnime] if the given condition matches.
+     * Add additional related anime for which the kind of relation is unknown.
+     * This will **not** override [relatedAnime]. See [addRelatedAnime].
+     * @since 11.0.0
+     * @param relatedAnime Links to related anime.
+     * @return Same instance.
+     */
+    public fun addRelatedAnime(vararg relatedAnime: URI): AnimeRaw = addRelatedAnime(relatedAnime.map { RelatedAnime(it) })
+
+    /**
+     * Add additional related anime for which the kind of relation is unknown.
+     * This will **not** override [relatedAnime]. See [addRelatedAnime].
+     * @since 11.0.0
+     * @param relatedAnime Links to related anime.
+     * @return Same instance.
+     */
+    @JvmName("addRelatedAnimeUris")
+    public fun addRelatedAnime(relatedAnime: Collection<URI>): AnimeRaw = addRelatedAnime(relatedAnime.map { RelatedAnime(it) })
+
+    /**
+     * Removes an entry from [relatedAnime] if the given condition matches its link.
      * @since 11.0.0
-     * @param condition If an entry in [relatedAnime] matches this condition, then the [URI] will be removed from [relatedAnime].
+     * @param condition If the link of an entry in [relatedAnime] matches this condition, then the entry will be removed from [relatedAnime].
      * @return Same instance.
      */
     public fun removeRelatedAnimeIf(condition: (URI) -> Boolean): AnimeRaw {
-        _relatedAnime.removeIf { condition.invoke(it) }
+        _relatedAnime.removeIf { condition.invoke(it.uri) }
         return this
     }
 
@@ -515,7 +545,7 @@ public data class AnimeRaw(
         _producers.clear()
         addProducers(uncheckedProducers)
 
-        val uncheckedRelatedAnime: Collection<URI> = _relatedAnime.toSet()
+        val uncheckedRelatedAnime: Collection<RelatedAnime> = _relatedAnime.toSet()
         _relatedAnime.clear()
         addRelatedAnime(uncheckedRelatedAnime)
 
diff --git a/core/src/main/kotlin/io/github/manamiproject/modb/core/anime/RelatedAnime.kt b/core/src/main/kotlin/io/github/manamiproject/modb/core/anime/RelatedAnime.kt
new file mode 100644
index 00000000..1f9647b9
--- /dev/null
+++ b/core/src/main/kotlin/io/github/manamiproject/modb/core/anime/RelatedAnime.kt
@@ -0,0 +1,47 @@
+package io.github.manamiproject.modb.core.anime
+
+import io.github.manamiproject.modb.core.extensions.neitherNullNorBlank
+import io.github.manamiproject.modb.core.extensions.normalize
+import java.net.URI
+
+/**
+ * Kind of relation between two anime exactly as the metadata provider labels it.
+ * Examples: `Sequel` (myanimelist), `SIDE_STORY` (anilist), `Side Story` (anidb).
+ * The labels are not unified across metadata providers.
+ * @since 20.0.0
+ */
+public typealias RelationType = String
+
+/**
+ * Link to a related anime together with the kind of relation.
+ * Use [RelatedAnime.of] to create instances from raw data, because it normalizes the label.
+ * @since 20.0.0
+ * @property uri Link to the related anime on the metadata provider.
+ * @property relation Kind of relation as labelled by the metadata provider (see [RelationType]).
+ * `null` if the metadata provider doesn't name the relation.
+ */
+public data class RelatedAnime(
+    val uri: URI,
+    val relation: RelationType? = null,
+) : Comparable<RelatedAnime> {
+
+    override fun compareTo(other: RelatedAnime): Int = compareValuesBy(this, other, { it.uri }, { it.relation })
+
+    override fun toString(): String = if (relation == null) uri.toString() else "$uri ($relation)"
+
+    public companion object {
+
+        /**
+         * Creates an instance with a normalized [relation]: line breaks, tabs and special whitespaces are replaced and
+         * the label is trimmed. Blank labels result in `null`.
+         * @since 20.0.0
+         * @param uri Link to the related anime on the metadata provider.
+         * @param relation Kind of relation as labelled by the metadata provider.
+         * @return New instance.
+         */
+        public fun of(uri: URI, relation: String? = null): RelatedAnime {
+            val normalizedRelation = relation?.normalize()?.trim()?.takeIf { it.neitherNullNorBlank() }
+            return RelatedAnime(uri, normalizedRelation)
+        }
+    }
+}
diff --git a/core/src/main/kotlin/io/github/manamiproject/modb/core/extractor/Descendant.kt b/core/src/main/kotlin/io/github/manamiproject/modb/core/extractor/Descendant.kt
index c5258a72..6c099591 100644
--- a/core/src/main/kotlin/io/github/manamiproject/modb/core/extractor/Descendant.kt
+++ b/core/src/main/kotlin/io/github/manamiproject/modb/core/extractor/Descendant.kt
@@ -21,9 +21,9 @@ internal class Descendant(private val initial: String) {
             .last()
     }
 
-    fun hasTerminatingChild(): Boolean = terminatingChild.neitherNullNorBlank() && (terminatingChild in setOf("text()", "node()") || terminatingChild.startsWith('@'))
+    fun hasTerminatingChild(): Boolean = terminatingChild.neitherNullNorBlank() && (terminatingChild in TERMINATING_FUNCTIONS || terminatingChild.startsWith('@'))
 
-    fun isTerminatingChild(): Boolean = selfPath.neitherNullNorBlank() && (selfPath in setOf("text()", "node()") || selfPath.startsWith('@'))
+    fun isTerminatingChild(): Boolean = selfPath.neitherNullNorBlank() && (selfPath in TERMINATING_FUNCTIONS || selfPath.startsWith('@'))
 
     private fun allFilters(value: String): List<String> {
         return ALL_FILTERS.findAll(value)
@@ -111,6 +111,7 @@ internal class Descendant(private val initial: String) {
     }
 
     private companion object {
+        private val TERMINATING_FUNCTIONS = setOf("text()", "node()", "html()")
         private val ALL_FILTERS = """\[(.*?)\]""".toRegex()
         private val FILTER_ATTRIBUTE_EQUALS_VALUE = """^\[@(?<attr>[\w-]+) *= *'(?<value>.*?)'\]$""".toRegex()
         private val FILTER_ATTRIBUTE_CONTAINS = """^\[contains\(@(?<attr>[\w-]+) *, *'(?<value>.*?)'\)\]$""".toRegex()
diff --git a/core/src/main/kotlin/io/github/manamiproject/modb/core/extractor/JsoupCssSelectorDataExtractor.kt b/core/src/main/kotlin/io/github/manamiproject/modb/core/extractor/JsoupCssSelectorDataExtractor.kt
index 801ec705..39b99a5d 100644
--- a/core/src/main/kotlin/io/github/manamiproject/modb/core/extractor/JsoupCssSelectorDataExtractor.kt
+++ b/core/src/main/kotlin/io/github/manamiproject/modb/core/extractor/JsoupCssSelectorDataExtractor.kt
@@ -113,6 +113,7 @@ internal object JsoupCssSelectorDataExtractor : DataExtractor {
             jsoupElements.isEmpty() -> NotFound
             terminatingChild == "text()" -> jsoupElements.eachText()
             terminatingChild == "node()" -> jsoupElements.dataNodes().map { it.wholeData.trim() }
+            terminatingChild == "html()" -> jsoupElements.map { it.outerHtml() }
             terminatingChild.eitherNullOrBlank() -> jsoupElements.textNodes().map { it.text().trim() }.filter { it.neitherNullNorBlank() }
             terminatingChild.startsWith('@') -> jsoupElements.eachAttr(terminatingChild.trimStart('@')) ?: NotFound
             else -> throw IllegalStateException("unmapped case")
diff --git a/core/src/main/kotlin/io/github/manamiproject/modb/core/extractor/JsoupXPathDataExtractor.kt b/core/src/main/kotlin/io/github/manamiproject/modb/core/extractor/JsoupXPathDataExtractor.kt
index e3e40952..2cdab4d8 100644
--- a/core/src/main/kotlin/io/github/manamiproject/modb/core/extractor/JsoupXPathDataExtractor.kt
+++ b/core/src/main/kotlin/io/github/manamiproject/modb/core/extractor/JsoupXPathDataExtractor.kt
@@ -41,6 +41,7 @@ internal object JsoupXPathDataExtractor : DataExtractor {
             split.last().startsWith("@") -> Triple(entry.key, allExceptLast, split.last().trimStart('@'))
             split.last().endsWith("text()") -> Triple(entry.key, allExceptLast, split.last())
             split.last().endsWith("node()") -> Triple(entry.key, allExceptLast, split.last())
+            split.last().endsWith("html()") -> Triple(entry.key, allExceptLast, split.last())
             else -> Triple(entry.key, entry.value, EMPTY)
         }
     }
@@ -56,6 +57,7 @@ internal object JsoupXPathDataExtractor : DataExtractor {
             jsoupElements.isEmpty() -> NotFound
             entry.third == "text()" -> jsoupElements.eachText() ?: NotFound
             entry.third == "node()" -> jsoupElements.dataNodes().map { it.wholeData.trim() }
+            entry.third == "html()" -> jsoupElements.map { it.outerHtml() }
             entry.third.eitherNullOrBlank() -> jsoupElements.textNodes().map { it.text().trim() }.filter { it.neitherNullNorBlank() }
             else -> jsoupElements.eachAttr(entry.third) ?: NotFound
         }
diff --git a/core/src/main/kotlin/io/github/manamiproject/modb/core/extractor/LabelledLinks.kt b/core/src/main/kotlin/io/github/manamiproject/modb/core/extractor/LabelledLinks.kt
new file mode 100644
index 00000000..1ab05fad
--- /dev/null
+++ b/core/src/main/kotlin/io/github/manamiproject/modb/core/extractor/LabelledLinks.kt
@@ -0,0 +1,57 @@
+package io.github.manamiproject.modb.core.extractor
+
+/**
+ * Links which belong together under a common label. Used to read related anime together with the kind of relation.
+ * @since 20.0.0
+ * @property label The label as it appears in the raw content. `null` if there is none.
+ * @property links Raw values of the links (usually `href` attributes) in the order of the raw content.
+ */
+public data class LabelledLinks(
+    val label: String?,
+    val links: List<String>,
+)
+
+/**
+ * Extracts a label and the links belonging to it from each of the given HTML snippets.
+ * The snippets are usually the result of a selector ending with `html()`, one snippet per entry or group of entries.
+ * @since 20.0.0
+ * @param snippets HTML snippets. Each one is processed on its own.
+ * @param labelSelector XPath selecting the label within a snippet. If it matches multiple times, the first match is used.
+ * @param linkSelector XPath selecting the links within a snippet.
+ * @param wrap Transforms a snippet before it is parsed. Table rows for example must be wrapped in `<table>` to be parsed correctly.
+ * @return One [LabelledLinks] per snippet which contains at least one link.
+ */
+public suspend fun DataExtractor.extractLabelledLinks(
+    snippets: List<String>,
+    labelSelector: Selector,
+    linkSelector: Selector,
+    wrap: (String) -> String = { it },
+): List<LabelledLinks> {
+    return snippets.mapNotNull { snippet ->
+        val data = extract(wrap(snippet), mapOf(
+            "label" to labelSelector,
+            "links" to linkSelector,
+        ))
+
+        if (data.notFound("links")) {
+            return@mapNotNull null
+        }
+
+        val label = if (data.notFound("label")) {
+            null
+        } else {
+            data.listNotNull<String>("label").firstOrNull()
+        }
+
+        LabelledLinks(
+            label = label,
+            links = data.listNotNull<String>("links"),
+        )
+    }
+}
+
+/**
+ * Wraps a table row (`<tr>`) in a table so that it is parsed as a row instead of being dropped by the HTML parser.
+ * @since 20.0.0
+ */
+public val WRAP_TABLE_ROW: (String) -> String = { "<table>$it</table>" }
diff --git a/core/src/main/kotlin/io/github/manamiproject/modb/core/json/AnimeAdapter.kt b/core/src/main/kotlin/io/github/manamiproject/modb/core/json/AnimeAdapter.kt
index 6f2986f3..dadc12f8 100644
--- a/core/src/main/kotlin/io/github/manamiproject/modb/core/json/AnimeAdapter.kt
+++ b/core/src/main/kotlin/io/github/manamiproject/modb/core/json/AnimeAdapter.kt
@@ -23,6 +23,7 @@ internal class AnimeAdapter: JsonAdapter<Anime>() {
     private val studioHashSetAdapter = HashSetAdapter(StudioAdapter())
     private val producerHashSetAdapter = HashSetAdapter(ProducerAdapter())
     private val uriHashSetAdapter = HashSetAdapter(UriAdapter())
+    private val relatedAnimeHashSetAdapter = HashSetAdapter(RelatedAnimeAdapter())
     private val tagHashSetAdapter = HashSetAdapter(TagAdapter())
 
     @FromJson
@@ -53,7 +54,7 @@ internal class AnimeAdapter: JsonAdapter<Anime>() {
         var studiosDeserialized = false
         var producers = HashSet<String>()
         var producersDeserialized = false
-        var relatedAnime = HashSet<URI>()
+        var relatedAnime = HashSet<RelatedAnime>()
         var relatedAnimeDeserialized = false
         var tags = HashSet<Tag>()
         var tagsDeserialized = false
@@ -111,7 +112,7 @@ internal class AnimeAdapter: JsonAdapter<Anime>() {
                     producersDeserialized = true
                 }
                 "relatedAnime" -> {
-                    relatedAnime = uriHashSetAdapter.fromJson(reader)
+                    relatedAnime = relatedAnimeHashSetAdapter.fromJson(reader)
                     relatedAnimeDeserialized = true
                 }
                 "tags" -> {
@@ -208,7 +209,7 @@ internal class AnimeAdapter: JsonAdapter<Anime>() {
         producerHashSetAdapter.toJson(writer, value.producers)
 
         writer.name("relatedAnime")
-        uriHashSetAdapter.toJson(writer, value.relatedAnime)
+        relatedAnimeHashSetAdapter.toJson(writer, value.relatedAnime)
 
         writer.name("tags")
         titleHashSetAdapter.toJson(writer, value.tags)
diff --git a/core/src/main/kotlin/io/github/manamiproject/modb/core/json/AnimeRawAdapter.kt b/core/src/main/kotlin/io/github/manamiproject/modb/core/json/AnimeRawAdapter.kt
index 87ed0851..0b406ba3 100644
--- a/core/src/main/kotlin/io/github/manamiproject/modb/core/json/AnimeRawAdapter.kt
+++ b/core/src/main/kotlin/io/github/manamiproject/modb/core/json/AnimeRawAdapter.kt
@@ -23,6 +23,7 @@ internal class AnimeRawAdapter: JsonAdapter<AnimeRaw>() {
     private val studioHashSetAdapter = HashSetAdapter(StudioAdapter())
     private val producerHashSetAdapter = HashSetAdapter(ProducerAdapter())
     private val uriHashSetAdapter = HashSetAdapter(UriAdapter())
+    private val relatedAnimeHashSetAdapter = HashSetAdapter(RelatedAnimeAdapter())
     private val tagHashSetAdapter = HashSetAdapter(TagAdapter())
 
     @FromJson
@@ -53,7 +54,7 @@ internal class AnimeRawAdapter: JsonAdapter<AnimeRaw>() {
         var studiosDeserialized = false
         var producers = HashSet<String>()
         var producersDeserialized = false
-        var relatedAnime = HashSet<URI>()
+        var relatedAnime = HashSet<RelatedAnime>()
         var relatedAnimeDeserialized = false
         var tags = HashSet<Tag>()
         var tagsDeserialized = false
@@ -111,7 +112,7 @@ internal class AnimeRawAdapter: JsonAdapter<AnimeRaw>() {
                     producersDeserialized = true
                 }
                 "relatedAnime" -> {
-                    relatedAnime = uriHashSetAdapter.fromJson(reader)
+                    relatedAnime = relatedAnimeHashSetAdapter.fromJson(reader)
                     relatedAnimeDeserialized = true
                 }
                 "tags" -> {
@@ -210,7 +211,7 @@ internal class AnimeRawAdapter: JsonAdapter<AnimeRaw>() {
         producerHashSetAdapter.toJson(writer, value.producers)
 
         writer.name("relatedAnime")
-        uriHashSetAdapter.toJson(writer, value.relatedAnime)
+        relatedAnimeHashSetAdapter.toJson(writer, value.relatedAnime)
 
         writer.name("tags")
         tagHashSetAdapter.toJson(writer, value.tags)
diff --git a/core/src/main/kotlin/io/github/manamiproject/modb/core/json/Json.kt b/core/src/main/kotlin/io/github/manamiproject/modb/core/json/Json.kt
index f3335cb1..19ab05cb 100644
--- a/core/src/main/kotlin/io/github/manamiproject/modb/core/json/Json.kt
+++ b/core/src/main/kotlin/io/github/manamiproject/modb/core/json/Json.kt
@@ -28,6 +28,7 @@ public object Json {
     @OptIn(ExperimentalStdlibApi::class)
     internal val moshi: Moshi = Moshi.Builder()
         .addAdapter(UriAdapter())
+        .addAdapter(RelatedAnimeAdapter())
         .addAdapter(DurationAdapter())
         .addAdapter(AnimeTypeAdapter())
         .addAdapter(AnimeStatusAdapter())
diff --git a/core/src/main/kotlin/io/github/manamiproject/modb/core/json/RelatedAnimeAdapter.kt b/core/src/main/kotlin/io/github/manamiproject/modb/core/json/RelatedAnimeAdapter.kt
new file mode 100644
index 00000000..542f05e2
--- /dev/null
+++ b/core/src/main/kotlin/io/github/manamiproject/modb/core/json/RelatedAnimeAdapter.kt
@@ -0,0 +1,56 @@
+package io.github.manamiproject.modb.core.json
+
+import com.squareup.moshi.*
+import com.squareup.moshi.JsonReader.Token.NULL
+import com.squareup.moshi.JsonReader.Token.STRING
+import io.github.manamiproject.modb.core.anime.RelatedAnime
+import java.net.URI
+
+/**
+ * Reads and writes [RelatedAnime] as `{"uri": "...", "relation": "..."}`. `relation` is omitted if it is unknown.
+ * For compatibility with files written before relation types existed, a plain string is read as a link without
+ * [RelatedAnime.relation].
+ */
+internal class RelatedAnimeAdapter: JsonAdapter<RelatedAnime>() {
+
+    @FromJson
+    override fun fromJson(reader: JsonReader): RelatedAnime {
+        if (reader.peek() == STRING) {
+            return RelatedAnime(URI(reader.nextString()))
+        }
+
+        reader.beginObject()
+
+        var uri: URI? = null
+        var relation: String? = null
+
+        while (reader.hasNext()) {
+            when (reader.nextName()) {
+                "uri" -> uri = URI(reader.nextString())
+                "relation" -> relation = if (reader.peek() != NULL) { reader.nextString() } else { reader.nextNull<Unit>(); null }
+                else -> reader.skipValue()
+            }
+        }
+
+        reader.endObject()
+
+        if (uri == null) {
+            throw IllegalStateException("Property 'uri' is either missing or null.")
+        }
+
+        return RelatedAnime.of(uri, relation)
+    }
+
+    @ToJson
+    override fun toJson(writer: JsonWriter, value: RelatedAnime?) {
+        requireNotNull(value) { "RelatedAnimeAdapter expects non-nullable value, but received null." }
+
+        writer.beginObject()
+        writer.name("uri").value(value.uri.toString())
+
+        // "relation" is left out if the metadata provider doesn't name the relation, regardless of serializing nulls
+        value.relation?.let { writer.name("relation").value(it) }
+
+        writer.endObject()
+    }
+}
diff --git a/core/src/test/kotlin/io/github/manamiproject/modb/core/TestingAssets.kt b/core/src/test/kotlin/io/github/manamiproject/modb/core/TestingAssets.kt
index a1e25df8..332a5ebd 100644
--- a/core/src/test/kotlin/io/github/manamiproject/modb/core/TestingAssets.kt
+++ b/core/src/test/kotlin/io/github/manamiproject/modb/core/TestingAssets.kt
@@ -239,7 +239,7 @@ internal object TestAnimeRawObjects {
                     "vap",
                 ),
                 _relatedAnime = hashSetOf(
-                    URI("https://myanimelist.net/anime/2994"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/2994")),
                 ),
                 _tags = hashSetOf(
                     "psychological",
@@ -297,7 +297,9 @@ internal object TestAnimeRawObjects {
                 "vap"
               ],
               "relatedAnime": [
-                "https://myanimelist.net/anime/2994"
+                {
+                  "uri": "https://myanimelist.net/anime/2994"
+                }
               ],
               "tags": [
                 "psychological",
@@ -309,7 +311,7 @@ internal object TestAnimeRawObjects {
         """.trimIndent()
 
         val serializedMinified = """
-            {"sources":["https://myanimelist.net/anime/1535"],"title":"Death Note","type":"TV","episodes":37,"status":"FINISHED","animeSeason":{"season":"FALL"},"picture":"https://cdn.myanimelist.net/images/anime/1079/138100.jpg","thumbnail":"https://cdn.myanimelist.net/images/anime/1079/138100t.jpg","scores":[{"hostname":"myanimelist.net","value":8.62,"range":{"minInclusive":1.0,"maxInclusive":10.0}}],"synonyms":["DN","デスノート"],"studios":["madhouse"],"producers":["d.n. dream partners","nippon television network","shueisha","vap"],"relatedAnime":["https://myanimelist.net/anime/2994"],"tags":["psychological","shounen","supernatural","suspense"]}
+            {"sources":["https://myanimelist.net/anime/1535"],"title":"Death Note","type":"TV","episodes":37,"status":"FINISHED","animeSeason":{"season":"FALL"},"picture":"https://cdn.myanimelist.net/images/anime/1079/138100.jpg","thumbnail":"https://cdn.myanimelist.net/images/anime/1079/138100t.jpg","scores":[{"hostname":"myanimelist.net","value":8.62,"range":{"minInclusive":1.0,"maxInclusive":10.0}}],"synonyms":["DN","デスノート"],"studios":["madhouse"],"producers":["d.n. dream partners","nippon television network","shueisha","vap"],"relatedAnime":[{"uri":"https://myanimelist.net/anime/2994"}],"tags":["psychological","shounen","supernatural","suspense"]}
         """.trimIndent()
     }
 
@@ -350,7 +352,7 @@ internal object TestAnimeRawObjects {
                     "pony canyon",
                 ),
                 _relatedAnime = hashSetOf(
-                    URI("https://anilist.co/anime/131520"),
+                    RelatedAnime(URI("https://anilist.co/anime/131520")),
                 ),
                 _tags = hashSetOf(
                     "comedy",
@@ -419,7 +421,9 @@ internal object TestAnimeRawObjects {
                 "pony canyon"
               ],
               "relatedAnime": [
-                "https://anilist.co/anime/131520"
+                {
+                  "uri": "https://anilist.co/anime/131520"
+                }
               ],
               "tags": [
                 "comedy",
@@ -440,7 +444,7 @@ internal object TestAnimeRawObjects {
         """.trimIndent()
 
         val serializedMinified = """
-            {"sources":["https://anilist.co/anime/177191"],"title":"Go-toubun no Hanayome *","type":"SPECIAL","episodes":2,"status":"FINISHED","animeSeason":{"season":"FALL","year":2024},"picture":"https://s4.anilist.co/file/anilistcdn/media/anime/cover/medium/bx177191-ovNZsq8EbIPY.jpg","thumbnail":"https://s4.anilist.co/file/anilistcdn/media/anime/cover/medium/bx177191-ovNZsq8EbIPY.jpg","duration":{"value":1440,"unit":"SECONDS"},"scores":[{"hostname":"anilist.co","value":75.0,"range":{"minInclusive":1.0,"maxInclusive":100.0}}],"synonyms":["The Quintessential Quintuplets*","五等分の花嫁*"],"studios":["bibury animation studios"],"producers":["dax production","nichion","pony canyon"],"relatedAnime":["https://anilist.co/anime/131520"],"tags":["comedy","drama","ensemble cast","female harem","heterosexual","language barrier","male protagonist","marriage","primarily female cast","romance","school","shounen","twins"]}
+            {"sources":["https://anilist.co/anime/177191"],"title":"Go-toubun no Hanayome *","type":"SPECIAL","episodes":2,"status":"FINISHED","animeSeason":{"season":"FALL","year":2024},"picture":"https://s4.anilist.co/file/anilistcdn/media/anime/cover/medium/bx177191-ovNZsq8EbIPY.jpg","thumbnail":"https://s4.anilist.co/file/anilistcdn/media/anime/cover/medium/bx177191-ovNZsq8EbIPY.jpg","duration":{"value":1440,"unit":"SECONDS"},"scores":[{"hostname":"anilist.co","value":75.0,"range":{"minInclusive":1.0,"maxInclusive":100.0}}],"synonyms":["The Quintessential Quintuplets*","五等分の花嫁*"],"studios":["bibury animation studios"],"producers":["dax production","nichion","pony canyon"],"relatedAnime":[{"uri":"https://anilist.co/anime/131520"}],"tags":["comedy","drama","ensemble cast","female harem","heterosexual","language barrier","male protagonist","marriage","primarily female cast","romance","school","shounen","twins"]}
         """.trimIndent()
     }
 
@@ -499,18 +503,18 @@ internal object TestAnimeRawObjects {
                     "pony canyon",
                 ),
                 _relatedAnime = hashSetOf(
-                    URI("https://anidb.net/anime/16165"),
-                    URI("https://anilist.co/anime/131520"),
-                    URI("https://anime-planet.com/anime/the-quintessential-quintuplets-movie"),
-                    URI("https://animecountdown.com/1577789"),
-                    URI("https://anisearch.com/anime/16091"),
-                    URI("https://kitsu.app/anime/44229"),
-                    URI("https://livechart.me/anime/10488"),
-                    URI("https://livechart.me/anime/11921"),
-                    URI("https://livechart.me/anime/3448"),
-                    URI("https://livechart.me/anime/9428"),
-                    URI("https://myanimelist.net/anime/48548"),
-                    URI("https://simkl.com/anime/1577789"),
+                    RelatedAnime(URI("https://anidb.net/anime/16165")),
+                    RelatedAnime(URI("https://anilist.co/anime/131520")),
+                    RelatedAnime(URI("https://anime-planet.com/anime/the-quintessential-quintuplets-movie")),
+                    RelatedAnime(URI("https://animecountdown.com/1577789")),
+                    RelatedAnime(URI("https://anisearch.com/anime/16091")),
+                    RelatedAnime(URI("https://kitsu.app/anime/44229")),
+                    RelatedAnime(URI("https://livechart.me/anime/10488")),
+                    RelatedAnime(URI("https://livechart.me/anime/11921")),
+                    RelatedAnime(URI("https://livechart.me/anime/3448")),
+                    RelatedAnime(URI("https://livechart.me/anime/9428")),
+                    RelatedAnime(URI("https://myanimelist.net/anime/48548")),
+                    RelatedAnime(URI("https://simkl.com/anime/1577789")),
                 ),
                 _tags = hashSetOf(
                     "america",
@@ -698,18 +702,42 @@ internal object TestAnimeRawObjects {
                 "pony canyon"
               ],
               "relatedAnime": [
-                "https://anidb.net/anime/16165",
-                "https://anilist.co/anime/131520",
-                "https://anime-planet.com/anime/the-quintessential-quintuplets-movie",
-                "https://animecountdown.com/1577789",
-                "https://anisearch.com/anime/16091",
-                "https://kitsu.app/anime/44229",
-                "https://livechart.me/anime/10488",
-                "https://livechart.me/anime/11921",
-                "https://livechart.me/anime/3448",
-                "https://livechart.me/anime/9428",
-                "https://myanimelist.net/anime/48548",
-                "https://simkl.com/anime/1577789"
+                {
+                  "uri": "https://anidb.net/anime/16165"
+                },
+                {
+                  "uri": "https://anilist.co/anime/131520"
+                },
+                {
+                  "uri": "https://anime-planet.com/anime/the-quintessential-quintuplets-movie"
+                },
+                {
+                  "uri": "https://animecountdown.com/1577789"
+                },
+                {
+                  "uri": "https://anisearch.com/anime/16091"
+                },
+                {
+                  "uri": "https://kitsu.app/anime/44229"
+                },
+                {
+                  "uri": "https://livechart.me/anime/10488"
+                },
+                {
+                  "uri": "https://livechart.me/anime/11921"
+                },
+                {
+                  "uri": "https://livechart.me/anime/3448"
+                },
+                {
+                  "uri": "https://livechart.me/anime/9428"
+                },
+                {
+                  "uri": "https://myanimelist.net/anime/48548"
+                },
+                {
+                  "uri": "https://simkl.com/anime/1577789"
+                }
               ],
               "tags": [
                 "america",
@@ -740,7 +768,7 @@ internal object TestAnimeRawObjects {
         """.trimIndent()
 
         val serializedMinified = """
-            {"sources":["https://anidb.net/anime/18603","https://anilist.co/anime/177191","https://anime-planet.com/anime/the-quintessential-quintuplets-specials-2","https://anisearch.com/anime/19242","https://kitsu.app/anime/48807","https://livechart.me/anime/12646","https://myanimelist.net/anime/58755","https://simkl.com/anime/2448488"],"title":"5-toubun no Hanayome*","type":"SPECIAL","episodes":2,"status":"FINISHED","animeSeason":{"season":"FALL","year":2024},"picture":"https://cdn.myanimelist.net/images/anime/1915/145336.jpg","thumbnail":"https://cdn.myanimelist.net/images/anime/1915/145336t.jpg","duration":{"value":1440,"unit":"SECONDS"},"scores":[{"hostname":"anidb.net","value":6.63,"range":{"minInclusive":1,"maxInclusive":10}},{"hostname":"anilist.co","value":75,"range":{"minInclusive":1,"maxInclusive":100}},{"hostname":"anime-planet.com","value":3.845,"range":{"minInclusive":0.5,"maxInclusive":5.0}},{"hostname":"anisearch.com","value":3.9,"range":{"minInclusive":0.1,"maxInclusive":5}},{"hostname":"kitsu.app","value":76.95,"range":{"minInclusive":1,"maxInclusive":100}},{"hostname":"livechart.me","value":8.35,"range":{"minInclusive":1,"maxInclusive":10}},{"hostname":"myanimelist.net","value":8.62,"range":{"minInclusive":1,"maxInclusive":10}},{"hostname":"simkl.com","value":7.9,"range":{"minInclusive":1,"maxInclusive":10}}],"synonyms":["5-toubun no Hanayome *","Go-Toubun no Hanayome *","Go-Tōbun no Hanayome *","Go-toubun no Hanayome *","The Quintessential Quintuplets *","The Quintessential Quintuplets Movie*","The Quintessential Quintuplets Special 2","The Quintessential Quintuplets Specials 2","The Quintessential Quintuplets*","The Quintessential Quintuplets: Honeymoon Arc","五等分の花嫁*","五等分の花嫁＊","五等分的新娘＊"],"studios":["bibury animation studios"],"producers":["dax production","nichion","pony canyon"],"relatedAnime":["https://anidb.net/anime/16165","https://anilist.co/anime/131520","https://anime-planet.com/anime/the-quintessential-quintuplets-movie","https://animecountdown.com/1577789","https://anisearch.com/anime/16091","https://kitsu.app/anime/44229","https://livechart.me/anime/10488","https://livechart.me/anime/11921","https://livechart.me/anime/3448","https://livechart.me/anime/9428","https://myanimelist.net/anime/48548","https://simkl.com/anime/1577789"],"tags":["america","based on a manga","comedy","drama","ensemble cast","female harem","harem","heterosexual","japanese production","language barrier","male protagonist","marriage","new","predominantly female cast","present","primarily female cast","romance","school","sequel","shounen","siblings","time","twins"]}
+            {"sources":["https://anidb.net/anime/18603","https://anilist.co/anime/177191","https://anime-planet.com/anime/the-quintessential-quintuplets-specials-2","https://anisearch.com/anime/19242","https://kitsu.app/anime/48807","https://livechart.me/anime/12646","https://myanimelist.net/anime/58755","https://simkl.com/anime/2448488"],"title":"5-toubun no Hanayome*","type":"SPECIAL","episodes":2,"status":"FINISHED","animeSeason":{"season":"FALL","year":2024},"picture":"https://cdn.myanimelist.net/images/anime/1915/145336.jpg","thumbnail":"https://cdn.myanimelist.net/images/anime/1915/145336t.jpg","duration":{"value":1440,"unit":"SECONDS"},"scores":[{"hostname":"anidb.net","value":6.63,"range":{"minInclusive":1,"maxInclusive":10}},{"hostname":"anilist.co","value":75,"range":{"minInclusive":1,"maxInclusive":100}},{"hostname":"anime-planet.com","value":3.845,"range":{"minInclusive":0.5,"maxInclusive":5.0}},{"hostname":"anisearch.com","value":3.9,"range":{"minInclusive":0.1,"maxInclusive":5}},{"hostname":"kitsu.app","value":76.95,"range":{"minInclusive":1,"maxInclusive":100}},{"hostname":"livechart.me","value":8.35,"range":{"minInclusive":1,"maxInclusive":10}},{"hostname":"myanimelist.net","value":8.62,"range":{"minInclusive":1,"maxInclusive":10}},{"hostname":"simkl.com","value":7.9,"range":{"minInclusive":1,"maxInclusive":10}}],"synonyms":["5-toubun no Hanayome *","Go-Toubun no Hanayome *","Go-Tōbun no Hanayome *","Go-toubun no Hanayome *","The Quintessential Quintuplets *","The Quintessential Quintuplets Movie*","The Quintessential Quintuplets Special 2","The Quintessential Quintuplets Specials 2","The Quintessential Quintuplets*","The Quintessential Quintuplets: Honeymoon Arc","五等分の花嫁*","五等分の花嫁＊","五等分的新娘＊"],"studios":["bibury animation studios"],"producers":["dax production","nichion","pony canyon"],"relatedAnime":[{"uri":"https://anidb.net/anime/16165"},{"uri":"https://anilist.co/anime/131520"},{"uri":"https://anime-planet.com/anime/the-quintessential-quintuplets-movie"},{"uri":"https://animecountdown.com/1577789"},{"uri":"https://anisearch.com/anime/16091"},{"uri":"https://kitsu.app/anime/44229"},{"uri":"https://livechart.me/anime/10488"},{"uri":"https://livechart.me/anime/11921"},{"uri":"https://livechart.me/anime/3448"},{"uri":"https://livechart.me/anime/9428"},{"uri":"https://myanimelist.net/anime/48548"},{"uri":"https://simkl.com/anime/1577789"}],"tags":["america","based on a manga","comedy","drama","ensemble cast","female harem","harem","heterosexual","japanese production","language barrier","male protagonist","marriage","new","predominantly female cast","present","primarily female cast","romance","school","sequel","shounen","siblings","time","twins"]}
         """.trimIndent()
     }
 }
@@ -820,7 +848,7 @@ internal object TestAnimeObjects {
                     "vap",
                 ),
                 relatedAnime = hashSetOf(
-                    URI("https://myanimelist.net/anime/2994"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/2994")),
                 ),
                 tags = hashSetOf(
                     "psychological",
@@ -861,7 +889,9 @@ internal object TestAnimeObjects {
                 "vap"
               ],
               "relatedAnime": [
-                "https://myanimelist.net/anime/2994"
+                {
+                  "uri": "https://myanimelist.net/anime/2994"
+                }
               ],
               "tags": [
                 "psychological",
@@ -873,7 +903,7 @@ internal object TestAnimeObjects {
         """.trimIndent()
 
         val serializedMinified = """
-            {"sources":["https://myanimelist.net/anime/1535"],"title":"Death Note","type":"TV","episodes":37,"status":"FINISHED","animeSeason":{"season":"FALL"},"picture":"https://cdn.myanimelist.net/images/anime/1079/138100.jpg","thumbnail":"https://cdn.myanimelist.net/images/anime/1079/138100t.jpg","synonyms":["DN","デスノート"],"studios":["madhouse"],"producers":["D.N. Dream Partners","nippon television network","shueisha","vap"],"relatedAnime":["https://myanimelist.net/anime/2994"],"tags":["psychological","shounen","supernatural","suspense"]}
+            {"sources":["https://myanimelist.net/anime/1535"],"title":"Death Note","type":"TV","episodes":37,"status":"FINISHED","animeSeason":{"season":"FALL"},"picture":"https://cdn.myanimelist.net/images/anime/1079/138100.jpg","thumbnail":"https://cdn.myanimelist.net/images/anime/1079/138100t.jpg","synonyms":["DN","デスノート"],"studios":["madhouse"],"producers":["D.N. Dream Partners","nippon television network","shueisha","vap"],"relatedAnime":[{"uri":"https://myanimelist.net/anime/2994"}],"tags":["psychological","shounen","supernatural","suspense"]}
         """.trimIndent()
     }
 
@@ -919,7 +949,7 @@ internal object TestAnimeObjects {
                     "pony canyon",
                 ),
                 relatedAnime = hashSetOf(
-                    URI("https://myanimelist.net/anime/48548"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/48548")),
                 ),
                 tags = hashSetOf(
                     "comedy",
@@ -967,7 +997,9 @@ internal object TestAnimeObjects {
                 "pony canyon"
               ],
               "relatedAnime": [
-                "https://myanimelist.net/anime/48548"
+                {
+                  "uri": "https://myanimelist.net/anime/48548"
+                }
               ],
               "tags": [
                 "comedy",
@@ -980,7 +1012,7 @@ internal object TestAnimeObjects {
         """.trimIndent()
 
         val serializedMinified = """
-            {"sources":["https://myanimelist.net/anime/58755"],"title":"5-toubun no Hanayome*","type":"SPECIAL","episodes":2,"status":"FINISHED","animeSeason":{"season":"FALL","year":2024},"picture":"https://cdn.myanimelist.net/images/anime/1915/145336.jpg","thumbnail":"https://cdn.myanimelist.net/images/anime/1915/145336t.jpg","duration":{"value":1440,"unit":"SECONDS"},"score":{"arithmeticGeometricMean":7.44,"arithmeticMean":7.44,"median":7.44},"synonyms":["The Quintessential Quintuplets*","五等分の花嫁*"],"studios":["bibury animation studios"],"producers":["dax production","nichion","pony canyon"],"relatedAnime":["https://myanimelist.net/anime/48548"],"tags":["comedy","harem","romance","school","shounen"]}
+            {"sources":["https://myanimelist.net/anime/58755"],"title":"5-toubun no Hanayome*","type":"SPECIAL","episodes":2,"status":"FINISHED","animeSeason":{"season":"FALL","year":2024},"picture":"https://cdn.myanimelist.net/images/anime/1915/145336.jpg","thumbnail":"https://cdn.myanimelist.net/images/anime/1915/145336t.jpg","duration":{"value":1440,"unit":"SECONDS"},"score":{"arithmeticGeometricMean":7.44,"arithmeticMean":7.44,"median":7.44},"synonyms":["The Quintessential Quintuplets*","五等分の花嫁*"],"studios":["bibury animation studios"],"producers":["dax production","nichion","pony canyon"],"relatedAnime":[{"uri":"https://myanimelist.net/anime/48548"}],"tags":["comedy","harem","romance","school","shounen"]}
         """.trimIndent()
     }
 
@@ -1045,18 +1077,18 @@ internal object TestAnimeObjects {
                     "tbs",
                 ),
                 relatedAnime = hashSetOf(
-                    URI("https://anidb.net/anime/16165"),
-                    URI("https://anilist.co/anime/131520"),
-                    URI("https://anime-planet.com/anime/the-quintessential-quintuplets-movie"),
-                    URI("https://animecountdown.com/1577789"),
-                    URI("https://anisearch.com/anime/16091"),
-                    URI("https://kitsu.app/anime/44229"),
-                    URI("https://livechart.me/anime/10488"),
-                    URI("https://livechart.me/anime/11921"),
-                    URI("https://livechart.me/anime/3448"),
-                    URI("https://livechart.me/anime/9428"),
-                    URI("https://myanimelist.net/anime/48548"),
-                    URI("https://simkl.com/anime/1577789"),
+                    RelatedAnime(URI("https://anidb.net/anime/16165")),
+                    RelatedAnime(URI("https://anilist.co/anime/131520")),
+                    RelatedAnime(URI("https://anime-planet.com/anime/the-quintessential-quintuplets-movie")),
+                    RelatedAnime(URI("https://animecountdown.com/1577789")),
+                    RelatedAnime(URI("https://anisearch.com/anime/16091")),
+                    RelatedAnime(URI("https://kitsu.app/anime/44229")),
+                    RelatedAnime(URI("https://livechart.me/anime/10488")),
+                    RelatedAnime(URI("https://livechart.me/anime/11921")),
+                    RelatedAnime(URI("https://livechart.me/anime/3448")),
+                    RelatedAnime(URI("https://livechart.me/anime/9428")),
+                    RelatedAnime(URI("https://myanimelist.net/anime/48548")),
+                    RelatedAnime(URI("https://simkl.com/anime/1577789")),
                 ),
                 tags = hashSetOf(
                     "america",
@@ -1142,18 +1174,42 @@ internal object TestAnimeObjects {
                 "tbs"
               ],
               "relatedAnime": [
-                "https://anidb.net/anime/16165",
-                "https://anilist.co/anime/131520",
-                "https://anime-planet.com/anime/the-quintessential-quintuplets-movie",
-                "https://animecountdown.com/1577789",
-                "https://anisearch.com/anime/16091",
-                "https://kitsu.app/anime/44229",
-                "https://livechart.me/anime/10488",
-                "https://livechart.me/anime/11921",
-                "https://livechart.me/anime/3448",
-                "https://livechart.me/anime/9428",
-                "https://myanimelist.net/anime/48548",
-                "https://simkl.com/anime/1577789"
+                {
+                  "uri": "https://anidb.net/anime/16165"
+                },
+                {
+                  "uri": "https://anilist.co/anime/131520"
+                },
+                {
+                  "uri": "https://anime-planet.com/anime/the-quintessential-quintuplets-movie"
+                },
+                {
+                  "uri": "https://animecountdown.com/1577789"
+                },
+                {
+                  "uri": "https://anisearch.com/anime/16091"
+                },
+                {
+                  "uri": "https://kitsu.app/anime/44229"
+                },
+                {
+                  "uri": "https://livechart.me/anime/10488"
+                },
+                {
+                  "uri": "https://livechart.me/anime/11921"
+                },
+                {
+                  "uri": "https://livechart.me/anime/3448"
+                },
+                {
+                  "uri": "https://livechart.me/anime/9428"
+                },
+                {
+                  "uri": "https://myanimelist.net/anime/48548"
+                },
+                {
+                  "uri": "https://simkl.com/anime/1577789"
+                }
               ],
               "tags": [
                 "america",
@@ -1184,7 +1240,7 @@ internal object TestAnimeObjects {
         """.trimIndent()
 
         val serializedMinified = """
-            {"sources":["https://anidb.net/anime/18603","https://anilist.co/anime/177191","https://anime-planet.com/anime/the-quintessential-quintuplets-specials-2","https://anisearch.com/anime/19242","https://kitsu.app/anime/48807","https://livechart.me/anime/12646","https://myanimelist.net/anime/58755","https://simkl.com/anime/2448488"],"title":"5-toubun no Hanayome*","type":"SPECIAL","episodes":2,"status":"FINISHED","animeSeason":{"season":"FALL","year":2024},"picture":"https://cdn.myanimelist.net/images/anime/1915/145336.jpg","thumbnail":"https://cdn.myanimelist.net/images/anime/1915/145336t.jpg","duration":{"value":1440,"unit":"SECONDS"},"score":{"arithmeticGeometricMean":7.616175305477198,"arithmeticMean":7.624601113172541,"median":7.7272727272727275},"synonyms":["5-toubun no Hanayome *","Go-Toubun no Hanayome *","Go-Tōbun no Hanayome *","Go-toubun no Hanayome *","The Quintessential Quintuplets *","The Quintessential Quintuplets Movie*","The Quintessential Quintuplets Special 2","The Quintessential Quintuplets Specials 2","The Quintessential Quintuplets*","The Quintessential Quintuplets: Honeymoon Arc","五等分の花嫁*","五等分の花嫁＊","五等分的新娘＊"],"studios":["bibury animation studios"],"producers":["dax production","nichion","pony canyon","tbs"],"relatedAnime":["https://anidb.net/anime/16165","https://anilist.co/anime/131520","https://anime-planet.com/anime/the-quintessential-quintuplets-movie","https://animecountdown.com/1577789","https://anisearch.com/anime/16091","https://kitsu.app/anime/44229","https://livechart.me/anime/10488","https://livechart.me/anime/11921","https://livechart.me/anime/3448","https://livechart.me/anime/9428","https://myanimelist.net/anime/48548","https://simkl.com/anime/1577789"],"tags":["america","based on a manga","comedy","drama","ensemble cast","female harem","harem","heterosexual","japanese production","language barrier","male protagonist","marriage","new","predominantly female cast","present","primarily female cast","romance","school","sequel","shounen","siblings","time","twins"]}
+            {"sources":["https://anidb.net/anime/18603","https://anilist.co/anime/177191","https://anime-planet.com/anime/the-quintessential-quintuplets-specials-2","https://anisearch.com/anime/19242","https://kitsu.app/anime/48807","https://livechart.me/anime/12646","https://myanimelist.net/anime/58755","https://simkl.com/anime/2448488"],"title":"5-toubun no Hanayome*","type":"SPECIAL","episodes":2,"status":"FINISHED","animeSeason":{"season":"FALL","year":2024},"picture":"https://cdn.myanimelist.net/images/anime/1915/145336.jpg","thumbnail":"https://cdn.myanimelist.net/images/anime/1915/145336t.jpg","duration":{"value":1440,"unit":"SECONDS"},"score":{"arithmeticGeometricMean":7.616175305477198,"arithmeticMean":7.624601113172541,"median":7.7272727272727275},"synonyms":["5-toubun no Hanayome *","Go-Toubun no Hanayome *","Go-Tōbun no Hanayome *","Go-toubun no Hanayome *","The Quintessential Quintuplets *","The Quintessential Quintuplets Movie*","The Quintessential Quintuplets Special 2","The Quintessential Quintuplets Specials 2","The Quintessential Quintuplets*","The Quintessential Quintuplets: Honeymoon Arc","五等分の花嫁*","五等分の花嫁＊","五等分的新娘＊"],"studios":["bibury animation studios"],"producers":["dax production","nichion","pony canyon","tbs"],"relatedAnime":[{"uri":"https://anidb.net/anime/16165"},{"uri":"https://anilist.co/anime/131520"},{"uri":"https://anime-planet.com/anime/the-quintessential-quintuplets-movie"},{"uri":"https://animecountdown.com/1577789"},{"uri":"https://anisearch.com/anime/16091"},{"uri":"https://kitsu.app/anime/44229"},{"uri":"https://livechart.me/anime/10488"},{"uri":"https://livechart.me/anime/11921"},{"uri":"https://livechart.me/anime/3448"},{"uri":"https://livechart.me/anime/9428"},{"uri":"https://myanimelist.net/anime/48548"},{"uri":"https://simkl.com/anime/1577789"}],"tags":["america","based on a manga","comedy","drama","ensemble cast","female harem","harem","heterosexual","japanese production","language barrier","male protagonist","marriage","new","predominantly female cast","present","primarily female cast","romance","school","sequel","shounen","siblings","time","twins"]}
         """.trimIndent()
     }
 }
diff --git a/core/src/test/kotlin/io/github/manamiproject/modb/core/anime/AnimeRawTest.kt b/core/src/test/kotlin/io/github/manamiproject/modb/core/anime/AnimeRawTest.kt
index 7580e1d8..ed8cd3f8 100644
--- a/core/src/test/kotlin/io/github/manamiproject/modb/core/anime/AnimeRawTest.kt
+++ b/core/src/test/kotlin/io/github/manamiproject/modb/core/anime/AnimeRawTest.kt
@@ -1,5 +1,6 @@
 package io.github.manamiproject.modb.core.anime
 
+import io.github.manamiproject.modb.core.anime.RelatedAnime
 import io.github.manamiproject.modb.core.TestAnimeRawObjects
 import io.github.manamiproject.modb.core.anime.AnimeSeason.Companion.UNKNOWN_YEAR
 import io.github.manamiproject.modb.core.anime.AnimeSeason.Season.*
@@ -5953,7 +5954,7 @@ internal class AnimeRawTest {
                         source,
                     ),
                     _relatedAnime = hashSetOf(
-                        source,
+                        RelatedAnime(source),
                     ),
                 )
 
@@ -5976,7 +5977,7 @@ internal class AnimeRawTest {
                         source,
                     ),
                     _relatedAnime = hashSetOf(
-                        source,
+                        RelatedAnime(source),
                     ),
                     activateChecks = false,
                 )
@@ -5986,7 +5987,7 @@ internal class AnimeRawTest {
                     source,
                 )
                 assertThat(result.relatedAnime).containsExactly(
-                    source,
+                    RelatedAnime(source),
                 )
             }
         }
@@ -6042,7 +6043,7 @@ internal class AnimeRawTest {
                 val anime = AnimeRaw(
                     _title =  "Death Note",
                     _relatedAnime = hashSetOf(
-                        source,
+                        RelatedAnime(source),
                     ),
                 )
 
@@ -6108,7 +6109,7 @@ internal class AnimeRawTest {
                 val anime = AnimeRaw(
                     _title =  "Death Note",
                     _relatedAnime = hashSetOf(
-                        source,
+                        RelatedAnime(source),
                     ),
                 )
 
@@ -6178,8 +6179,8 @@ internal class AnimeRawTest {
                 val anime = AnimeRaw(
                     _title = "test",
                     _relatedAnime = hashSetOf(
-                        URI("https://example.org/anime/1535"),
-                        URI("https://myanimelist.net/anime/1535"),
+                        RelatedAnime(URI("https://example.org/anime/1535")),
+                        RelatedAnime(URI("https://myanimelist.net/anime/1535")),
                     ),
                 )
 
@@ -6199,13 +6200,13 @@ internal class AnimeRawTest {
                 val result = AnimeRaw(
                     _title =  "Death Note",
                     _relatedAnime = hashSetOf(
-                        relatedAnime,
+                        RelatedAnime(relatedAnime),
                     ),
                 )
 
                 // then
                 assertThat(result.relatedAnime).containsExactly(
-                    relatedAnime,
+                    RelatedAnime(relatedAnime),
                 )
             }
 
@@ -6218,14 +6219,14 @@ internal class AnimeRawTest {
                 val result = AnimeRaw(
                     _title =  "Death Note",
                     _relatedAnime = hashSetOf(
-                        relatedAnime,
-                        relatedAnime,
+                        RelatedAnime(relatedAnime),
+                        RelatedAnime(relatedAnime),
                     ),
                 )
 
                 // then
                 assertThat(result.relatedAnime).containsExactly(
-                    relatedAnime,
+                    RelatedAnime(relatedAnime),
                 )
             }
 
@@ -6241,7 +6242,7 @@ internal class AnimeRawTest {
                         link,
                     ),
                     _relatedAnime = hashSetOf(
-                        link,
+                        RelatedAnime(link),
                     ),
                 )
 
@@ -6258,8 +6259,8 @@ internal class AnimeRawTest {
                         URI("https://myanimelist.net/anime/6351"),
                     ),
                     _relatedAnime = hashSetOf(
-                        URI("https://myanimelist.net/anime/2167"),
-                        URI("https://myanimelist.net/anime/6351"),
+                        RelatedAnime(URI("https://myanimelist.net/anime/2167")),
+                        RelatedAnime(URI("https://myanimelist.net/anime/6351")),
                     ),
                     activateChecks = false,
                 )
@@ -6287,7 +6288,7 @@ internal class AnimeRawTest {
 
                 // then
                 assertThat(anime.relatedAnime).containsExactly(
-                    relatedAnime,
+                    RelatedAnime(relatedAnime),
                 )
             }
 
@@ -6298,7 +6299,7 @@ internal class AnimeRawTest {
                 val anime = AnimeRaw(
                     _title =  "Death Note",
                     _relatedAnime = hashSetOf(
-                        relatedAnime,
+                        RelatedAnime(relatedAnime),
                     ),
                 )
 
@@ -6309,7 +6310,7 @@ internal class AnimeRawTest {
 
                 // then
                 assertThat(anime.relatedAnime).containsExactly(
-                    relatedAnime,
+                    RelatedAnime(relatedAnime),
                 )
             }
 
@@ -6352,7 +6353,7 @@ internal class AnimeRawTest {
 
                 // then
                 assertThat(anime.relatedAnime).containsExactly(
-                    relatedAnime,
+                    RelatedAnime(relatedAnime),
                 )
             }
 
@@ -6363,7 +6364,7 @@ internal class AnimeRawTest {
                 val anime = AnimeRaw(
                     _title =  "Death Note",
                     _relatedAnime = hashSetOf(
-                        relatedAnime,
+                        RelatedAnime(relatedAnime),
                     ),
                 )
 
@@ -6374,7 +6375,7 @@ internal class AnimeRawTest {
 
                 // then
                 assertThat(anime.relatedAnime).containsExactly(
-                    relatedAnime,
+                    RelatedAnime(relatedAnime),
                 )
             }
 
@@ -6397,6 +6398,122 @@ internal class AnimeRawTest {
             }
         }
 
+        @Nested
+        inner class AddRelatedAnimeWithRelationTests {
+
+            @Test
+            fun `add related anime including the kind of relation`() {
+                // given
+                val relatedAnime = RelatedAnime(URI("https://myanimelist.net/anime/2994"), "Summary")
+                val anime = AnimeRaw(
+                    _title =  "Death Note",
+                )
+
+                // when
+                anime.addRelatedAnime(relatedAnime)
+
+                // then
+                assertThat(anime.relatedAnime).containsExactly(
+                    RelatedAnime(URI("https://myanimelist.net/anime/2994"), "Summary"),
+                )
+            }
+
+            @Test
+            fun `an entry having a relation replaces an entry for the same link without relation`() {
+                // given
+                val anime = AnimeRaw(
+                    _title =  "Death Note",
+                    _relatedAnime = hashSetOf(
+                        RelatedAnime(URI("https://myanimelist.net/anime/2994")),
+                    ),
+                )
+
+                // when
+                anime.addRelatedAnime(RelatedAnime(URI("https://myanimelist.net/anime/2994"), "Summary"))
+
+                // then
+                assertThat(anime.relatedAnime).containsExactly(
+                    RelatedAnime(URI("https://myanimelist.net/anime/2994"), "Summary"),
+                )
+            }
+
+            @Test
+            fun `an entry without relation doesn't replace an entry for the same link having a relation`() {
+                // given
+                val anime = AnimeRaw(
+                    _title =  "Death Note",
+                    _relatedAnime = hashSetOf(
+                        RelatedAnime(URI("https://myanimelist.net/anime/2994"), "Summary"),
+                    ),
+                )
+
+                // when
+                anime.addRelatedAnime(URI("https://myanimelist.net/anime/2994"))
+
+                // then
+                assertThat(anime.relatedAnime).containsExactly(
+                    RelatedAnime(URI("https://myanimelist.net/anime/2994"), "Summary"),
+                )
+            }
+
+            @Test
+            fun `keeps only one entry per link`() {
+                // when
+                val anime = AnimeRaw(
+                    _title =  "Death Note",
+                    _relatedAnime = hashSetOf(
+                        RelatedAnime(URI("https://myanimelist.net/anime/2994"), "Summary"),
+                        RelatedAnime(URI("https://myanimelist.net/anime/2994"), "Other"),
+                    ),
+                )
+
+                // then
+                assertThat(anime.relatedAnime).hasSize(1)
+            }
+
+            @Test
+            fun `cannot add a related anime having a relation if the link is already part of the sources`() {
+                // given
+                val link = URI("https://myanimelist.net/anime/1535")
+                val anime = AnimeRaw(
+                    _title =  "Death Note",
+                    _sources = hashSetOf(
+                        link,
+                    ),
+                )
+
+                // when
+                anime.addRelatedAnime(RelatedAnime(link, "Sequel"))
+
+                // then
+                assertThat(anime.relatedAnime).isEmpty()
+            }
+
+            @Test
+            fun `merging keeps the kind of relation`() {
+                // given
+                val anime = AnimeRaw(
+                    _title =  "Death Note",
+                    _sources = hashSetOf(URI("https://myanimelist.net/anime/1535")),
+                    _relatedAnime = hashSetOf(RelatedAnime(URI("https://myanimelist.net/anime/2994"), "Summary")),
+                )
+                val other = AnimeRaw(
+                    _title =  "Death Note",
+                    _sources = hashSetOf(URI("https://anilist.co/anime/1535")),
+                    _relatedAnime = hashSetOf(RelatedAnime(URI("https://anilist.co/anime/2994"), "SUMMARY")),
+                )
+
+                // when
+                val result = anime.mergeWith(other)
+
+                // then
+                assertThat(result.relatedAnime).containsExactlyInAnyOrder(
+                    RelatedAnime(URI("https://myanimelist.net/anime/2994"), "Summary"),
+                    RelatedAnime(URI("https://anilist.co/anime/2994"), "SUMMARY"),
+                )
+            }
+        }
+
         @Nested
         inner class RemoveRelationIfTests {
 
@@ -6407,7 +6524,7 @@ internal class AnimeRawTest {
                 val anime = AnimeRaw(
                     _title =  "Death Note",
                     _relatedAnime = hashSetOf(
-                        relatedAnime,
+                        RelatedAnime(relatedAnime),
                     ),
                 )
 
@@ -6425,7 +6542,7 @@ internal class AnimeRawTest {
                 val anime = AnimeRaw(
                     _title =  "Death Note",
                     _relatedAnime = hashSetOf(
-                        relatedAnime,
+                        RelatedAnime(relatedAnime),
                     ),
                 )
 
@@ -6434,7 +6551,7 @@ internal class AnimeRawTest {
 
                 // then
                 assertThat(anime.relatedAnime).containsExactly(
-                    relatedAnime,
+                    RelatedAnime(relatedAnime),
                 )
             }
         }
@@ -6984,14 +7101,14 @@ internal class AnimeRawTest {
             val a = AnimeRaw(
                 _title =  title,
                 _relatedAnime = hashSetOf(
-                    URI("https://myanimelist.net/anime/2994"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/2994")),
                 ),
             )
 
             val b = AnimeRaw(
                 _title =  title,
                 _relatedAnime = hashSetOf(
-                    URI("https://myanimelist.net/anime/2994"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/2994")),
                 ),
             )
 
@@ -7010,15 +7127,15 @@ internal class AnimeRawTest {
             val a = AnimeRaw(
                 _title =  title,
                 _relatedAnime = hashSetOf(
-                    URI("https://myanimelist.net/anime/2994"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/2994")),
                 ),
             )
 
             val b = AnimeRaw(
                 _title =  title,
                 _relatedAnime = hashSetOf(
-                    URI("https://myanimelist.net/anime/2994"),
-                    URI("http://anilist.co/anime/2994"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/2994")),
+                    RelatedAnime(URI("http://anilist.co/anime/2994")),
                 ),
             )
 
@@ -7512,7 +7629,7 @@ internal class AnimeRawTest {
                     URI("https://myanimelist.net/anime/1535"),
                 ),
                 _relatedAnime = hashSetOf(
-                    URI("https://myanimelist.net/anime/2994"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/2994")),
                 ),
             )
 
@@ -7522,8 +7639,8 @@ internal class AnimeRawTest {
                     URI("https://anidb.net/anime/4563"),
                 ),
                 _relatedAnime = hashSetOf(
-                    URI("https://anidb.net/anime/8146"),
-                    URI("https://anidb.net/anime/8147"),
+                    RelatedAnime(URI("https://anidb.net/anime/8146")),
+                    RelatedAnime(URI("https://anidb.net/anime/8147")),
                 ),
             )
 
@@ -7536,9 +7653,9 @@ internal class AnimeRawTest {
                 URI("https://myanimelist.net/anime/1535"),
             )
             assertThat(result.relatedAnime).containsExactlyInAnyOrder(
-                URI("https://anidb.net/anime/8146"),
-                URI("https://anidb.net/anime/8147"),
-                URI("https://myanimelist.net/anime/2994"),
+                RelatedAnime(URI("https://anidb.net/anime/8146")),
+                RelatedAnime(URI("https://anidb.net/anime/8147")),
+                RelatedAnime(URI("https://myanimelist.net/anime/2994")),
             )
         }
 
@@ -8904,8 +9021,8 @@ internal class AnimeRawTest {
                         URI("https://myanimelist.net/anime/6351"),
                     ),
                     _relatedAnime = hashSetOf(
-                        URI("https://myanimelist.net/anime/2167"),
-                        URI("https://myanimelist.net/anime/6351"),
+                        RelatedAnime(URI("https://myanimelist.net/anime/2167")),
+                        RelatedAnime(URI("https://myanimelist.net/anime/6351")),
                     ),
                     activateChecks = false,
                 )
@@ -8933,7 +9050,9 @@ internal class AnimeRawTest {
                       "studios": [],
                       "producers": [],
                       "relatedAnime": [
-                        "https://myanimelist.net/anime/2167"
+                        {
+                          "uri": "https://myanimelist.net/anime/2167"
+                        }
                       ],
                       "tags": []
                     }
@@ -9066,7 +9185,7 @@ internal class AnimeRawTest {
                         source,
                     ),
                     _relatedAnime = hashSetOf(
-                        source,
+                        RelatedAnime(source),
                     ),
                     activateChecks = false,
                 )
diff --git a/core/src/test/kotlin/io/github/manamiproject/modb/core/anime/RelatedAnimeTest.kt b/core/src/test/kotlin/io/github/manamiproject/modb/core/anime/RelatedAnimeTest.kt
new file mode 100644
index 00000000..93a33d99
--- /dev/null
+++ b/core/src/test/kotlin/io/github/manamiproject/modb/core/anime/RelatedAnimeTest.kt
@@ -0,0 +1,98 @@
+package io.github.manamiproject.modb.core.anime
+
+import org.assertj.core.api.Assertions.assertThat
+import org.junit.jupiter.api.Nested
+import org.junit.jupiter.params.ParameterizedTest
+import org.junit.jupiter.params.provider.ValueSource
+import java.net.URI
+import kotlin.test.Test
+
+internal class RelatedAnimeTest {
+
+    @Nested
+    inner class OfTests {
+
+        @Test
+        fun `keeps the label as the metadata provider writes it`() {
+            // when
+            val result = RelatedAnime.of(URI("https://myanimelist.net/anime/2994"), "Side Story")
+
+            // then
+            assertThat(result).isEqualTo(RelatedAnime(URI("https://myanimelist.net/anime/2994"), "Side Story"))
+        }
+
+        @Test
+        fun `trims the label and normalizes whitespaces`() {
+            // when
+            val result = RelatedAnime.of(URI("https://anidb.net/anime/405"), "\n\t Side story \n")
+
+            // then
+            assertThat(result.relation).isEqualTo("Side story")
+        }
+
+        @ParameterizedTest
+        @ValueSource(strings = ["", "   ", "\n", "\t"])
+        fun `blank label results in null`(value: String) {
+            // when
+            val result = RelatedAnime.of(URI("https://anidb.net/anime/405"), value)
+
+            // then
+            assertThat(result.relation).isNull()
+        }
+
+        @Test
+        fun `null label results in null`() {
+            // when
+            val result = RelatedAnime.of(URI("https://anidb.net/anime/405"), null)
+
+            // then
+            assertThat(result.relation).isNull()
+        }
+    }
+
+    @Nested
+    inner class CompareToTests {
+
+        @Test
+        fun `sorts by link first and by relation second`() {
+            // given
+            val list = listOf(
+                RelatedAnime(URI("https://myanimelist.net/anime/2"), "Sequel"),
+                RelatedAnime(URI("https://myanimelist.net/anime/1"), "Sequel"),
+                RelatedAnime(URI("https://myanimelist.net/anime/1")),
+            )
+
+            // when
+            val result = list.sorted()
+
+            // then
+            assertThat(result).containsExactly(
+                RelatedAnime(URI("https://myanimelist.net/anime/1")),
+                RelatedAnime(URI("https://myanimelist.net/anime/1"), "Sequel"),
+                RelatedAnime(URI("https://myanimelist.net/anime/2"), "Sequel"),
+            )
+        }
+    }
+
+    @Nested
+    inner class ToStringTests {
+
+        @Test
+        fun `only the link if there is no relation`() {
+            // when
+            val result = RelatedAnime(URI("https://myanimelist.net/anime/2994")).toString()
+
+            // then
+            assertThat(result).isEqualTo("https://myanimelist.net/anime/2994")
+        }
+
+        @Test
+        fun `link and relation in brackets`() {
+            // when
+            val result = RelatedAnime(URI("https://myanimelist.net/anime/2994"), "Summary").toString()
+
+            // then
+            assertThat(result).isEqualTo("https://myanimelist.net/anime/2994 (Summary)")
+        }
+    }
+}
diff --git a/core/src/test/kotlin/io/github/manamiproject/modb/core/extractor/DescendantTest.kt b/core/src/test/kotlin/io/github/manamiproject/modb/core/extractor/DescendantTest.kt
index 2c8eab3f..58c2aede 100644
--- a/core/src/test/kotlin/io/github/manamiproject/modb/core/extractor/DescendantTest.kt
+++ b/core/src/test/kotlin/io/github/manamiproject/modb/core/extractor/DescendantTest.kt
@@ -29,7 +29,7 @@ internal class DescendantTest {
         }
 
         @ParameterizedTest
-        @ValueSource(strings = ["@attr", "text()", "node()"])
+        @ValueSource(strings = ["@attr", "text()", "node()", "html()"])
         fun `only contains terminating child`(input: String) {
             // given
             val obj = Descendant(input)
@@ -47,7 +47,7 @@ internal class DescendantTest {
         }
 
         @ParameterizedTest
-        @ValueSource(strings = ["@attr", "text()", "node()"])
+        @ValueSource(strings = ["@attr", "text()", "node()", "html()"])
         fun `single descendant followed by terminating child`(input: String) {
             // given
             val obj = Descendant("//div/$input")
@@ -65,7 +65,7 @@ internal class DescendantTest {
         }
 
         @ParameterizedTest
-        @ValueSource(strings = ["@attr", "text()", "node()"])
+        @ValueSource(strings = ["@attr", "text()", "node()", "html()"])
         fun `contains terminating child after additional child and filter`(input: String) {
             // given
             val obj = Descendant("//div/span[@attr='test']/$input")
@@ -100,7 +100,7 @@ internal class DescendantTest {
         }
 
         @ParameterizedTest
-        @ValueSource(strings = ["@attr", "text()", "node()"])
+        @ValueSource(strings = ["@attr", "text()", "node()", "html()"])
         fun `empty if only contains terminating child`(input: String) {
             // given
             val obj = Descendant(input)
diff --git a/core/src/test/kotlin/io/github/manamiproject/modb/core/extractor/LabelledLinksTest.kt b/core/src/test/kotlin/io/github/manamiproject/modb/core/extractor/LabelledLinksTest.kt
new file mode 100644
index 00000000..d0c44f3e
--- /dev/null
+++ b/core/src/test/kotlin/io/github/manamiproject/modb/core/extractor/LabelledLinksTest.kt
@@ -0,0 +1,133 @@
+package io.github.manamiproject.modb.core.extractor
+
+import kotlinx.coroutines.test.runTest
+import org.assertj.core.api.Assertions.assertThat
+import org.junit.jupiter.api.Nested
+import kotlin.test.Test
+
+internal class LabelledLinksTest {
+
+    @Nested
+    inner class HtmlTerminatingChildTests {
+
+        private val html = """
+            <html><body>
+              <div class="entry"><a href="/anime/1">One</a><span class="type">Sequel</span></div>
+              <div class="entry"><a href="/anime/2">Two</a></div>
+            </body></html>
+        """.trimIndent()
+
+        @Test
+        fun `html() returns the html of each element using the css selector based extractor`() {
+            runTest {
+                // when
+                val result = JsoupCssSelectorDataExtractor.extract(html, mapOf(
+                    "entries" to "//div[@class='entry']/html()",
+                ))
+
+                // then
+                val entries = result.listNotNull<String>("entries")
+                assertThat(entries).hasSize(2)
+                assertThat(entries.first()).contains("href=\"/anime/1\"", "Sequel")
+                assertThat(entries.last()).contains("href=\"/anime/2\"").doesNotContain("Sequel")
+            }
+        }
+
+        @Test
+        fun `html() returns the html of each element using the xpath based extractor`() {
+            runTest {
+                // when
+                val result = JsoupXPathDataExtractor.extract(html, mapOf(
+                    "entries" to "//div[@class='entry']/html()",
+                ))
+
+                // then
+                val entries = result.listNotNull<String>("entries")
+                assertThat(entries).hasSize(2)
+                assertThat(entries.first()).contains("href=\"/anime/1\"", "Sequel")
+                assertThat(entries.last()).contains("href=\"/anime/2\"").doesNotContain("Sequel")
+            }
+        }
+    }
+
+    @Nested
+    inner class ExtractLabelledLinksTests {
+
+        @Test
+        fun `extracts label and links per snippet`() {
+            runTest {
+                // given
+                val snippets = listOf(
+                    """<div><a href="/anime/1">One</a><a href="/anime/2">Two</a><span class="type">Side Story</span></div>""",
+                    """<div><a href="/anime/3">Three</a><span class="type">Sequel</span></div>""",
+                )
+
+                // when
+                val result = XmlDataExtractor.extractLabelledLinks(
+                    snippets = snippets,
+                    labelSelector = "//span[@class='type']/text()",
+                    linkSelector = "//a/@href",
+                )
+
+                // then
+                assertThat(result).containsExactly(
+                    LabelledLinks("Side Story", listOf("/anime/1", "/anime/2")),
+                    LabelledLinks("Sequel", listOf("/anime/3")),
+                )
+            }
+        }
+
+        @Test
+        fun `label is null if the snippet doesn't contain one`() {
+            runTest {
+                // when
+                val result = XmlDataExtractor.extractLabelledLinks(
+                    snippets = listOf("""<div><a href="/anime/1">One</a></div>"""),
+                    labelSelector = "//span[@class='type']/text()",
+                    linkSelector = "//a/@href",
+                )
+
+                // then
+                assertThat(result).containsExactly(
+                    LabelledLinks(null, listOf("/anime/1")),
+                )
+            }
+        }
+
+        @Test
+        fun `snippets without links are skipped`() {
+            runTest {
+                // when
+                val result = XmlDataExtractor.extractLabelledLinks(
+                    snippets = listOf("""<div><span class="type">Sequel</span></div>"""),
+                    labelSelector = "//span[@class='type']/text()",
+                    linkSelector = "//a/@href",
+                )
+
+                // then
+                assertThat(result).isEmpty()
+            }
+        }
+
+        @Test
+        fun `table rows are parsed correctly if they are wrapped`() {
+            runTest {
+                // given
+                val row = """<tr><td class="label">Side Story</td><td><a href="/anime/1">One</a></td></tr>"""
+
+                // when
+                val result = XmlDataExtractor.extractLabelledLinks(
+                    snippets = listOf(row),
+                    labelSelector = "//td[@class='label']/text()",
+                    linkSelector = "//a/@href",
+                    wrap = WRAP_TABLE_ROW,
+                )
+
+                // then
+                assertThat(result).containsExactly(
+                    LabelledLinks("Side Story", listOf("/anime/1")),
+                )
+            }
+        }
+    }
+}
diff --git a/core/src/test/kotlin/io/github/manamiproject/modb/core/json/AnimeRawAdapterTest.kt b/core/src/test/kotlin/io/github/manamiproject/modb/core/json/AnimeRawAdapterTest.kt
index 89abd361..cbe6ab23 100644
--- a/core/src/test/kotlin/io/github/manamiproject/modb/core/json/AnimeRawAdapterTest.kt
+++ b/core/src/test/kotlin/io/github/manamiproject/modb/core/json/AnimeRawAdapterTest.kt
@@ -1,5 +1,6 @@
 package io.github.manamiproject.modb.core.json
 
+import io.github.manamiproject.modb.core.anime.RelatedAnime
 import com.squareup.moshi.JsonDataException
 import io.github.manamiproject.modb.core.TestAnimeRawObjects
 import io.github.manamiproject.modb.test.exceptionExpected
@@ -1577,7 +1578,7 @@ internal class AnimeRawAdapterTest {
             // given
             val adapter = AnimeRawAdapter().indent("  ")
             val obj = TestAnimeRawObjects.AllPropertiesSet.obj.copy(
-                _relatedAnime = TestAnimeRawObjects.AllPropertiesSet.obj.relatedAnime.union(TestAnimeRawObjects.AllPropertiesSet.obj.sources).toHashSet(),
+                _relatedAnime = TestAnimeRawObjects.AllPropertiesSet.obj.relatedAnime.union(TestAnimeRawObjects.AllPropertiesSet.obj.sources.map { RelatedAnime(it) }).toHashSet(),
                 activateChecks = false,
             )
 
diff --git a/core/src/test/kotlin/io/github/manamiproject/modb/core/json/JsonKtTest.kt b/core/src/test/kotlin/io/github/manamiproject/modb/core/json/JsonKtTest.kt
index 2eaf8a8b..932dec75 100644
--- a/core/src/test/kotlin/io/github/manamiproject/modb/core/json/JsonKtTest.kt
+++ b/core/src/test/kotlin/io/github/manamiproject/modb/core/json/JsonKtTest.kt
@@ -339,7 +339,9 @@ internal class JsonKtTest {
                                 "vap"
                               ],
                               "relatedAnime": [
-                                "https://myanimelist.net/anime/2994"
+                                {
+                                  "uri": "https://myanimelist.net/anime/2994"
+                                }
                               ],
                               "tags": [
                                 "psychological",
@@ -410,7 +412,9 @@ internal class JsonKtTest {
                                 "vap"
                               ],
                               "relatedAnime": [
-                                "https://myanimelist.net/anime/2994"
+                                {
+                                  "uri": "https://myanimelist.net/anime/2994"
+                                }
                               ],
                               "tags": [
                                 "psychological",
diff --git a/core/src/test/kotlin/io/github/manamiproject/modb/core/json/RelatedAnimeAdapterTest.kt b/core/src/test/kotlin/io/github/manamiproject/modb/core/json/RelatedAnimeAdapterTest.kt
new file mode 100644
index 00000000..f90ee762
--- /dev/null
+++ b/core/src/test/kotlin/io/github/manamiproject/modb/core/json/RelatedAnimeAdapterTest.kt
@@ -0,0 +1,155 @@
+package io.github.manamiproject.modb.core.json
+
+import io.github.manamiproject.modb.core.anime.RelatedAnime
+import io.github.manamiproject.modb.test.exceptionExpected
+import org.assertj.core.api.Assertions.assertThat
+import org.junit.jupiter.api.Nested
+import java.net.URI
+import kotlin.test.Test
+
+internal class RelatedAnimeAdapterTest {
+
+    @Nested
+    inner class FromJsonTests {
+
+        @Test
+        fun `correctly deserialize object with uri and relation`() {
+            // given
+            val adapter = RelatedAnimeAdapter()
+
+            // when
+            val result = adapter.fromJson("""{"uri":"https://myanimelist.net/anime/2994","relation":"Summary"}""")
+
+            // then
+            assertThat(result).isEqualTo(RelatedAnime(URI("https://myanimelist.net/anime/2994"), "Summary"))
+        }
+
+        @Test
+        fun `correctly deserialize object without relation`() {
+            // given
+            val adapter = RelatedAnimeAdapter()
+
+            // when
+            val result = adapter.fromJson("""{"uri":"https://livechart.me/anime/3808"}""")
+
+            // then
+            assertThat(result).isEqualTo(RelatedAnime(URI("https://livechart.me/anime/3808")))
+        }
+
+        @Test
+        fun `correctly deserialize object with relation null`() {
+            // given
+            val adapter = RelatedAnimeAdapter()
+
+            // when
+            val result = adapter.fromJson("""{"uri":"https://livechart.me/anime/3808","relation":null}""")
+
+            // then
+            assertThat(result).isEqualTo(RelatedAnime(URI("https://livechart.me/anime/3808")))
+        }
+
+        @Test
+        fun `blank relation results in null`() {
+            // given
+            val adapter = RelatedAnimeAdapter()
+
+            // when
+            val result = adapter.fromJson("""{"uri":"https://livechart.me/anime/3808","relation":"  "}""")
+
+            // then
+            assertThat(result).isEqualTo(RelatedAnime(URI("https://livechart.me/anime/3808")))
+        }
+
+        @Test
+        fun `reads the previous format which only contains the link`() {
+            // given
+            val adapter = RelatedAnimeAdapter()
+
+            // when
+            val result = adapter.fromJson("\"https://myanimelist.net/anime/2994\"")
+
+            // then
+            assertThat(result).isEqualTo(RelatedAnime(URI("https://myanimelist.net/anime/2994")))
+        }
+
+        @Test
+        fun `ignores unknown properties`() {
+            // given
+            val adapter = RelatedAnimeAdapter()
+
+            // when
+            val result = adapter.fromJson("""{"uri":"https://myanimelist.net/anime/2994","other":1,"relation":"Summary"}""")
+
+            // then
+            assertThat(result).isEqualTo(RelatedAnime(URI("https://myanimelist.net/anime/2994"), "Summary"))
+        }
+
+        @Test
+        fun `throws exception if uri is missing`() {
+            // given
+            val adapter = RelatedAnimeAdapter()
+
+            // when
+            val result = exceptionExpected<IllegalStateException> {
+                adapter.fromJson("""{"relation":"Summary"}""")
+            }
+
+            // then
+            assertThat(result).hasMessage("Property 'uri' is either missing or null.")
+        }
+    }
+
+    @Nested
+    inner class ToJsonTests {
+
+        @Test
+        fun `correctly serialize uri and relation`() {
+            // given
+            val adapter = RelatedAnimeAdapter()
+
+            // when
+            val result = adapter.toJson(RelatedAnime(URI("https://myanimelist.net/anime/2994"), "Summary"))
+
+            // then
+            assertThat(result).isEqualTo("""{"uri":"https://myanimelist.net/anime/2994","relation":"Summary"}""")
+        }
+
+        @Test
+        fun `omits relation if it is unknown`() {
+            // given
+            val adapter = RelatedAnimeAdapter()
+
+            // when
+            val result = adapter.toJson(RelatedAnime(URI("https://livechart.me/anime/3808")))
+
+            // then
+            assertThat(result).isEqualTo("""{"uri":"https://livechart.me/anime/3808"}""")
+        }
+
+        @Test
+        fun `omits relation if it is unknown even if serializeNull is set`() {
+            // given
+            val adapter = RelatedAnimeAdapter().serializeNulls()
+
+            // when
+            val result = adapter.toJson(RelatedAnime(URI("https://livechart.me/anime/3808")))
+
+            // then
+            assertThat(result).isEqualTo("""{"uri":"https://livechart.me/anime/3808"}""")
+        }
+
+        @Test
+        fun `throws exception if value is null`() {
+            // given
+            val adapter = RelatedAnimeAdapter()
+
+            // when
+            val result = exceptionExpected<IllegalArgumentException> {
+                adapter.toJson(null)
+            }
+
+            // then
+            assertThat(result).hasMessage("RelatedAnimeAdapter expects non-nullable value, but received null.")
+        }
+    }
+}
diff --git a/kitsu/src/main/kotlin/io/github/manamiproject/modb/kitsu/KitsuAnimeConverter.kt b/kitsu/src/main/kotlin/io/github/manamiproject/modb/kitsu/KitsuAnimeConverter.kt
index 897770aa..acba130f 100644
--- a/kitsu/src/main/kotlin/io/github/manamiproject/modb/kitsu/KitsuAnimeConverter.kt
+++ b/kitsu/src/main/kotlin/io/github/manamiproject/modb/kitsu/KitsuAnimeConverter.kt
@@ -104,7 +104,7 @@ public class KitsuAnimeConverter(
                data.listNotNull<LinkedHashMap<String, Title>>("titles").first().values.filterNotNull()).toHashSet()
     }
 
-    private fun extractRelatedAnime(data: ExtractionResult): HashSet<URI> {
+    private fun extractRelatedAnime(data: ExtractionResult): HashSet<RelatedAnime> {
         if (data.notFound("included")) {
             return hashSetOf()
         }
@@ -113,12 +113,12 @@ public class KitsuAnimeConverter(
 
         return included.filter { it["type"] == "mediaRelationships" }
             .map { it as Map<*,*> }
-            .map { it["relationships"] as Map<*,*> }
-            .map { it["destination"] as Map<*,*> }
-            .map { it["data"] as Map<*,*> }
-            .filter { it["type"] as String == "anime" }
-            .map { it["id"] as AnimeId }
-            .map { metaDataProviderConfig.buildAnimeLink(it) }
+            .mapNotNull { relationship ->
+                val destination = ((relationship["relationships"] as Map<*,*>)["destination"] as Map<*,*>)["data"] as Map<*,*>
+                if (destination["type"] as String != "anime") return@mapNotNull null
+                val role = (relationship["attributes"] as? Map<*,*>)?.get("role")?.toString()
+                RelatedAnime.of(metaDataProviderConfig.buildAnimeLink(destination["id"] as AnimeId), role)
+            }
             .toHashSet()
     }
 
diff --git a/kitsu/src/test/kotlin/io/github/manamiproject/modb/kitsu/KitsuAnimeConverterTest.kt b/kitsu/src/test/kotlin/io/github/manamiproject/modb/kitsu/KitsuAnimeConverterTest.kt
index 9c9aa202..8b235708 100644
--- a/kitsu/src/test/kotlin/io/github/manamiproject/modb/kitsu/KitsuAnimeConverterTest.kt
+++ b/kitsu/src/test/kotlin/io/github/manamiproject/modb/kitsu/KitsuAnimeConverterTest.kt
@@ -1,5 +1,6 @@
 package io.github.manamiproject.modb.kitsu
 
+import io.github.manamiproject.modb.core.anime.RelatedAnime
 import io.github.manamiproject.modb.core.anime.AnimeSeason.Season.*
 import io.github.manamiproject.modb.core.anime.AnimeStatus.*
 import io.github.manamiproject.modb.core.anime.AnimeType.*
@@ -441,12 +442,12 @@ internal class KitsuAnimeConverterTest {
 
                 // then
                 assertThat(result.relatedAnime).containsExactlyInAnyOrder(
-                    URI("https://kitsu.app/anime/10761"),
-                    URI("https://kitsu.app/anime/12549"),
-                    URI("https://kitsu.app/anime/13562"),
-                    URI("https://kitsu.app/anime/7742"),
-                    URI("https://kitsu.app/anime/7913"),
-                    URI("https://kitsu.app/anime/8273"),
+                    RelatedAnime(URI("https://kitsu.app/anime/10761"), "prequel"),
+                    RelatedAnime(URI("https://kitsu.app/anime/12549"), "other"),
+                    RelatedAnime(URI("https://kitsu.app/anime/13562"), "other"),
+                    RelatedAnime(URI("https://kitsu.app/anime/7742"), "other"),
+                    RelatedAnime(URI("https://kitsu.app/anime/7913"), "side_story"),
+                    RelatedAnime(URI("https://kitsu.app/anime/8273"), "sequel"),
                 )
             }
         }
@@ -471,7 +472,7 @@ internal class KitsuAnimeConverterTest {
                 val result = converter.convert(testFileContent)
 
                 // then
-                assertThat(result.relatedAnime).containsExactly(URI("https://kitsu.app/anime/47280"))
+                assertThat(result.relatedAnime).containsExactly(RelatedAnime(URI("https://kitsu.app/anime/47280"), "other"))
             }
         }
 
@@ -496,15 +497,15 @@ internal class KitsuAnimeConverterTest {
 
                 // then
                 assertThat(result.relatedAnime).containsExactlyInAnyOrder(
-                    URI("https://kitsu.app/anime/13850"),
-                    URI("https://kitsu.app/anime/1759"),
-                    URI("https://kitsu.app/anime/1921"),
-                    URI("https://kitsu.app/anime/2634"),
-                    URI("https://kitsu.app/anime/3700"),
-                    URI("https://kitsu.app/anime/42535"),
-                    URI("https://kitsu.app/anime/5518"),
-                    URI("https://kitsu.app/anime/6791"),
-                    URI("https://kitsu.app/anime/7627"),
+                    RelatedAnime(URI("https://kitsu.app/anime/13850"), "alternative_version"),
+                    RelatedAnime(URI("https://kitsu.app/anime/1759"), "side_story"),
+                    RelatedAnime(URI("https://kitsu.app/anime/1921"), "summary"),
+                    RelatedAnime(URI("https://kitsu.app/anime/2634"), "sequel"),
+                    RelatedAnime(URI("https://kitsu.app/anime/3700"), "summary"),
+                    RelatedAnime(URI("https://kitsu.app/anime/42535"), "side_story"),
+                    RelatedAnime(URI("https://kitsu.app/anime/5518"), "other"),
+                    RelatedAnime(URI("https://kitsu.app/anime/6791"), "spinoff"),
+                    RelatedAnime(URI("https://kitsu.app/anime/7627"), "spinoff"),
                 )
             }
         }
diff --git a/lib/src/main/kotlin/io/github/manamiproject/modb/app/dataset/AnimeCountdownUrlAdder.kt b/lib/src/main/kotlin/io/github/manamiproject/modb/app/dataset/AnimeCountdownUrlAdder.kt
index 975b8b5b..43c7f3cd 100644
--- a/lib/src/main/kotlin/io/github/manamiproject/modb/app/dataset/AnimeCountdownUrlAdder.kt
+++ b/lib/src/main/kotlin/io/github/manamiproject/modb/app/dataset/AnimeCountdownUrlAdder.kt
@@ -2,6 +2,7 @@ package io.github.manamiproject.modb.app.dataset
 
 import io.github.manamiproject.modb.animecountdown.AnimeCountdownConfig
 import io.github.manamiproject.modb.core.anime.AnimeRaw
+import io.github.manamiproject.modb.core.anime.RelatedAnime
 import io.github.manamiproject.modb.simkl.SimklConfig
 
 object AnimeCountdownUrlAdder {
@@ -11,9 +12,8 @@ object AnimeCountdownUrlAdder {
             val sources = anime.sources.filter { source -> source.host == SimklConfig.hostname() }
                 .map { SimklConfig.extractAnimeId(it) }
                 .map { AnimeCountdownConfig.buildAnimeLink(it) }
-            val relatedAnime = anime.relatedAnime.filter { source -> source.host == SimklConfig.hostname() }
-                .map { SimklConfig.extractAnimeId(it) }
-                .map { AnimeCountdownConfig.buildAnimeLink(it) }
+            val relatedAnime = anime.relatedAnime.filter { related -> related.uri.host == SimklConfig.hostname() }
+                .map { related -> RelatedAnime(AnimeCountdownConfig.buildAnimeLink(SimklConfig.extractAnimeId(related.uri)), related.relation) }
 
             anime.addSources(sources)
             anime.addRelatedAnime(relatedAnime)
diff --git a/lib/src/main/kotlin/io/github/manamiproject/modb/app/readme/DefaultReadmeCreator.kt b/lib/src/main/kotlin/io/github/manamiproject/modb/app/readme/DefaultReadmeCreator.kt
index f36eaef6..57d8cc0d 100644
--- a/lib/src/main/kotlin/io/github/manamiproject/modb/app/readme/DefaultReadmeCreator.kt
+++ b/lib/src/main/kotlin/io/github/manamiproject/modb/app/readme/DefaultReadmeCreator.kt
@@ -175,9 +175,16 @@ class DefaultReadmeCreator(
             | `synonyms`     | `String[]`                                        | no       | Alternative titles and spellings under which the anime is also known. Duplicate free (case-sensitive). Doesn't contain the `title` |
             | `studios`      | `String[]`                                        | no       | Lower case studio names. In general a duplicate free list, but might contain duplicates for different writings.                    |
             | `producers`    | `String[]`                                        | no       | Lower case producers names. Companies only. In general a duplicate free list, but might contain duplicates for different writings. |
-            | `relatedAnime` | `URL[]`                                           | no       | URLs to the metadata providers for anime that are somehow related to this anime.                                                   |
+            | `relatedAnime` | [RelatedAnime[]](#relatedanime)                   | no       | Anime on the metadata providers which are related to this anime, including the kind of relation if the provider names it.         |
             | `tags`         | `String[]`                                        | no       | A non-curated list of tags and genres which describe the anime. All entries are lower case.                                        |
             
+            ### RelatedAnime
+            
+            | Field      | Type     | Nullable | Description                                                                                                                                       |
+            |------------|----------|----------|---------------------------------------------------------------------------------------------------------------------------------------------------|
+            | `uri`      | `URL`    | no       | URL to the related anime on the metadata provider.                                                                                                |
+            | `relation` | `String` | yes      | Kind of relation exactly as the metadata provider labels it, e.g. `Sequel` (myanimelist), `SEQUEL` (anilist), `sequel` (kitsu). Not unified. Missing if the provider doesn't name it. |
+            
             ### AnimeSeason
             
             | Field    | Type                                                | Nullable | Description                                 |
@@ -307,21 +314,56 @@ class DefaultReadmeCreator(
                     "vap"
                   ],
                   "relatedAnime": [
-                    "https://anidb.net/anime/8146",
-                    "https://anidb.net/anime/8147",
-                    "https://anilist.co/anime/20931",
-                    "https://anilist.co/anime/2994",
-                    "https://anime-planet.com/anime/death-note-rewrite-1-visions-of-a-god",
-                    "https://anime-planet.com/anime/death-note-rewrite-2-ls-successors",
-                    "https://animecountdown.com/36687",
-                    "https://animecountdown.com/40690",
-                    "https://anisearch.com/anime/4441",
-                    "https://anisearch.com/anime/5194",
-                    "https://kitsu.app/anime/2707",
-                    "https://livechart.me/anime/3808",
-                    "https://myanimelist.net/anime/2994",
-                    "https://simkl.com/anime/36687",
-                    "https://simkl.com/anime/40690"
+                    {
+                      "uri": "https://anidb.net/anime/8146",
+                      "relation": "Summary"
+                    },
+                    {
+                      "uri": "https://anidb.net/anime/8147",
+                      "relation": "Summary"
+                    },
+                    {
+                      "uri": "https://anilist.co/anime/20931"
+                    },
+                    {
+                      "uri": "https://anilist.co/anime/2994",
+                      "relation": "SUMMARY"
+                    },
+                    {
+                      "uri": "https://anime-planet.com/anime/death-note-rewrite-1-visions-of-a-god"
+                    },
+                    {
+                      "uri": "https://anime-planet.com/anime/death-note-rewrite-2-ls-successors"
+                    },
+                    {
+                      "uri": "https://animecountdown.com/36687"
+                    },
+                    {
+                      "uri": "https://animecountdown.com/40690"
+                    },
+                    {
+                      "uri": "https://anisearch.com/anime/4441"
+                    },
+                    {
+                      "uri": "https://anisearch.com/anime/5194"
+                    },
+                    {
+                      "uri": "https://kitsu.app/anime/2707",
+                      "relation": "summary"
+                    },
+                    {
+                      "uri": "https://livechart.me/anime/3808"
+                    },
+                    {
+                      "uri": "https://myanimelist.net/anime/2994",
+                      "relation": "Summary"
+                    },
+                    {
+                      "uri": "https://simkl.com/anime/36687"
+                    },
+                    {
+                      "uri": "https://simkl.com/anime/40690"
+                    }
                   ],
                   "tags": [
                     "achronological order",
diff --git a/lib/src/main/kotlin/io/github/manamiproject/modb/app/synonyms/DefaultAmbiguousSynonymRemover.kt b/lib/src/main/kotlin/io/github/manamiproject/modb/app/synonyms/DefaultAmbiguousSynonymRemover.kt
index 91622e47..d53917ef 100644
--- a/lib/src/main/kotlin/io/github/manamiproject/modb/app/synonyms/DefaultAmbiguousSynonymRemover.kt
+++ b/lib/src/main/kotlin/io/github/manamiproject/modb/app/synonyms/DefaultAmbiguousSynonymRemover.kt
@@ -33,7 +33,7 @@ class DefaultAmbiguousSynonymRemover: AmbiguousSynonymRemover {
         var removed = 0
 
         allEntries.forEachIndexed { index, anime ->
-            val relatedEntries = anime.relatedAnime.mapNotNull { indexBySource[it] }
+            val relatedEntries = anime.relatedAnime.mapNotNull { indexBySource[it.uri] }
                 .filterNot { it == index }
                 .distinct()
 
diff --git a/lib/src/test/kotlin/io/github/manamiproject/modb/app/TestingAssets.kt b/lib/src/test/kotlin/io/github/manamiproject/modb/app/TestingAssets.kt
index 312573ff..c06e768a 100644
--- a/lib/src/test/kotlin/io/github/manamiproject/modb/app/TestingAssets.kt
+++ b/lib/src/test/kotlin/io/github/manamiproject/modb/app/TestingAssets.kt
@@ -1,5 +1,6 @@
 package io.github.manamiproject.modb.app
 
+import io.github.manamiproject.modb.core.anime.RelatedAnime
 import io.github.manamiproject.kommand.CommandExecutor
 import io.github.manamiproject.kommand.CommandLineConfig
 import io.github.manamiproject.modb.app.config.Config
@@ -303,7 +304,7 @@ internal object TestAnimeRawObjects {
                     "vap",
                 ),
                 _relatedAnime = hashSetOf(
-                    URI("https://myanimelist.net/anime/2994"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/2994")),
                 ),
                 _tags = hashSetOf(
                     "psychological",
@@ -361,7 +362,9 @@ internal object TestAnimeRawObjects {
                 "vap"
               ],
               "relatedAnime": [
-                "https://myanimelist.net/anime/2994"
+                {
+                  "uri": "https://myanimelist.net/anime/2994"
+                }
               ],
               "tags": [
                 "psychological",
@@ -373,7 +376,7 @@ internal object TestAnimeRawObjects {
         """.trimIndent()
 
         val serializedMinified = """
-            {"sources":["https://myanimelist.net/anime/1535"],"title":"Death Note","type":"TV","episodes":37,"status":"FINISHED","animeSeason":{"season":"FALL"},"picture":"https://cdn.myanimelist.net/images/anime/1079/138100.jpg","thumbnail":"https://cdn.myanimelist.net/images/anime/1079/138100t.jpg","scores":[{"hostname":"myanimelist.net","value":8.62,"range":{"minInclusive":1.0,"maxInclusive":10.0}}],"synonyms":["DN","デスノート"],"studios":["madhouse"],"producers":["d.n. dream partners","nippon television network","shueisha","vap"],"relatedAnime":["https://myanimelist.net/anime/2994"],"tags":["psychological","shounen","supernatural","suspense"]}
+            {"sources":["https://myanimelist.net/anime/1535"],"title":"Death Note","type":"TV","episodes":37,"status":"FINISHED","animeSeason":{"season":"FALL"},"picture":"https://cdn.myanimelist.net/images/anime/1079/138100.jpg","thumbnail":"https://cdn.myanimelist.net/images/anime/1079/138100t.jpg","scores":[{"hostname":"myanimelist.net","value":8.62,"range":{"minInclusive":1.0,"maxInclusive":10.0}}],"synonyms":["DN","デスノート"],"studios":["madhouse"],"producers":["d.n. dream partners","nippon television network","shueisha","vap"],"relatedAnime":[{"uri":"https://myanimelist.net/anime/2994"}],"tags":["psychological","shounen","supernatural","suspense"]}
         """.trimIndent()
     }
 
@@ -414,7 +417,7 @@ internal object TestAnimeRawObjects {
                     "pony canyon",
                 ),
                 _relatedAnime = hashSetOf(
-                    URI("https://anilist.co/anime/131520"),
+                    RelatedAnime(URI("https://anilist.co/anime/131520")),
                 ),
                 _tags = hashSetOf(
                     "comedy",
@@ -483,7 +486,9 @@ internal object TestAnimeRawObjects {
                 "pony canyon"
               ],
               "relatedAnime": [
-                "https://anilist.co/anime/131520"
+                {
+                  "uri": "https://anilist.co/anime/131520"
+                }
               ],
               "tags": [
                 "comedy",
@@ -504,7 +509,7 @@ internal object TestAnimeRawObjects {
         """.trimIndent()
 
         val serializedMinified = """
-            {"sources":["https://anilist.co/anime/177191"],"title":"Go-toubun no Hanayome *","type":"SPECIAL","episodes":2,"status":"FINISHED","animeSeason":{"season":"FALL","year":2024},"picture":"https://s4.anilist.co/file/anilistcdn/media/anime/cover/medium/bx177191-ovNZsq8EbIPY.jpg","thumbnail":"https://s4.anilist.co/file/anilistcdn/media/anime/cover/medium/bx177191-ovNZsq8EbIPY.jpg","duration":{"value":1440,"unit":"SECONDS"},"scores":[{"hostname":"anilist.co","value":75.0,"range":{"minInclusive":1.0,"maxInclusive":100.0}}],"synonyms":["The Quintessential Quintuplets*","五等分の花嫁*"],"studios":["bibury animation studios"],"producers":["dax production","nichion","pony canyon"],"relatedAnime":["https://anilist.co/anime/131520"],"tags":["comedy","drama","ensemble cast","female harem","heterosexual","language barrier","male protagonist","marriage","primarily female cast","romance","school","shounen","twins"]}
+            {"sources":["https://anilist.co/anime/177191"],"title":"Go-toubun no Hanayome *","type":"SPECIAL","episodes":2,"status":"FINISHED","animeSeason":{"season":"FALL","year":2024},"picture":"https://s4.anilist.co/file/anilistcdn/media/anime/cover/medium/bx177191-ovNZsq8EbIPY.jpg","thumbnail":"https://s4.anilist.co/file/anilistcdn/media/anime/cover/medium/bx177191-ovNZsq8EbIPY.jpg","duration":{"value":1440,"unit":"SECONDS"},"scores":[{"hostname":"anilist.co","value":75.0,"range":{"minInclusive":1.0,"maxInclusive":100.0}}],"synonyms":["The Quintessential Quintuplets*","五等分の花嫁*"],"studios":["bibury animation studios"],"producers":["dax production","nichion","pony canyon"],"relatedAnime":[{"uri":"https://anilist.co/anime/131520"}],"tags":["comedy","drama","ensemble cast","female harem","heterosexual","language barrier","male protagonist","marriage","primarily female cast","romance","school","shounen","twins"]}
         """.trimIndent()
     }
 
@@ -563,18 +568,18 @@ internal object TestAnimeRawObjects {
                     "pony canyon",
                 ),
                 _relatedAnime = hashSetOf(
-                    URI("https://anidb.net/anime/16165"),
-                    URI("https://anilist.co/anime/131520"),
-                    URI("https://anime-planet.com/anime/the-quintessential-quintuplets-movie"),
-                    URI("https://animecountdown.com/1577789"),
-                    URI("https://anisearch.com/anime/16091"),
-                    URI("https://kitsu.app/anime/44229"),
-                    URI("https://livechart.me/anime/10488"),
-                    URI("https://livechart.me/anime/11921"),
-                    URI("https://livechart.me/anime/3448"),
-                    URI("https://livechart.me/anime/9428"),
-                    URI("https://myanimelist.net/anime/48548"),
-                    URI("https://simkl.com/anime/1577789"),
+                    RelatedAnime(URI("https://anidb.net/anime/16165")),
+                    RelatedAnime(URI("https://anilist.co/anime/131520")),
+                    RelatedAnime(URI("https://anime-planet.com/anime/the-quintessential-quintuplets-movie")),
+                    RelatedAnime(URI("https://animecountdown.com/1577789")),
+                    RelatedAnime(URI("https://anisearch.com/anime/16091")),
+                    RelatedAnime(URI("https://kitsu.app/anime/44229")),
+                    RelatedAnime(URI("https://livechart.me/anime/10488")),
+                    RelatedAnime(URI("https://livechart.me/anime/11921")),
+                    RelatedAnime(URI("https://livechart.me/anime/3448")),
+                    RelatedAnime(URI("https://livechart.me/anime/9428")),
+                    RelatedAnime(URI("https://myanimelist.net/anime/48548")),
+                    RelatedAnime(URI("https://simkl.com/anime/1577789")),
                 ),
                 _tags = hashSetOf(
                     "america",
@@ -762,18 +767,42 @@ internal object TestAnimeRawObjects {
                 "pony canyon"
               ],
               "relatedAnime": [
-                "https://anidb.net/anime/16165",
-                "https://anilist.co/anime/131520",
-                "https://anime-planet.com/anime/the-quintessential-quintuplets-movie",
-                "https://animecountdown.com/1577789",
-                "https://anisearch.com/anime/16091",
-                "https://kitsu.app/anime/44229",
-                "https://livechart.me/anime/10488",
-                "https://livechart.me/anime/11921",
-                "https://livechart.me/anime/3448",
-                "https://livechart.me/anime/9428",
-                "https://myanimelist.net/anime/48548",
-                "https://simkl.com/anime/1577789"
+                {
+                  "uri": "https://anidb.net/anime/16165"
+                },
+                {
+                  "uri": "https://anilist.co/anime/131520"
+                },
+                {
+                  "uri": "https://anime-planet.com/anime/the-quintessential-quintuplets-movie"
+                },
+                {
+                  "uri": "https://animecountdown.com/1577789"
+                },
+                {
+                  "uri": "https://anisearch.com/anime/16091"
+                },
+                {
+                  "uri": "https://kitsu.app/anime/44229"
+                },
+                {
+                  "uri": "https://livechart.me/anime/10488"
+                },
+                {
+                  "uri": "https://livechart.me/anime/11921"
+                },
+                {
+                  "uri": "https://livechart.me/anime/3448"
+                },
+                {
+                  "uri": "https://livechart.me/anime/9428"
+                },
+                {
+                  "uri": "https://myanimelist.net/anime/48548"
+                },
+                {
+                  "uri": "https://simkl.com/anime/1577789"
+                }
               ],
               "tags": [
                 "america",
@@ -804,7 +833,7 @@ internal object TestAnimeRawObjects {
         """.trimIndent()
 
         val serializedMinified = """
-            {"sources":["https://anidb.net/anime/18603","https://anilist.co/anime/177191","https://anime-planet.com/anime/the-quintessential-quintuplets-specials-2","https://anisearch.com/anime/19242","https://kitsu.app/anime/48807","https://livechart.me/anime/12646","https://myanimelist.net/anime/58755","https://simkl.com/anime/2448488"],"title":"5-toubun no Hanayome*","type":"SPECIAL","episodes":2,"status":"FINISHED","animeSeason":{"season":"FALL","year":2024},"picture":"https://cdn.myanimelist.net/images/anime/1915/145336.jpg","thumbnail":"https://cdn.myanimelist.net/images/anime/1915/145336t.jpg","duration":{"value":1440,"unit":"SECONDS"},"scores":[{"hostname":"anidb.net","value":6.63,"range":{"minInclusive":1,"maxInclusive":10}},{"hostname":"anilist.co","value":75,"range":{"minInclusive":1,"maxInclusive":100}},{"hostname":"anime-planet.com","value":3.845,"range":{"minInclusive":0.5,"maxInclusive":5.0}},{"hostname":"anisearch.com","value":3.9,"range":{"minInclusive":0.1,"maxInclusive":5}},{"hostname":"kitsu.app","value":76.95,"range":{"minInclusive":1,"maxInclusive":100}},{"hostname":"livechart.me","value":8.35,"range":{"minInclusive":1,"maxInclusive":10}},{"hostname":"myanimelist.net","value":8.62,"range":{"minInclusive":1,"maxInclusive":10}},{"hostname":"simkl.com","value":7.9,"range":{"minInclusive":1,"maxInclusive":10}}],"synonyms":["5-toubun no Hanayome *","Go-Toubun no Hanayome *","Go-Tōbun no Hanayome *","Go-toubun no Hanayome *","The Quintessential Quintuplets *","The Quintessential Quintuplets Movie*","The Quintessential Quintuplets Special 2","The Quintessential Quintuplets Specials 2","The Quintessential Quintuplets*","The Quintessential Quintuplets: Honeymoon Arc","五等分の花嫁*","五等分の花嫁＊","五等分的新娘＊"],"studios":["bibury animation studios"],"producers":["dax production","nichion","pony canyon"],"relatedAnime":["https://anidb.net/anime/16165","https://anilist.co/anime/131520","https://anime-planet.com/anime/the-quintessential-quintuplets-movie","https://animecountdown.com/1577789","https://anisearch.com/anime/16091","https://kitsu.app/anime/44229","https://livechart.me/anime/10488","https://livechart.me/anime/11921","https://livechart.me/anime/3448","https://livechart.me/anime/9428","https://myanimelist.net/anime/48548","https://simkl.com/anime/1577789"],"tags":["america","based on a manga","comedy","drama","ensemble cast","female harem","harem","heterosexual","japanese production","language barrier","male protagonist","marriage","new","predominantly female cast","present","primarily female cast","romance","school","sequel","shounen","siblings","time","twins"]}
+            {"sources":["https://anidb.net/anime/18603","https://anilist.co/anime/177191","https://anime-planet.com/anime/the-quintessential-quintuplets-specials-2","https://anisearch.com/anime/19242","https://kitsu.app/anime/48807","https://livechart.me/anime/12646","https://myanimelist.net/anime/58755","https://simkl.com/anime/2448488"],"title":"5-toubun no Hanayome*","type":"SPECIAL","episodes":2,"status":"FINISHED","animeSeason":{"season":"FALL","year":2024},"picture":"https://cdn.myanimelist.net/images/anime/1915/145336.jpg","thumbnail":"https://cdn.myanimelist.net/images/anime/1915/145336t.jpg","duration":{"value":1440,"unit":"SECONDS"},"scores":[{"hostname":"anidb.net","value":6.63,"range":{"minInclusive":1,"maxInclusive":10}},{"hostname":"anilist.co","value":75,"range":{"minInclusive":1,"maxInclusive":100}},{"hostname":"anime-planet.com","value":3.845,"range":{"minInclusive":0.5,"maxInclusive":5.0}},{"hostname":"anisearch.com","value":3.9,"range":{"minInclusive":0.1,"maxInclusive":5}},{"hostname":"kitsu.app","value":76.95,"range":{"minInclusive":1,"maxInclusive":100}},{"hostname":"livechart.me","value":8.35,"range":{"minInclusive":1,"maxInclusive":10}},{"hostname":"myanimelist.net","value":8.62,"range":{"minInclusive":1,"maxInclusive":10}},{"hostname":"simkl.com","value":7.9,"range":{"minInclusive":1,"maxInclusive":10}}],"synonyms":["5-toubun no Hanayome *","Go-Toubun no Hanayome *","Go-Tōbun no Hanayome *","Go-toubun no Hanayome *","The Quintessential Quintuplets *","The Quintessential Quintuplets Movie*","The Quintessential Quintuplets Special 2","The Quintessential Quintuplets Specials 2","The Quintessential Quintuplets*","The Quintessential Quintuplets: Honeymoon Arc","五等分の花嫁*","五等分の花嫁＊","五等分的新娘＊"],"studios":["bibury animation studios"],"producers":["dax production","nichion","pony canyon"],"relatedAnime":[{"uri":"https://anidb.net/anime/16165"},{"uri":"https://anilist.co/anime/131520"},{"uri":"https://anime-planet.com/anime/the-quintessential-quintuplets-movie"},{"uri":"https://animecountdown.com/1577789"},{"uri":"https://anisearch.com/anime/16091"},{"uri":"https://kitsu.app/anime/44229"},{"uri":"https://livechart.me/anime/10488"},{"uri":"https://livechart.me/anime/11921"},{"uri":"https://livechart.me/anime/3448"},{"uri":"https://livechart.me/anime/9428"},{"uri":"https://myanimelist.net/anime/48548"},{"uri":"https://simkl.com/anime/1577789"}],"tags":["america","based on a manga","comedy","drama","ensemble cast","female harem","harem","heterosexual","japanese production","language barrier","male protagonist","marriage","new","predominantly female cast","present","primarily female cast","romance","school","sequel","shounen","siblings","time","twins"]}
         """.trimIndent()
     }
 }
@@ -884,7 +913,7 @@ internal object TestAnimeObjects {
                     "vap",
                 ),
                 relatedAnime = hashSetOf(
-                    URI("https://myanimelist.net/anime/2994"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/2994")),
                 ),
                 tags = hashSetOf(
                     "psychological",
@@ -925,7 +954,9 @@ internal object TestAnimeObjects {
                 "vap"
               ],
               "relatedAnime": [
-                "https://myanimelist.net/anime/2994"
+                {
+                  "uri": "https://myanimelist.net/anime/2994"
+                }
               ],
               "tags": [
                 "psychological",
@@ -937,7 +968,7 @@ internal object TestAnimeObjects {
         """.trimIndent()
 
         val serializedMinified = """
-            {"sources":["https://myanimelist.net/anime/1535"],"title":"Death Note","type":"TV","episodes":37,"status":"FINISHED","animeSeason":{"season":"FALL"},"picture":"https://cdn.myanimelist.net/images/anime/1079/138100.jpg","thumbnail":"https://cdn.myanimelist.net/images/anime/1079/138100t.jpg","synonyms":["DN","デスノート"],"studios":["madhouse"],"producers":["D.N. Dream Partners","nippon television network","shueisha","vap"],"relatedAnime":["https://myanimelist.net/anime/2994"],"tags":["psychological","shounen","supernatural","suspense"]}
+            {"sources":["https://myanimelist.net/anime/1535"],"title":"Death Note","type":"TV","episodes":37,"status":"FINISHED","animeSeason":{"season":"FALL"},"picture":"https://cdn.myanimelist.net/images/anime/1079/138100.jpg","thumbnail":"https://cdn.myanimelist.net/images/anime/1079/138100t.jpg","synonyms":["DN","デスノート"],"studios":["madhouse"],"producers":["D.N. Dream Partners","nippon television network","shueisha","vap"],"relatedAnime":[{"uri":"https://myanimelist.net/anime/2994"}],"tags":["psychological","shounen","supernatural","suspense"]}
         """.trimIndent()
     }
 
@@ -983,7 +1014,7 @@ internal object TestAnimeObjects {
                     "pony canyon",
                 ),
                 relatedAnime = hashSetOf(
-                    URI("https://myanimelist.net/anime/48548"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/48548")),
                 ),
                 tags = hashSetOf(
                     "comedy",
@@ -1031,7 +1062,9 @@ internal object TestAnimeObjects {
                 "pony canyon"
               ],
               "relatedAnime": [
-                "https://myanimelist.net/anime/48548"
+                {
+                  "uri": "https://myanimelist.net/anime/48548"
+                }
               ],
               "tags": [
                 "comedy",
@@ -1044,7 +1077,7 @@ internal object TestAnimeObjects {
         """.trimIndent()
 
         val serializedMinified = """
-            {"sources":["https://myanimelist.net/anime/58755"],"title":"5-toubun no Hanayome*","type":"SPECIAL","episodes":2,"status":"FINISHED","animeSeason":{"season":"FALL","year":2024},"picture":"https://cdn.myanimelist.net/images/anime/1915/145336.jpg","thumbnail":"https://cdn.myanimelist.net/images/anime/1915/145336t.jpg","duration":{"value":1440,"unit":"SECONDS"},"score":{"arithmeticGeometricMean":7.44,"arithmeticMean":7.44,"median":7.44},"synonyms":["The Quintessential Quintuplets*","五等分の花嫁*"],"studios":["bibury animation studios"],"producers":["dax production","nichion","pony canyon"],"relatedAnime":["https://myanimelist.net/anime/48548"],"tags":["comedy","harem","romance","school","shounen"]}
+            {"sources":["https://myanimelist.net/anime/58755"],"title":"5-toubun no Hanayome*","type":"SPECIAL","episodes":2,"status":"FINISHED","animeSeason":{"season":"FALL","year":2024},"picture":"https://cdn.myanimelist.net/images/anime/1915/145336.jpg","thumbnail":"https://cdn.myanimelist.net/images/anime/1915/145336t.jpg","duration":{"value":1440,"unit":"SECONDS"},"score":{"arithmeticGeometricMean":7.44,"arithmeticMean":7.44,"median":7.44},"synonyms":["The Quintessential Quintuplets*","五等分の花嫁*"],"studios":["bibury animation studios"],"producers":["dax production","nichion","pony canyon"],"relatedAnime":[{"uri":"https://myanimelist.net/anime/48548"}],"tags":["comedy","harem","romance","school","shounen"]}
         """.trimIndent()
     }
 
@@ -1109,18 +1142,18 @@ internal object TestAnimeObjects {
                     "tbs",
                 ),
                 relatedAnime = hashSetOf(
-                    URI("https://anidb.net/anime/16165"),
-                    URI("https://anilist.co/anime/131520"),
-                    URI("https://anime-planet.com/anime/the-quintessential-quintuplets-movie"),
-                    URI("https://animecountdown.com/1577789"),
-                    URI("https://anisearch.com/anime/16091"),
-                    URI("https://kitsu.app/anime/44229"),
-                    URI("https://livechart.me/anime/10488"),
-                    URI("https://livechart.me/anime/11921"),
-                    URI("https://livechart.me/anime/3448"),
-                    URI("https://livechart.me/anime/9428"),
-                    URI("https://myanimelist.net/anime/48548"),
-                    URI("https://simkl.com/anime/1577789"),
+                    RelatedAnime(URI("https://anidb.net/anime/16165")),
+                    RelatedAnime(URI("https://anilist.co/anime/131520")),
+                    RelatedAnime(URI("https://anime-planet.com/anime/the-quintessential-quintuplets-movie")),
+                    RelatedAnime(URI("https://animecountdown.com/1577789")),
+                    RelatedAnime(URI("https://anisearch.com/anime/16091")),
+                    RelatedAnime(URI("https://kitsu.app/anime/44229")),
+                    RelatedAnime(URI("https://livechart.me/anime/10488")),
+                    RelatedAnime(URI("https://livechart.me/anime/11921")),
+                    RelatedAnime(URI("https://livechart.me/anime/3448")),
+                    RelatedAnime(URI("https://livechart.me/anime/9428")),
+                    RelatedAnime(URI("https://myanimelist.net/anime/48548")),
+                    RelatedAnime(URI("https://simkl.com/anime/1577789")),
                 ),
                 tags = hashSetOf(
                     "america",
@@ -1206,18 +1239,42 @@ internal object TestAnimeObjects {
                 "tbs"
               ],
               "relatedAnime": [
-                "https://anidb.net/anime/16165",
-                "https://anilist.co/anime/131520",
-                "https://anime-planet.com/anime/the-quintessential-quintuplets-movie",
-                "https://animecountdown.com/1577789",
-                "https://anisearch.com/anime/16091",
-                "https://kitsu.app/anime/44229",
-                "https://livechart.me/anime/10488",
-                "https://livechart.me/anime/11921",
-                "https://livechart.me/anime/3448",
-                "https://livechart.me/anime/9428",
-                "https://myanimelist.net/anime/48548",
-                "https://simkl.com/anime/1577789"
+                {
+                  "uri": "https://anidb.net/anime/16165"
+                },
+                {
+                  "uri": "https://anilist.co/anime/131520"
+                },
+                {
+                  "uri": "https://anime-planet.com/anime/the-quintessential-quintuplets-movie"
+                },
+                {
+                  "uri": "https://animecountdown.com/1577789"
+                },
+                {
+                  "uri": "https://anisearch.com/anime/16091"
+                },
+                {
+                  "uri": "https://kitsu.app/anime/44229"
+                },
+                {
+                  "uri": "https://livechart.me/anime/10488"
+                },
+                {
+                  "uri": "https://livechart.me/anime/11921"
+                },
+                {
+                  "uri": "https://livechart.me/anime/3448"
+                },
+                {
+                  "uri": "https://livechart.me/anime/9428"
+                },
+                {
+                  "uri": "https://myanimelist.net/anime/48548"
+                },
+                {
+                  "uri": "https://simkl.com/anime/1577789"
+                }
               ],
               "tags": [
                 "america",
@@ -1248,7 +1305,7 @@ internal object TestAnimeObjects {
         """.trimIndent()
 
         val serializedMinified = """
-            {"sources":["https://anidb.net/anime/18603","https://anilist.co/anime/177191","https://anime-planet.com/anime/the-quintessential-quintuplets-specials-2","https://anisearch.com/anime/19242","https://kitsu.app/anime/48807","https://livechart.me/anime/12646","https://myanimelist.net/anime/58755","https://simkl.com/anime/2448488"],"title":"5-toubun no Hanayome*","type":"SPECIAL","episodes":2,"status":"FINISHED","animeSeason":{"season":"FALL","year":2024},"picture":"https://cdn.myanimelist.net/images/anime/1915/145336.jpg","thumbnail":"https://cdn.myanimelist.net/images/anime/1915/145336t.jpg","duration":{"value":1440,"unit":"SECONDS"},"score":{"arithmeticGeometricMean":7.616175305477198,"arithmeticMean":7.624601113172541,"median":7.7272727272727275},"synonyms":["5-toubun no Hanayome *","Go-Toubun no Hanayome *","Go-Tōbun no Hanayome *","Go-toubun no Hanayome *","The Quintessential Quintuplets *","The Quintessential Quintuplets Movie*","The Quintessential Quintuplets Special 2","The Quintessential Quintuplets Specials 2","The Quintessential Quintuplets*","The Quintessential Quintuplets: Honeymoon Arc","五等分の花嫁*","五等分の花嫁＊","五等分的新娘＊"],"studios":["bibury animation studios"],"producers":["dax production","nichion","pony canyon","tbs"],"relatedAnime":["https://anidb.net/anime/16165","https://anilist.co/anime/131520","https://anime-planet.com/anime/the-quintessential-quintuplets-movie","https://animecountdown.com/1577789","https://anisearch.com/anime/16091","https://kitsu.app/anime/44229","https://livechart.me/anime/10488","https://livechart.me/anime/11921","https://livechart.me/anime/3448","https://livechart.me/anime/9428","https://myanimelist.net/anime/48548","https://simkl.com/anime/1577789"],"tags":["america","based on a manga","comedy","drama","ensemble cast","female harem","harem","heterosexual","japanese production","language barrier","male protagonist","marriage","new","predominantly female cast","present","primarily female cast","romance","school","sequel","shounen","siblings","time","twins"]}
+            {"sources":["https://anidb.net/anime/18603","https://anilist.co/anime/177191","https://anime-planet.com/anime/the-quintessential-quintuplets-specials-2","https://anisearch.com/anime/19242","https://kitsu.app/anime/48807","https://livechart.me/anime/12646","https://myanimelist.net/anime/58755","https://simkl.com/anime/2448488"],"title":"5-toubun no Hanayome*","type":"SPECIAL","episodes":2,"status":"FINISHED","animeSeason":{"season":"FALL","year":2024},"picture":"https://cdn.myanimelist.net/images/anime/1915/145336.jpg","thumbnail":"https://cdn.myanimelist.net/images/anime/1915/145336t.jpg","duration":{"value":1440,"unit":"SECONDS"},"score":{"arithmeticGeometricMean":7.616175305477198,"arithmeticMean":7.624601113172541,"median":7.7272727272727275},"synonyms":["5-toubun no Hanayome *","Go-Toubun no Hanayome *","Go-Tōbun no Hanayome *","Go-toubun no Hanayome *","The Quintessential Quintuplets *","The Quintessential Quintuplets Movie*","The Quintessential Quintuplets Special 2","The Quintessential Quintuplets Specials 2","The Quintessential Quintuplets*","The Quintessential Quintuplets: Honeymoon Arc","五等分の花嫁*","五等分の花嫁＊","五等分的新娘＊"],"studios":["bibury animation studios"],"producers":["dax production","nichion","pony canyon","tbs"],"relatedAnime":[{"uri":"https://anidb.net/anime/16165"},{"uri":"https://anilist.co/anime/131520"},{"uri":"https://anime-planet.com/anime/the-quintessential-quintuplets-movie"},{"uri":"https://animecountdown.com/1577789"},{"uri":"https://anisearch.com/anime/16091"},{"uri":"https://kitsu.app/anime/44229"},{"uri":"https://livechart.me/anime/10488"},{"uri":"https://livechart.me/anime/11921"},{"uri":"https://livechart.me/anime/3448"},{"uri":"https://livechart.me/anime/9428"},{"uri":"https://myanimelist.net/anime/48548"},{"uri":"https://simkl.com/anime/1577789"}],"tags":["america","based on a manga","comedy","drama","ensemble cast","female harem","harem","heterosexual","japanese production","language barrier","male protagonist","marriage","new","predominantly female cast","present","primarily female cast","romance","school","sequel","shounen","siblings","time","twins"]}
         """.trimIndent()
     }
 }
\ No newline at end of file
diff --git a/lib/src/test/kotlin/io/github/manamiproject/modb/app/dataset/AnimeCountdownUrlAdderTest.kt b/lib/src/test/kotlin/io/github/manamiproject/modb/app/dataset/AnimeCountdownUrlAdderTest.kt
index 84b337c4..78c6db5b 100644
--- a/lib/src/test/kotlin/io/github/manamiproject/modb/app/dataset/AnimeCountdownUrlAdderTest.kt
+++ b/lib/src/test/kotlin/io/github/manamiproject/modb/app/dataset/AnimeCountdownUrlAdderTest.kt
@@ -3,6 +3,7 @@ package io.github.manamiproject.modb.app.dataset
 import io.github.manamiproject.modb.anilist.AnilistConfig
 import io.github.manamiproject.modb.animecountdown.AnimeCountdownConfig
 import io.github.manamiproject.modb.core.anime.AnimeRaw
+import io.github.manamiproject.modb.core.anime.RelatedAnime
 import io.github.manamiproject.modb.myanimelist.MyanimelistConfig
 import io.github.manamiproject.modb.simkl.SimklConfig
 import org.assertj.core.api.Assertions.assertThat
@@ -41,15 +42,40 @@ internal class AnimeCountdownUrlAdderTest {
         val testAnime = AnimeRaw(
             _title = "Test",
             _relatedAnime = hashSetOf(
-                SimklConfig.buildAnimeLink("1535"),
+                RelatedAnime(SimklConfig.buildAnimeLink("1535")),
             ),
         )
 
         val expectedAnime = AnimeRaw(
             _title = "Test",
             _relatedAnime = hashSetOf(
-                AnimeCountdownConfig.buildAnimeLink("1535"),
-                SimklConfig.buildAnimeLink("1535"),
+                RelatedAnime(AnimeCountdownConfig.buildAnimeLink("1535")),
+                RelatedAnime(SimklConfig.buildAnimeLink("1535")),
+            ),
+        )
+
+        // when
+        val result = AnimeCountdownUrlAdder.addAnimeCountdown(listOf(testAnime))
+
+        // then
+        assertThat(result).containsExactly(expectedAnime)
+    }
+
+    @Test
+    fun `keeps the relation when adding URI in relatedAnime`() {
+        // given
+        val testAnime = AnimeRaw(
+            _title = "Test",
+            _relatedAnime = hashSetOf(
+                RelatedAnime(SimklConfig.buildAnimeLink("1535"), "Sequel"),
+            ),
+        )
+
+        val expectedAnime = AnimeRaw(
+            _title = "Test",
+            _relatedAnime = hashSetOf(
+                RelatedAnime(AnimeCountdownConfig.buildAnimeLink("1535"), "Sequel"),
+                RelatedAnime(SimklConfig.buildAnimeLink("1535"), "Sequel"),
             ),
         )
 
@@ -84,8 +110,8 @@ internal class AnimeCountdownUrlAdderTest {
         val testAnime = AnimeRaw(
             _title = "Test",
             _relatedAnime = hashSetOf(
-                MyanimelistConfig.buildAnimeLink("1535"),
-                AnilistConfig.buildAnimeLink("1535"),
+                RelatedAnime(MyanimelistConfig.buildAnimeLink("1535")),
+                RelatedAnime(AnilistConfig.buildAnimeLink("1535")),
             ),
         )
 
diff --git a/lib/src/test/kotlin/io/github/manamiproject/modb/app/downloadcontrolstate/DefaultDownloadControlStateSchedulerTest.kt b/lib/src/test/kotlin/io/github/manamiproject/modb/app/downloadcontrolstate/DefaultDownloadControlStateSchedulerTest.kt
index 6e34d5c0..432817fa 100644
--- a/lib/src/test/kotlin/io/github/manamiproject/modb/app/downloadcontrolstate/DefaultDownloadControlStateSchedulerTest.kt
+++ b/lib/src/test/kotlin/io/github/manamiproject/modb/app/downloadcontrolstate/DefaultDownloadControlStateSchedulerTest.kt
@@ -1,5 +1,6 @@
 package io.github.manamiproject.modb.app.downloadcontrolstate
 
+import io.github.manamiproject.modb.core.anime.RelatedAnime
 import io.github.manamiproject.modb.anilist.AnilistConfig
 import io.github.manamiproject.modb.app.TestAppConfig
 import io.github.manamiproject.modb.app.TestDownloadControlStateAccessor
@@ -57,7 +58,7 @@ internal class DefaultDownloadControlStateSchedulerTest {
                             "フルーツバスケット",
                         ),
                         _relatedAnime = hashSetOf(
-                            URI("https://kitsu.app/anime/41995"),
+                            RelatedAnime(URI("https://kitsu.app/anime/41995")),
                         ),
                     ),
                 )
@@ -120,7 +121,7 @@ internal class DefaultDownloadControlStateSchedulerTest {
                             "フルーツバスケット",
                         ),
                         _relatedAnime = hashSetOf(
-                            URI("https://kitsu.app/anime/41995"),
+                            RelatedAnime(URI("https://kitsu.app/anime/41995")),
                         ),
                     ),
                 )
@@ -187,7 +188,7 @@ internal class DefaultDownloadControlStateSchedulerTest {
                             "新世紀エヴァンゲリオン劇場版 THE END OF EVANGELION",
                         ),
                         _relatedAnime = hashSetOf(
-                            URI("https://anilist.co/anime/30"),
+                            RelatedAnime(URI("https://anilist.co/anime/30")),
                         ),
                         _tags = hashSetOf(
                             "action",
@@ -258,7 +259,7 @@ internal class DefaultDownloadControlStateSchedulerTest {
                             "新世紀エヴァンゲリオン劇場版 THE END OF EVANGELION",
                         ),
                         _relatedAnime = hashSetOf(
-                            URI("https://anilist.co/anime/30"),
+                            RelatedAnime(URI("https://anilist.co/anime/30")),
                         ),
                         _tags = hashSetOf(
                             "action",
diff --git a/lib/src/test/kotlin/io/github/manamiproject/modb/app/downloadcontrolstate/DefaultDownloadControlStateUpdaterTest.kt b/lib/src/test/kotlin/io/github/manamiproject/modb/app/downloadcontrolstate/DefaultDownloadControlStateUpdaterTest.kt
index 51db9fe6..9fd2d00a 100644
--- a/lib/src/test/kotlin/io/github/manamiproject/modb/app/downloadcontrolstate/DefaultDownloadControlStateUpdaterTest.kt
+++ b/lib/src/test/kotlin/io/github/manamiproject/modb/app/downloadcontrolstate/DefaultDownloadControlStateUpdaterTest.kt
@@ -496,7 +496,7 @@ internal class DefaultDownloadControlStateUpdaterTest {
                         "新世紀エヴァンゲリオン劇場版 THE END OF EVANGELION",
                     ),
                     _relatedAnime = hashSetOf(
-                        URI("https://anilist.co/anime/30"),
+                        RelatedAnime(URI("https://anilist.co/anime/30")),
                     ),
                     _tags = hashSetOf(
                         "action",
@@ -573,7 +573,7 @@ internal class DefaultDownloadControlStateUpdaterTest {
                         "新世紀エヴァンゲリオン劇場版 THE END OF EVANGELION",
                     ),
                     _relatedAnime = hashSetOf(
-                        URI("https://anilist.co/anime/30"),
+                        RelatedAnime(URI("https://anilist.co/anime/30")),
                     ),
                     _tags = hashSetOf(
                         "action",
@@ -668,7 +668,7 @@ internal class DefaultDownloadControlStateUpdaterTest {
                         "新世紀エヴァンゲリオン劇場版 THE END OF EVANGELION",
                     ),
                     _relatedAnime = hashSetOf(
-                        URI("https://anilist.co/anime/30"),
+                        RelatedAnime(URI("https://anilist.co/anime/30")),
                     ),
                     _tags = hashSetOf(
                         "action",
diff --git a/lib/src/test/kotlin/io/github/manamiproject/modb/app/downloadcontrolstate/DownloadControlStateEntryTest.kt b/lib/src/test/kotlin/io/github/manamiproject/modb/app/downloadcontrolstate/DownloadControlStateEntryTest.kt
index 6426b7e8..1b9e6db3 100644
--- a/lib/src/test/kotlin/io/github/manamiproject/modb/app/downloadcontrolstate/DownloadControlStateEntryTest.kt
+++ b/lib/src/test/kotlin/io/github/manamiproject/modb/app/downloadcontrolstate/DownloadControlStateEntryTest.kt
@@ -470,14 +470,14 @@ internal class DownloadControlStateEntryTest {
                 _nextDownload = WeekOfYear.currentWeek(),
                 _anime = AnimeRaw(
                     _title = "title",
-                    _relatedAnime = hashSetOf(URI("https://example.org/anime/some-title")),
+                    _relatedAnime = hashSetOf(RelatedAnime(URI("https://example.org/anime/some-title"))),
                 ),
             )
 
             val newAnime = downloadControlStateEntry.anime.copy(
                 _relatedAnime = hashSetOf(
-                    URI("https://example.org/anime/some-title"),
-                    URI("https://example.org/anime/additional-title"),
+                    RelatedAnime(URI("https://example.org/anime/some-title")),
+                    RelatedAnime(URI("https://example.org/anime/additional-title")),
                 ),
             )
 
@@ -902,7 +902,7 @@ internal class DownloadControlStateEntryTest {
                 _nextDownload = WeekOfYear.currentWeek(),
                 _anime = AnimeRaw(
                     _title = "Test",
-                    _relatedAnime = hashSetOf(URI("https://example.org/real1"))
+                    _relatedAnime = hashSetOf(RelatedAnime(URI("https://example.org/real1")))
                 ),
             )
 
@@ -980,7 +980,7 @@ internal class DownloadControlStateEntryTest {
                         "Clannad: After Story OVA",
                         "クラナド　アフターストーリー　もうひとつの世界　杏編",
                     ),
-                    _relatedAnime = hashSetOf(URI("https://myanimelist.net/anime/2167")),
+                    _relatedAnime = hashSetOf(RelatedAnime(URI("https://myanimelist.net/anime/2167"))),
                     _tags = hashSetOf(
                         "comedy",
                         "drama",
@@ -1027,7 +1027,7 @@ internal class DownloadControlStateEntryTest {
                         "Clannad: After Story OVA",
                         "クラナド　アフターストーリー　もうひとつの世界　杏編",
                     ),
-                    _relatedAnime = hashSetOf(URI("https://myanimelist.net/anime/2167")),
+                    _relatedAnime = hashSetOf(RelatedAnime(URI("https://myanimelist.net/anime/2167"))),
                     _tags = hashSetOf(
                         "comedy",
                         "drama",
diff --git a/lib/src/test/kotlin/io/github/manamiproject/modb/app/merging/DefaultMergingServiceTest.kt b/lib/src/test/kotlin/io/github/manamiproject/modb/app/merging/DefaultMergingServiceTest.kt
index d1b694b4..77942aa0 100644
--- a/lib/src/test/kotlin/io/github/manamiproject/modb/app/merging/DefaultMergingServiceTest.kt
+++ b/lib/src/test/kotlin/io/github/manamiproject/modb/app/merging/DefaultMergingServiceTest.kt
@@ -1,5 +1,6 @@
 package io.github.manamiproject.modb.app.merging
 
+import io.github.manamiproject.modb.core.anime.RelatedAnime
 import io.github.manamiproject.modb.app.TestAppConfig
 import io.github.manamiproject.modb.app.TestMergeLockAccessor
 import io.github.manamiproject.modb.app.config.AppConfig
@@ -51,8 +52,8 @@ internal class DefaultMergingServiceTest {
                         "イレブンアイズ",
                     ),
                     _relatedAnime = hashSetOf(
-                        URI("https://anilist.co/anime/110465"),
-                        URI("https://anilist.co/anime/7739"),
+                        RelatedAnime(URI("https://anilist.co/anime/110465")),
+                        RelatedAnime(URI("https://anilist.co/anime/7739")),
                     ),
                 )
 
@@ -102,8 +103,8 @@ internal class DefaultMergingServiceTest {
                         "11eyes イレブンアイズ",
                     ),
                     _relatedAnime = hashSetOf(
-                        URI("https://myanimelist.net/anime/20557"),
-                        URI("https://myanimelist.net/anime/7739"),
+                        RelatedAnime(URI("https://myanimelist.net/anime/20557")),
+                        RelatedAnime(URI("https://myanimelist.net/anime/7739")),
                     ),
                 )
 
@@ -167,9 +168,9 @@ internal class DefaultMergingServiceTest {
                         "星界之纹章",
                     ),
                     _relatedAnime = hashSetOf(
-                        URI("https://anidb.net/anime/1623"),
-                        URI("https://anidb.net/anime/4"),
-                        URI("https://anidb.net/anime/6"),
+                        RelatedAnime(URI("https://anidb.net/anime/1623")),
+                        RelatedAnime(URI("https://anidb.net/anime/4")),
+                        RelatedAnime(URI("https://anidb.net/anime/6")),
                     ),
                 )
 
@@ -190,9 +191,9 @@ internal class DefaultMergingServiceTest {
                         "カウボーイビバップ",
                     ),
                     _relatedAnime = hashSetOf(
-                        URI("https://myanimelist.net/anime/17205"),
-                        URI("https://myanimelist.net/anime/4037"),
-                        URI("https://myanimelist.net/anime/5"),
+                        RelatedAnime(URI("https://myanimelist.net/anime/17205")),
+                        RelatedAnime(URI("https://myanimelist.net/anime/4037")),
+                        RelatedAnime(URI("https://myanimelist.net/anime/5")),
                     ),
                 )
 
@@ -239,8 +240,8 @@ internal class DefaultMergingServiceTest {
                         "イレブンアイズ",
                     ),
                     _relatedAnime = hashSetOf(
-                        URI("https://anilist.co/anime/110465"),
-                        URI("https://anilist.co/anime/7739"),
+                        RelatedAnime(URI("https://anilist.co/anime/110465")),
+                        RelatedAnime(URI("https://anilist.co/anime/7739")),
                     ),
                 )
 
@@ -262,10 +263,10 @@ internal class DefaultMergingServiceTest {
                         "劇場版“文学少女”",
                     ),
                     _relatedAnime = hashSetOf(
-                        URI("https://kitsu.app/anime/5078"),
-                        URI("https://kitsu.app/anime/5352"),
-                        URI("https://myanimelist.net/anime/7669"),
-                        URI("https://myanimelist.net/anime/8481"),
+                        RelatedAnime(URI("https://kitsu.app/anime/5078")),
+                        RelatedAnime(URI("https://kitsu.app/anime/5352")),
+                        RelatedAnime(URI("https://myanimelist.net/anime/7669")),
+                        RelatedAnime(URI("https://myanimelist.net/anime/8481")),
                     ),
                 )
 
@@ -423,9 +424,9 @@ internal class DefaultMergingServiceTest {
                         "カウボーイビバップ",
                     ),
                     _relatedAnime = hashSetOf(
-                        URI("https://myanimelist.net/anime/17205"),
-                        URI("https://myanimelist.net/anime/4037"),
-                        URI("https://myanimelist.net/anime/5"),
+                        RelatedAnime(URI("https://myanimelist.net/anime/17205")),
+                        RelatedAnime(URI("https://myanimelist.net/anime/4037")),
+                        RelatedAnime(URI("https://myanimelist.net/anime/5")),
                     ),
                 )
 
diff --git a/lib/src/test/kotlin/io/github/manamiproject/modb/app/merging/goldenrecords/DefaultGoldenRecordAccessorTest.kt b/lib/src/test/kotlin/io/github/manamiproject/modb/app/merging/goldenrecords/DefaultGoldenRecordAccessorTest.kt
index 0366cbd4..409be2ae 100644
--- a/lib/src/test/kotlin/io/github/manamiproject/modb/app/merging/goldenrecords/DefaultGoldenRecordAccessorTest.kt
+++ b/lib/src/test/kotlin/io/github/manamiproject/modb/app/merging/goldenrecords/DefaultGoldenRecordAccessorTest.kt
@@ -1,5 +1,6 @@
 package io.github.manamiproject.modb.app.merging.goldenrecords
 
+import io.github.manamiproject.modb.core.anime.RelatedAnime
 import io.github.manamiproject.modb.core.anime.AnimeRaw
 import io.github.manamiproject.modb.core.anime.AnimeType.*
 import io.github.manamiproject.modb.core.anime.Duration
@@ -86,8 +87,8 @@ internal class DefaultGoldenRecordAccessorTest {
                     "劇場版総集編【前編】メイドインアビス 旅立ちの夜明け",
                 ),
                 _relatedAnime = hashSetOf(
-                    URI("https://myanimelist.net/anime/34599"),
-                    URI("https://myanimelist.net/anime/37515"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/34599")),
+                    RelatedAnime(URI("https://myanimelist.net/anime/37515")),
                 )
             )
 
@@ -120,8 +121,8 @@ internal class DefaultGoldenRecordAccessorTest {
                     "劇場版総集編【前編】メイドインアビス 旅立ちの夜明け",
                 ),
                 _relatedAnime = hashSetOf(
-                    URI("https://myanimelist.net/anime/34599"),
-                    URI("https://myanimelist.net/anime/37515"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/34599")),
+                    RelatedAnime(URI("https://myanimelist.net/anime/37515")),
                 )
             )
 
@@ -247,9 +248,9 @@ internal class DefaultGoldenRecordAccessorTest {
                     "メイドインアビス",
                 ),
                 _relatedAnime = hashSetOf(
-                    URI("https://myanimelist.net/anime/36862"),
-                    URI("https://myanimelist.net/anime/37514"),
-                    URI("https://myanimelist.net/anime/37515"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/36862")),
+                    RelatedAnime(URI("https://myanimelist.net/anime/37514")),
+                    RelatedAnime(URI("https://myanimelist.net/anime/37515")),
                 ),
             )
 
@@ -267,8 +268,8 @@ internal class DefaultGoldenRecordAccessorTest {
                     "劇場版総集編【前編】メイドインアビス 旅立ちの夜明け",
                 ),
                 _relatedAnime = hashSetOf(
-                    URI("https://myanimelist.net/anime/34599"),
-                    URI("https://myanimelist.net/anime/37515"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/34599")),
+                    RelatedAnime(URI("https://myanimelist.net/anime/37515")),
                 ),
             )
 
@@ -289,7 +290,7 @@ internal class DefaultGoldenRecordAccessorTest {
                     "宇宙よりも遠い場所",
                 ),
                 _relatedAnime = hashSetOf(
-                    URI("https://myanimelist.net/anime/37123"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/37123")),
                 ),
             )
 
@@ -307,7 +308,7 @@ internal class DefaultGoldenRecordAccessorTest {
                     "宇宙よりも遠い場所 予告 WEB限定",
                 ),
                 _relatedAnime = hashSetOf(
-                    URI("https://myanimelist.net/anime/35839"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/35839")),
                 ),
             )
 
@@ -363,7 +364,7 @@ internal class DefaultGoldenRecordAccessorTest {
                     "宇宙よりも遠い場所",
                 ),
                 _relatedAnime = hashSetOf(
-                    URI("https://myanimelist.net/anime/37123"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/37123")),
                 ),
             )
 
@@ -599,8 +600,8 @@ internal class DefaultGoldenRecordAccessorTest {
                     "劇場版総集編【前編】メイドインアビス 旅立ちの夜明け",
                 ),
                 _relatedAnime = hashSetOf(
-                    URI("https://myanimelist.net/anime/34599"),
-                    URI("https://myanimelist.net/anime/37515"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/34599")),
+                    RelatedAnime(URI("https://myanimelist.net/anime/37515")),
                 )
             )
 
@@ -701,8 +702,8 @@ internal class DefaultGoldenRecordAccessorTest {
                     "劇場版総集編【前編】メイドインアビス 旅立ちの夜明け",
                 ),
                 _relatedAnime = hashSetOf(
-                    URI("https://myanimelist.net/anime/34599"),
-                    URI("https://myanimelist.net/anime/37515"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/34599")),
+                    RelatedAnime(URI("https://myanimelist.net/anime/37515")),
                 )
             )
 
@@ -746,8 +747,8 @@ internal class DefaultGoldenRecordAccessorTest {
                     "劇場版総集編【前編】メイドインアビス 旅立ちの夜明け"
                 ),
                 _relatedAnime = hashSetOf(
-                    URI("https://myanimelist.net/anime/34599"),
-                    URI("https://myanimelist.net/anime/37515"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/34599")),
+                    RelatedAnime(URI("https://myanimelist.net/anime/37515")),
                 ),
             )
 
@@ -766,8 +767,8 @@ internal class DefaultGoldenRecordAccessorTest {
                     "劇場版総集編【後編】メイドインアビス 放浪する黄昏",
                 ),
                 _relatedAnime = hashSetOf(
-                    URI("https://myanimelist.net/anime/34599"),
-                    URI("https://myanimelist.net/anime/37515"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/34599")),
+                    RelatedAnime(URI("https://myanimelist.net/anime/37515")),
                 )
             )
 
@@ -788,7 +789,7 @@ internal class DefaultGoldenRecordAccessorTest {
                     "宇宙よりも遠い場所",
                 ),
                 _relatedAnime = hashSetOf(
-                    URI("https://myanimelist.net/anime/37123"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/37123")),
                 ),
             )
 
@@ -806,7 +807,7 @@ internal class DefaultGoldenRecordAccessorTest {
                     "宇宙よりも遠い場所 予告 WEB限定",
                 ),
                 _relatedAnime = hashSetOf(
-                    URI("https://myanimelist.net/anime/35839"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/35839")),
                 )
             )
 
@@ -856,7 +857,7 @@ internal class DefaultGoldenRecordAccessorTest {
                     "宇宙よりも遠い場所",
                 ),
                 _relatedAnime = hashSetOf(
-                    URI("https://myanimelist.net/anime/37123"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/37123")),
                 ),
             )
 
@@ -958,7 +959,7 @@ internal class DefaultGoldenRecordAccessorTest {
                 ),
                 _title = "Death Note",
                 _relatedAnime = hashSetOf(
-                    URI("https://myanimelist.net/anime/2994"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/2994")),
                 ),
             )
 
@@ -971,8 +972,8 @@ internal class DefaultGoldenRecordAccessorTest {
                 ),
                 _title = "Death Note",
                 _relatedAnime = hashSetOf(
-                    URI("https://anidb.net/anime/8146"),
-                    URI("https://anidb.net/anime/8147"),
+                    RelatedAnime(URI("https://anidb.net/anime/8146")),
+                    RelatedAnime(URI("https://anidb.net/anime/8147")),
                 ),
             )
 
@@ -984,10 +985,10 @@ internal class DefaultGoldenRecordAccessorTest {
                 URI("https://anidb.net/anime/4563"),
                 URI("https://myanimelist.net/anime/1535"),
             )
-            assertThat(result.relatedAnime).containsExactly(
-                URI("https://anidb.net/anime/8146"),
-                URI("https://anidb.net/anime/8147"),
-                URI("https://myanimelist.net/anime/2994"),
+            assertThat(result.relatedAnime).containsExactlyInAnyOrder(
+                RelatedAnime(URI("https://anidb.net/anime/8146")),
+                RelatedAnime(URI("https://anidb.net/anime/8147")),
+                RelatedAnime(URI("https://myanimelist.net/anime/2994")),
             )
         }
 
@@ -1002,7 +1003,7 @@ internal class DefaultGoldenRecordAccessorTest {
                 ),
                 _title = "Death Note",
                 _relatedAnime = hashSetOf(
-                    URI("https://myanimelist.net/anime/2994"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/2994")),
                 ),
             )
 
@@ -1015,8 +1016,8 @@ internal class DefaultGoldenRecordAccessorTest {
                 ),
                 _title = "Death Note",
                 _relatedAnime = hashSetOf(
-                    URI("https://myanimelist.net/anime/1535"),
-                    URI("https://anidb.net/anime/8147"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/1535")),
+                    RelatedAnime(URI("https://anidb.net/anime/8147")),
                 ),
             )
 
@@ -1028,9 +1029,9 @@ internal class DefaultGoldenRecordAccessorTest {
                 URI("https://anidb.net/anime/4563"),
                 URI("https://myanimelist.net/anime/1535"),
             )
-            assertThat(result.relatedAnime).containsExactly(
-                URI("https://anidb.net/anime/8147"),
-                URI("https://myanimelist.net/anime/2994"),
+            assertThat(result.relatedAnime).containsExactlyInAnyOrder(
+                RelatedAnime(URI("https://anidb.net/anime/8147")),
+                RelatedAnime(URI("https://myanimelist.net/anime/2994")),
             )
         }
 
diff --git a/lib/src/test/kotlin/io/github/manamiproject/modb/app/merging/matching/DefaultMatchingProbabilityCalculatorTest.kt b/lib/src/test/kotlin/io/github/manamiproject/modb/app/merging/matching/DefaultMatchingProbabilityCalculatorTest.kt
index 50b65e64..49b934ce 100644
--- a/lib/src/test/kotlin/io/github/manamiproject/modb/app/merging/matching/DefaultMatchingProbabilityCalculatorTest.kt
+++ b/lib/src/test/kotlin/io/github/manamiproject/modb/app/merging/matching/DefaultMatchingProbabilityCalculatorTest.kt
@@ -301,9 +301,9 @@ internal class DefaultMatchingProbabilityCalculatorTest {
                         "カウボーイビバップ",
                     ),
                     _relatedAnime = hashSetOf(
-                        URI("https://myanimelist.net/anime/17205"),
-                        URI("https://myanimelist.net/anime/4037"),
-                        URI("https://myanimelist.net/anime/5"),
+                        RelatedAnime(URI("https://myanimelist.net/anime/17205")),
+                        RelatedAnime(URI("https://myanimelist.net/anime/4037")),
+                        RelatedAnime(URI("https://myanimelist.net/anime/5")),
                     ),
                 )
 
@@ -346,9 +346,9 @@ internal class DefaultMatchingProbabilityCalculatorTest {
                         "カウボーイビバップ",
                     ),
                     _relatedAnime = hashSetOf(
-                        URI("https://myanimelist.net/anime/17205"),
-                        URI("https://myanimelist.net/anime/4037"),
-                        URI("https://myanimelist.net/anime/5"),
+                        RelatedAnime(URI("https://myanimelist.net/anime/17205")),
+                        RelatedAnime(URI("https://myanimelist.net/anime/4037")),
+                        RelatedAnime(URI("https://myanimelist.net/anime/5")),
                     ),
                 )
 
@@ -393,9 +393,9 @@ internal class DefaultMatchingProbabilityCalculatorTest {
                         "カウボーイビバップ",
                     ),
                     _relatedAnime = hashSetOf(
-                        URI("https://myanimelist.net/anime/17205"),
-                        URI("https://myanimelist.net/anime/4037"),
-                        URI("https://myanimelist.net/anime/5"),
+                        RelatedAnime(URI("https://myanimelist.net/anime/17205")),
+                        RelatedAnime(URI("https://myanimelist.net/anime/4037")),
+                        RelatedAnime(URI("https://myanimelist.net/anime/5")),
                     ),
                 )
 
@@ -444,9 +444,9 @@ internal class DefaultMatchingProbabilityCalculatorTest {
                         "カウボーイビバップ",
                     ),
                     _relatedAnime = hashSetOf(
-                        URI("https://myanimelist.net/anime/17205"),
-                        URI("https://myanimelist.net/anime/4037"),
-                        URI("https://myanimelist.net/anime/5"),
+                        RelatedAnime(URI("https://myanimelist.net/anime/17205")),
+                        RelatedAnime(URI("https://myanimelist.net/anime/4037")),
+                        RelatedAnime(URI("https://myanimelist.net/anime/5")),
                     ),
                 )
 
@@ -491,9 +491,9 @@ internal class DefaultMatchingProbabilityCalculatorTest {
                         "カウボーイビバップ",
                     ),
                     _relatedAnime = hashSetOf(
-                        URI("https://myanimelist.net/anime/17205"),
-                        URI("https://myanimelist.net/anime/4037"),
-                        URI("https://myanimelist.net/anime/5"),
+                        RelatedAnime(URI("https://myanimelist.net/anime/17205")),
+                        RelatedAnime(URI("https://myanimelist.net/anime/4037")),
+                        RelatedAnime(URI("https://myanimelist.net/anime/5")),
                     ),
                 )
 
@@ -538,9 +538,9 @@ internal class DefaultMatchingProbabilityCalculatorTest {
                         "カウボーイビバップ",
                     ),
                     _relatedAnime = hashSetOf(
-                        URI("https://myanimelist.net/anime/17205"),
-                        URI("https://myanimelist.net/anime/4037"),
-                        URI("https://myanimelist.net/anime/5"),
+                        RelatedAnime(URI("https://myanimelist.net/anime/17205")),
+                        RelatedAnime(URI("https://myanimelist.net/anime/4037")),
+                        RelatedAnime(URI("https://myanimelist.net/anime/5")),
                     ),
                 )
 
@@ -585,9 +585,9 @@ internal class DefaultMatchingProbabilityCalculatorTest {
                         "カウボーイビバップ",
                     ),
                     _relatedAnime = hashSetOf(
-                        URI("https://myanimelist.net/anime/17205"),
-                        URI("https://myanimelist.net/anime/4037"),
-                        URI("https://myanimelist.net/anime/5"),
+                        RelatedAnime(URI("https://myanimelist.net/anime/17205")),
+                        RelatedAnime(URI("https://myanimelist.net/anime/4037")),
+                        RelatedAnime(URI("https://myanimelist.net/anime/5")),
                     ),
                 )
 
@@ -634,9 +634,9 @@ internal class DefaultMatchingProbabilityCalculatorTest {
                         "カウボーイビバップ",
                     ),
                     _relatedAnime = hashSetOf(
-                        URI("https://myanimelist.net/anime/17205"),
-                        URI("https://myanimelist.net/anime/4037"),
-                        URI("https://myanimelist.net/anime/5"),
+                        RelatedAnime(URI("https://myanimelist.net/anime/17205")),
+                        RelatedAnime(URI("https://myanimelist.net/anime/4037")),
+                        RelatedAnime(URI("https://myanimelist.net/anime/5")),
                     ),
                 )
 
@@ -684,9 +684,9 @@ internal class DefaultMatchingProbabilityCalculatorTest {
                         "カウボーイビバップ",
                     ),
                     _relatedAnime = hashSetOf(
-                        URI("https://myanimelist.net/anime/17205"),
-                        URI("https://myanimelist.net/anime/4037"),
-                        URI("https://myanimelist.net/anime/5"),
+                        RelatedAnime(URI("https://myanimelist.net/anime/17205")),
+                        RelatedAnime(URI("https://myanimelist.net/anime/4037")),
+                        RelatedAnime(URI("https://myanimelist.net/anime/5")),
                     ),
                 )
 
@@ -734,9 +734,9 @@ internal class DefaultMatchingProbabilityCalculatorTest {
                         "カウボーイビバップ",
                     ),
                     _relatedAnime = hashSetOf(
-                        URI("https://myanimelist.net/anime/17205"),
-                        URI("https://myanimelist.net/anime/4037"),
-                        URI("https://myanimelist.net/anime/5"),
+                        RelatedAnime(URI("https://myanimelist.net/anime/17205")),
+                        RelatedAnime(URI("https://myanimelist.net/anime/4037")),
+                        RelatedAnime(URI("https://myanimelist.net/anime/5")),
                     ),
                 )
 
diff --git a/lib/src/test/kotlin/io/github/manamiproject/modb/app/relatedanime/DefaultUnknownRelatedAnimeRemoverTest.kt b/lib/src/test/kotlin/io/github/manamiproject/modb/app/relatedanime/DefaultUnknownRelatedAnimeRemoverTest.kt
index 115dc113..89337ad5 100644
--- a/lib/src/test/kotlin/io/github/manamiproject/modb/app/relatedanime/DefaultUnknownRelatedAnimeRemoverTest.kt
+++ b/lib/src/test/kotlin/io/github/manamiproject/modb/app/relatedanime/DefaultUnknownRelatedAnimeRemoverTest.kt
@@ -1,5 +1,6 @@
 package io.github.manamiproject.modb.app.relatedanime
 
+import io.github.manamiproject.modb.core.anime.RelatedAnime
 import io.github.manamiproject.modb.core.anime.AnimeRaw
 import io.github.manamiproject.modb.test.tempDirectory
 import org.assertj.core.api.Assertions.assertThat
@@ -23,10 +24,10 @@ internal class DefaultUnknownRelatedAnimeRemoverTest {
                         URI("http://config2.example.org/anime/first-entry"),
                     ),
                     _relatedAnime = hashSetOf(
-                        URI("http://config1.example.org/anime/2"),
-                        URI("http://config1.example.org/anime/25"),
-                        URI("http://config2.example.org/anime/second-entry"),
-                        URI("http://config2.example.org/anime/non-existent-entry"),
+                        RelatedAnime(URI("http://config1.example.org/anime/2")),
+                        RelatedAnime(URI("http://config1.example.org/anime/25")),
+                        RelatedAnime(URI("http://config2.example.org/anime/second-entry")),
+                        RelatedAnime(URI("http://config2.example.org/anime/non-existent-entry")),
                     )
                 ),
                 AnimeRaw(
@@ -36,9 +37,9 @@ internal class DefaultUnknownRelatedAnimeRemoverTest {
                         URI("http://config2.example.org/anime/second-entry"),
                     ),
                     _relatedAnime = hashSetOf(
-                        URI("http://config1.example.org/anime/1"),
-                        URI("http://config1.example.org/anime/25"),
-                        URI("http://config2.example.org/anime/first-entry"),
+                        RelatedAnime(URI("http://config1.example.org/anime/1")),
+                        RelatedAnime(URI("http://config1.example.org/anime/25")),
+                        RelatedAnime(URI("http://config2.example.org/anime/first-entry")),
                     ),
                 ),
                 AnimeRaw(
@@ -47,7 +48,7 @@ internal class DefaultUnknownRelatedAnimeRemoverTest {
                         URI("http://config2.example.org/anime/third-entry"),
                     ),
                     _relatedAnime = hashSetOf(
-                        URI("http://config2.example.org/anime/non-existent-entry"),
+                        RelatedAnime(URI("http://config2.example.org/anime/non-existent-entry")),
                     ),
                 ),
             )
@@ -59,12 +60,12 @@ internal class DefaultUnknownRelatedAnimeRemoverTest {
 
             // then
             assertThat(result.find { it.title == "1" }!!.relatedAnime).containsExactlyInAnyOrder(
-                URI("http://config1.example.org/anime/2"),
-                URI("http://config2.example.org/anime/second-entry"),
+                RelatedAnime(URI("http://config1.example.org/anime/2")),
+                RelatedAnime(URI("http://config2.example.org/anime/second-entry")),
             )
             assertThat(result.find { it.title == "2" }!!.relatedAnime).containsExactlyInAnyOrder(
-                URI("http://config1.example.org/anime/1"),
-                URI("http://config2.example.org/anime/first-entry"),
+                RelatedAnime(URI("http://config1.example.org/anime/1")),
+                RelatedAnime(URI("http://config2.example.org/anime/first-entry")),
             )
             assertThat(result.find { it.title == "3" }!!.relatedAnime).isEmpty()
         }
diff --git a/lib/src/test/kotlin/io/github/manamiproject/modb/app/synonyms/DefaultAmbiguousSynonymRemoverTest.kt b/lib/src/test/kotlin/io/github/manamiproject/modb/app/synonyms/DefaultAmbiguousSynonymRemoverTest.kt
index 3511aea1..ad57eb10 100644
--- a/lib/src/test/kotlin/io/github/manamiproject/modb/app/synonyms/DefaultAmbiguousSynonymRemoverTest.kt
+++ b/lib/src/test/kotlin/io/github/manamiproject/modb/app/synonyms/DefaultAmbiguousSynonymRemoverTest.kt
@@ -1,5 +1,6 @@
 package io.github.manamiproject.modb.app.synonyms
 
+import io.github.manamiproject.modb.core.anime.RelatedAnime
 import io.github.manamiproject.modb.core.anime.AnimeRaw
 import org.assertj.core.api.Assertions.assertThat
 import org.junit.jupiter.api.Nested
@@ -18,13 +19,13 @@ internal class DefaultAmbiguousSynonymRemoverTest {
                 _title = "Clevatess: Majuu no Ou to Akago to Shikabane no Yuusha",
                 _sources = hashSetOf(URI("http://example.org/anime/1")),
                 _synonyms = hashSetOf("Clevatess"),
-                _relatedAnime = hashSetOf(URI("http://example.org/anime/2")),
+                _relatedAnime = hashSetOf(RelatedAnime(URI("http://example.org/anime/2"))),
             )
             val season2 = AnimeRaw(
                 _title = "Clevatess II: Majuu no Ou to Itsuwari no Yuusha Denshou",
                 _sources = hashSetOf(URI("http://example.org/anime/2")),
                 _synonyms = hashSetOf("Clevatess", "Clevatess Season 2"),
-                _relatedAnime = hashSetOf(URI("http://example.org/anime/1")),
+                _relatedAnime = hashSetOf(RelatedAnime(URI("http://example.org/anime/1"))),
             )
 
             // when
@@ -42,7 +43,7 @@ internal class DefaultAmbiguousSynonymRemoverTest {
                 _title = "Jibaku Shounen Hanako-kun",
                 _sources = hashSetOf(URI("http://example.org/anime/1")),
                 _synonyms = hashSetOf("Toilet-bound Hanako-kun", "地縛少年花子くん"),
-                _relatedAnime = hashSetOf(URI("http://example.org/anime/2")),
+                _relatedAnime = hashSetOf(RelatedAnime(URI("http://example.org/anime/2"))),
             )
             val season2 = AnimeRaw(
                 _title = "Jibaku Shounen Hanako-kun 2",
@@ -53,7 +54,7 @@ internal class DefaultAmbiguousSynonymRemoverTest {
                     "地縛少年花子くん",
                     "地縛少年花子くん 第2期",
                 ),
-                _relatedAnime = hashSetOf(URI("http://example.org/anime/1")),
+                _relatedAnime = hashSetOf(RelatedAnime(URI("http://example.org/anime/1"))),
             )
 
             // when
@@ -73,12 +74,12 @@ internal class DefaultAmbiguousSynonymRemoverTest {
                 _title = "Monster: The Perfect Edition",
                 _sources = hashSetOf(URI("http://example.org/anime/1")),
                 _synonyms = hashSetOf("Monster", "Monster 2"),
-                _relatedAnime = hashSetOf(URI("http://example.org/anime/2")),
+                _relatedAnime = hashSetOf(RelatedAnime(URI("http://example.org/anime/2"))),
             )
             val unrelatedName = AnimeRaw(
                 _title = "Naoki Urasawa",
                 _sources = hashSetOf(URI("http://example.org/anime/2")),
-                _relatedAnime = hashSetOf(URI("http://example.org/anime/1")),
+                _relatedAnime = hashSetOf(RelatedAnime(URI("http://example.org/anime/1"))),
             )
 
             // when
@@ -95,13 +96,13 @@ internal class DefaultAmbiguousSynonymRemoverTest {
                 _title = "Kikou Kantai Dairugger XV",
                 _sources = hashSetOf(URI("http://example.org/anime/1")),
                 _synonyms = hashSetOf("Voltron"),
-                _relatedAnime = hashSetOf(URI("http://example.org/anime/2")),
+                _relatedAnime = hashSetOf(RelatedAnime(URI("http://example.org/anime/2"))),
             )
             val second = AnimeRaw(
                 _title = "Hyakujuu-Ou GoLion",
                 _sources = hashSetOf(URI("http://example.org/anime/2")),
                 _synonyms = hashSetOf("Voltron"),
-                _relatedAnime = hashSetOf(URI("http://example.org/anime/1")),
+                _relatedAnime = hashSetOf(RelatedAnime(URI("http://example.org/anime/1"))),
             )
 
             // when
@@ -119,13 +120,13 @@ internal class DefaultAmbiguousSynonymRemoverTest {
                 _title = "Hunter x Hunter",
                 _sources = hashSetOf(URI("http://example.org/anime/1")),
                 _synonyms = hashSetOf("Hunter x Hunter (1999)"),
-                _relatedAnime = hashSetOf(URI("http://example.org/anime/2")),
+                _relatedAnime = hashSetOf(RelatedAnime(URI("http://example.org/anime/2"))),
             )
             val remake = AnimeRaw(
                 _title = "Hunter x Hunter (2011)",
                 _sources = hashSetOf(URI("http://example.org/anime/2")),
                 _synonyms = hashSetOf("Hunter x Hunter"),
-                _relatedAnime = hashSetOf(URI("http://example.org/anime/1")),
+                _relatedAnime = hashSetOf(RelatedAnime(URI("http://example.org/anime/1"))),
             )
 
             // when
@@ -142,13 +143,13 @@ internal class DefaultAmbiguousSynonymRemoverTest {
                 _title = "Ashita no Joe",
                 _sources = hashSetOf(URI("http://example.org/anime/1")),
                 _synonyms = hashSetOf("Rocky Joe", "Rocky Joe 1"),
-                _relatedAnime = hashSetOf(URI("http://example.org/anime/2")),
+                _relatedAnime = hashSetOf(RelatedAnime(URI("http://example.org/anime/2"))),
             )
             val season2 = AnimeRaw(
                 _title = "Ashita no Joe 2",
                 _sources = hashSetOf(URI("http://example.org/anime/2")),
                 _synonyms = hashSetOf("Rocky Joe", "Rocky Joe 2"),
-                _relatedAnime = hashSetOf(URI("http://example.org/anime/1")),
+                _relatedAnime = hashSetOf(RelatedAnime(URI("http://example.org/anime/1"))),
             )
 
             // when
@@ -182,7 +183,7 @@ internal class DefaultAmbiguousSynonymRemoverTest {
                 _title = "Clevatess II",
                 _sources = hashSetOf(URI("http://example.org/anime/1")),
                 _synonyms = hashSetOf("Clevatess", "Clevatess Season 2"),
-                _relatedAnime = hashSetOf(URI("http://example.org/anime/unknown")),
+                _relatedAnime = hashSetOf(RelatedAnime(URI("http://example.org/anime/unknown"))),
             )
 
             // when
@@ -199,13 +200,13 @@ internal class DefaultAmbiguousSynonymRemoverTest {
                 _title = "Kyouryuu Shoujo Gauko",
                 _sources = hashSetOf(URI("http://example.org/anime/1")),
                 _synonyms = hashSetOf("\u6050\u7adc\u5c11\u5973\u30ac\u30a6\u5b50"),
-                _relatedAnime = hashSetOf(URI("http://example.org/anime/2")),
+                _relatedAnime = hashSetOf(RelatedAnime(URI("http://example.org/anime/2"))),
             )
             val season2 = AnimeRaw(
                 _title = "Kyouryuu Shoujo Gauko 2nd Season",
                 _sources = hashSetOf(URI("http://example.org/anime/2")),
                 _synonyms = hashSetOf("\u6050\u7adc\u5c11\u5973\u30ac\u30a6\u5b50", "\u6050\u7adc\u5c11\u5973\u30ac\u30a6\u5b50 \uff12"),
-                _relatedAnime = hashSetOf(URI("http://example.org/anime/1")),
+                _relatedAnime = hashSetOf(RelatedAnime(URI("http://example.org/anime/1"))),
             )
 
             // when
@@ -222,7 +223,7 @@ internal class DefaultAmbiguousSynonymRemoverTest {
                 _title = "Sengoku Youko",
                 _sources = hashSetOf(URI("http://example.org/anime/1")),
                 _synonyms = hashSetOf("\u6226\u56fd\u5996\u72d0 \u4e16\u76f4\u3057\u59c9\u5f1f\u7de8"),
-                _relatedAnime = hashSetOf(URI("http://example.org/anime/2")),
+                _relatedAnime = hashSetOf(RelatedAnime(URI("http://example.org/anime/2"))),
             )
             val recap = AnimeRaw(
                 _title = "Sengoku Youko: Yonaoshi Kyoudai-hen Recap",
@@ -231,7 +232,7 @@ internal class DefaultAmbiguousSynonymRemoverTest {
                     "\u6226\u56fd\u5996\u72d0\u3000\u4e16\u76f4\u3057\u59c9\u5f1f\u7de8",
                     "\u6226\u56fd\u5996\u72d0\u3000\u4e16\u76f4\u3057\u59c9\u5f1f\u7de8 \u7b2c2\u671f",
                 ),
-                _relatedAnime = hashSetOf(URI("http://example.org/anime/1")),
+                _relatedAnime = hashSetOf(RelatedAnime(URI("http://example.org/anime/1"))),
             )
 
             // when
diff --git a/lib/src/test/resources/readme/DefaultReadmeCreatorTest/animecountdown-with-zero-entries.md b/lib/src/test/resources/readme/DefaultReadmeCreatorTest/animecountdown-with-zero-entries.md
index 6d072302..de99f543 100644
--- a/lib/src/test/resources/readme/DefaultReadmeCreatorTest/animecountdown-with-zero-entries.md
+++ b/lib/src/test/resources/readme/DefaultReadmeCreatorTest/animecountdown-with-zero-entries.md
@@ -76,9 +76,16 @@ Here is a description of the types in the JSON files.
 | `synonyms`     | `String[]`                                        | no       | Alternative titles and spellings under which the anime is also known. Duplicate free (case-sensitive). Doesn't contain the `title` |
 | `studios`      | `String[]`                                        | no       | Lower case studio names. In general a duplicate free list, but might contain duplicates for different writings.                    |
 | `producers`    | `String[]`                                        | no       | Lower case producers names. Companies only. In general a duplicate free list, but might contain duplicates for different writings. |
-| `relatedAnime` | `URL[]`                                           | no       | URLs to the metadata providers for anime that are somehow related to this anime.                                                   |
+| `relatedAnime` | [RelatedAnime[]](#relatedanime)                   | no       | Anime on the metadata providers which are related to this anime, including the kind of relation if the provider names it.         |
 | `tags`         | `String[]`                                        | no       | A non-curated list of tags and genres which describe the anime. All entries are lower case.                                        |
 
+### RelatedAnime
+
+| Field      | Type     | Nullable | Description                                                                                                                                       |
+|------------|----------|----------|---------------------------------------------------------------------------------------------------------------------------------------------------|
+| `uri`      | `URL`    | no       | URL to the related anime on the metadata provider.                                                                                                |
+| `relation` | `String` | yes      | Kind of relation exactly as the metadata provider labels it, e.g. `Sequel` (myanimelist), `SEQUEL` (anilist), `sequel` (kitsu). Not unified. Missing if the provider doesn't name it. |
+
 ### AnimeSeason
 
 | Field    | Type                                                | Nullable | Description                                 |
@@ -208,21 +215,56 @@ Here are some examples showing what the files look like.
         "vap"
       ],
       "relatedAnime": [
-        "https://anidb.net/anime/8146",
-        "https://anidb.net/anime/8147",
-        "https://anilist.co/anime/20931",
-        "https://anilist.co/anime/2994",
-        "https://anime-planet.com/anime/death-note-rewrite-1-visions-of-a-god",
-        "https://anime-planet.com/anime/death-note-rewrite-2-ls-successors",
-        "https://animecountdown.com/36687",
-        "https://animecountdown.com/40690",
-        "https://anisearch.com/anime/4441",
-        "https://anisearch.com/anime/5194",
-        "https://kitsu.app/anime/2707",
-        "https://livechart.me/anime/3808",
-        "https://myanimelist.net/anime/2994",
-        "https://simkl.com/anime/36687",
-        "https://simkl.com/anime/40690"
+        {
+          "uri": "https://anidb.net/anime/8146",
+          "relation": "Summary"
+        },
+        {
+          "uri": "https://anidb.net/anime/8147",
+          "relation": "Summary"
+        },
+        {
+          "uri": "https://anilist.co/anime/20931"
+        },
+        {
+          "uri": "https://anilist.co/anime/2994",
+          "relation": "SUMMARY"
+        },
+        {
+          "uri": "https://anime-planet.com/anime/death-note-rewrite-1-visions-of-a-god"
+        },
+        {
+          "uri": "https://anime-planet.com/anime/death-note-rewrite-2-ls-successors"
+        },
+        {
+          "uri": "https://animecountdown.com/36687"
+        },
+        {
+          "uri": "https://animecountdown.com/40690"
+        },
+        {
+          "uri": "https://anisearch.com/anime/4441"
+        },
+        {
+          "uri": "https://anisearch.com/anime/5194"
+        },
+        {
+          "uri": "https://kitsu.app/anime/2707",
+          "relation": "summary"
+        },
+        {
+          "uri": "https://livechart.me/anime/3808"
+        },
+        {
+          "uri": "https://myanimelist.net/anime/2994",
+          "relation": "Summary"
+        },
+        {
+          "uri": "https://simkl.com/anime/36687"
+        },
+        {
+          "uri": "https://simkl.com/anime/40690"
+        }
       ],
       "tags": [
         "achronological order",
diff --git a/lib/src/test/resources/readme/DefaultReadmeCreatorTest/expected-default.md b/lib/src/test/resources/readme/DefaultReadmeCreatorTest/expected-default.md
index 820d7e97..392512b1 100644
--- a/lib/src/test/resources/readme/DefaultReadmeCreatorTest/expected-default.md
+++ b/lib/src/test/resources/readme/DefaultReadmeCreatorTest/expected-default.md
@@ -83,9 +83,16 @@ Here is a description of the types in the JSON files.
 | `synonyms`     | `String[]`                                        | no       | Alternative titles and spellings under which the anime is also known. Duplicate free (case-sensitive). Doesn't contain the `title` |
 | `studios`      | `String[]`                                        | no       | Lower case studio names. In general a duplicate free list, but might contain duplicates for different writings.                    |
 | `producers`    | `String[]`                                        | no       | Lower case producers names. Companies only. In general a duplicate free list, but might contain duplicates for different writings. |
-| `relatedAnime` | `URL[]`                                           | no       | URLs to the metadata providers for anime that are somehow related to this anime.                                                   |
+| `relatedAnime` | [RelatedAnime[]](#relatedanime)                   | no       | Anime on the metadata providers which are related to this anime, including the kind of relation if the provider names it.         |
 | `tags`         | `String[]`                                        | no       | A non-curated list of tags and genres which describe the anime. All entries are lower case.                                        |
 
+### RelatedAnime
+
+| Field      | Type     | Nullable | Description                                                                                                                                       |
+|------------|----------|----------|---------------------------------------------------------------------------------------------------------------------------------------------------|
+| `uri`      | `URL`    | no       | URL to the related anime on the metadata provider.                                                                                                |
+| `relation` | `String` | yes      | Kind of relation exactly as the metadata provider labels it, e.g. `Sequel` (myanimelist), `SEQUEL` (anilist), `sequel` (kitsu). Not unified. Missing if the provider doesn't name it. |
+
 ### AnimeSeason
 
 | Field    | Type                                                | Nullable | Description                                 |
@@ -215,21 +222,56 @@ Here are some examples showing what the files look like.
         "vap"
       ],
       "relatedAnime": [
-        "https://anidb.net/anime/8146",
-        "https://anidb.net/anime/8147",
-        "https://anilist.co/anime/20931",
-        "https://anilist.co/anime/2994",
-        "https://anime-planet.com/anime/death-note-rewrite-1-visions-of-a-god",
-        "https://anime-planet.com/anime/death-note-rewrite-2-ls-successors",
-        "https://animecountdown.com/36687",
-        "https://animecountdown.com/40690",
-        "https://anisearch.com/anime/4441",
-        "https://anisearch.com/anime/5194",
-        "https://kitsu.app/anime/2707",
-        "https://livechart.me/anime/3808",
-        "https://myanimelist.net/anime/2994",
-        "https://simkl.com/anime/36687",
-        "https://simkl.com/anime/40690"
+        {
+          "uri": "https://anidb.net/anime/8146",
+          "relation": "Summary"
+        },
+        {
+          "uri": "https://anidb.net/anime/8147",
+          "relation": "Summary"
+        },
+        {
+          "uri": "https://anilist.co/anime/20931"
+        },
+        {
+          "uri": "https://anilist.co/anime/2994",
+          "relation": "SUMMARY"
+        },
+        {
+          "uri": "https://anime-planet.com/anime/death-note-rewrite-1-visions-of-a-god"
+        },
+        {
+          "uri": "https://anime-planet.com/anime/death-note-rewrite-2-ls-successors"
+        },
+        {
+          "uri": "https://animecountdown.com/36687"
+        },
+        {
+          "uri": "https://animecountdown.com/40690"
+        },
+        {
+          "uri": "https://anisearch.com/anime/4441"
+        },
+        {
+          "uri": "https://anisearch.com/anime/5194"
+        },
+        {
+          "uri": "https://kitsu.app/anime/2707",
+          "relation": "summary"
+        },
+        {
+          "uri": "https://livechart.me/anime/3808"
+        },
+        {
+          "uri": "https://myanimelist.net/anime/2994",
+          "relation": "Summary"
+        },
+        {
+          "uri": "https://simkl.com/anime/36687"
+        },
+        {
+          "uri": "https://simkl.com/anime/40690"
+        }
       ],
       "tags": [
         "achronological order",
diff --git a/lib/src/test/resources/readme/DefaultReadmeCreatorTest/merge-locks.md b/lib/src/test/resources/readme/DefaultReadmeCreatorTest/merge-locks.md
index 2e312c7c..f263e9ec 100644
--- a/lib/src/test/resources/readme/DefaultReadmeCreatorTest/merge-locks.md
+++ b/lib/src/test/resources/readme/DefaultReadmeCreatorTest/merge-locks.md
@@ -83,9 +83,16 @@ Here is a description of the types in the JSON files.
 | `synonyms`     | `String[]`                                        | no       | Alternative titles and spellings under which the anime is also known. Duplicate free (case-sensitive). Doesn't contain the `title` |
 | `studios`      | `String[]`                                        | no       | Lower case studio names. In general a duplicate free list, but might contain duplicates for different writings.                    |
 | `producers`    | `String[]`                                        | no       | Lower case producers names. Companies only. In general a duplicate free list, but might contain duplicates for different writings. |
-| `relatedAnime` | `URL[]`                                           | no       | URLs to the metadata providers for anime that are somehow related to this anime.                                                   |
+| `relatedAnime` | [RelatedAnime[]](#relatedanime)                   | no       | Anime on the metadata providers which are related to this anime, including the kind of relation if the provider names it.         |
 | `tags`         | `String[]`                                        | no       | A non-curated list of tags and genres which describe the anime. All entries are lower case.                                        |
 
+### RelatedAnime
+
+| Field      | Type     | Nullable | Description                                                                                                                                       |
+|------------|----------|----------|---------------------------------------------------------------------------------------------------------------------------------------------------|
+| `uri`      | `URL`    | no       | URL to the related anime on the metadata provider.                                                                                                |
+| `relation` | `String` | yes      | Kind of relation exactly as the metadata provider labels it, e.g. `Sequel` (myanimelist), `SEQUEL` (anilist), `sequel` (kitsu). Not unified. Missing if the provider doesn't name it. |
+
 ### AnimeSeason
 
 | Field    | Type                                                | Nullable | Description                                 |
@@ -215,21 +222,56 @@ Here are some examples showing what the files look like.
         "vap"
       ],
       "relatedAnime": [
-        "https://anidb.net/anime/8146",
-        "https://anidb.net/anime/8147",
-        "https://anilist.co/anime/20931",
-        "https://anilist.co/anime/2994",
-        "https://anime-planet.com/anime/death-note-rewrite-1-visions-of-a-god",
-        "https://anime-planet.com/anime/death-note-rewrite-2-ls-successors",
-        "https://animecountdown.com/36687",
-        "https://animecountdown.com/40690",
-        "https://anisearch.com/anime/4441",
-        "https://anisearch.com/anime/5194",
-        "https://kitsu.app/anime/2707",
-        "https://livechart.me/anime/3808",
-        "https://myanimelist.net/anime/2994",
-        "https://simkl.com/anime/36687",
-        "https://simkl.com/anime/40690"
+        {
+          "uri": "https://anidb.net/anime/8146",
+          "relation": "Summary"
+        },
+        {
+          "uri": "https://anidb.net/anime/8147",
+          "relation": "Summary"
+        },
+        {
+          "uri": "https://anilist.co/anime/20931"
+        },
+        {
+          "uri": "https://anilist.co/anime/2994",
+          "relation": "SUMMARY"
+        },
+        {
+          "uri": "https://anime-planet.com/anime/death-note-rewrite-1-visions-of-a-god"
+        },
+        {
+          "uri": "https://anime-planet.com/anime/death-note-rewrite-2-ls-successors"
+        },
+        {
+          "uri": "https://animecountdown.com/36687"
+        },
+        {
+          "uri": "https://animecountdown.com/40690"
+        },
+        {
+          "uri": "https://anisearch.com/anime/4441"
+        },
+        {
+          "uri": "https://anisearch.com/anime/5194"
+        },
+        {
+          "uri": "https://kitsu.app/anime/2707",
+          "relation": "summary"
+        },
+        {
+          "uri": "https://livechart.me/anime/3808"
+        },
+        {
+          "uri": "https://myanimelist.net/anime/2994",
+          "relation": "Summary"
+        },
+        {
+          "uri": "https://simkl.com/anime/36687"
+        },
+        {
+          "uri": "https://simkl.com/anime/40690"
+        }
       ],
       "tags": [
         "achronological order",
diff --git a/lib/src/test/resources/readme/DefaultReadmeCreatorTest/reviewed-isolated-entries.md b/lib/src/test/resources/readme/DefaultReadmeCreatorTest/reviewed-isolated-entries.md
index 218af01c..9d816716 100644
--- a/lib/src/test/resources/readme/DefaultReadmeCreatorTest/reviewed-isolated-entries.md
+++ b/lib/src/test/resources/readme/DefaultReadmeCreatorTest/reviewed-isolated-entries.md
@@ -83,9 +83,16 @@ Here is a description of the types in the JSON files.
 | `synonyms`     | `String[]`                                        | no       | Alternative titles and spellings under which the anime is also known. Duplicate free (case-sensitive). Doesn't contain the `title` |
 | `studios`      | `String[]`                                        | no       | Lower case studio names. In general a duplicate free list, but might contain duplicates for different writings.                    |
 | `producers`    | `String[]`                                        | no       | Lower case producers names. Companies only. In general a duplicate free list, but might contain duplicates for different writings. |
-| `relatedAnime` | `URL[]`                                           | no       | URLs to the metadata providers for anime that are somehow related to this anime.                                                   |
+| `relatedAnime` | [RelatedAnime[]](#relatedanime)                   | no       | Anime on the metadata providers which are related to this anime, including the kind of relation if the provider names it.         |
 | `tags`         | `String[]`                                        | no       | A non-curated list of tags and genres which describe the anime. All entries are lower case.                                        |
 
+### RelatedAnime
+
+| Field      | Type     | Nullable | Description                                                                                                                                       |
+|------------|----------|----------|---------------------------------------------------------------------------------------------------------------------------------------------------|
+| `uri`      | `URL`    | no       | URL to the related anime on the metadata provider.                                                                                                |
+| `relation` | `String` | yes      | Kind of relation exactly as the metadata provider labels it, e.g. `Sequel` (myanimelist), `SEQUEL` (anilist), `sequel` (kitsu). Not unified. Missing if the provider doesn't name it. |
+
 ### AnimeSeason
 
 | Field    | Type                                                | Nullable | Description                                 |
@@ -215,21 +222,56 @@ Here are some examples showing what the files look like.
         "vap"
       ],
       "relatedAnime": [
-        "https://anidb.net/anime/8146",
-        "https://anidb.net/anime/8147",
-        "https://anilist.co/anime/20931",
-        "https://anilist.co/anime/2994",
-        "https://anime-planet.com/anime/death-note-rewrite-1-visions-of-a-god",
-        "https://anime-planet.com/anime/death-note-rewrite-2-ls-successors",
-        "https://animecountdown.com/36687",
-        "https://animecountdown.com/40690",
-        "https://anisearch.com/anime/4441",
-        "https://anisearch.com/anime/5194",
-        "https://kitsu.app/anime/2707",
-        "https://livechart.me/anime/3808",
-        "https://myanimelist.net/anime/2994",
-        "https://simkl.com/anime/36687",
-        "https://simkl.com/anime/40690"
+        {
+          "uri": "https://anidb.net/anime/8146",
+          "relation": "Summary"
+        },
+        {
+          "uri": "https://anidb.net/anime/8147",
+          "relation": "Summary"
+        },
+        {
+          "uri": "https://anilist.co/anime/20931"
+        },
+        {
+          "uri": "https://anilist.co/anime/2994",
+          "relation": "SUMMARY"
+        },
+        {
+          "uri": "https://anime-planet.com/anime/death-note-rewrite-1-visions-of-a-god"
+        },
+        {
+          "uri": "https://anime-planet.com/anime/death-note-rewrite-2-ls-successors"
+        },
+        {
+          "uri": "https://animecountdown.com/36687"
+        },
+        {
+          "uri": "https://animecountdown.com/40690"
+        },
+        {
+          "uri": "https://anisearch.com/anime/4441"
+        },
+        {
+          "uri": "https://anisearch.com/anime/5194"
+        },
+        {
+          "uri": "https://kitsu.app/anime/2707",
+          "relation": "summary"
+        },
+        {
+          "uri": "https://livechart.me/anime/3808"
+        },
+        {
+          "uri": "https://myanimelist.net/anime/2994",
+          "relation": "Summary"
+        },
+        {
+          "uri": "https://simkl.com/anime/36687"
+        },
+        {
+          "uri": "https://simkl.com/anime/40690"
+        }
       ],
       "tags": [
         "achronological order",
diff --git a/lib/src/test/resources/readme/DefaultReadmeCreatorTest/zero-based-week.md b/lib/src/test/resources/readme/DefaultReadmeCreatorTest/zero-based-week.md
index 2921785a..f054cf3d 100644
--- a/lib/src/test/resources/readme/DefaultReadmeCreatorTest/zero-based-week.md
+++ b/lib/src/test/resources/readme/DefaultReadmeCreatorTest/zero-based-week.md
@@ -83,9 +83,16 @@ Here is a description of the types in the JSON files.
 | `synonyms`     | `String[]`                                        | no       | Alternative titles and spellings under which the anime is also known. Duplicate free (case-sensitive). Doesn't contain the `title` |
 | `studios`      | `String[]`                                        | no       | Lower case studio names. In general a duplicate free list, but might contain duplicates for different writings.                    |
 | `producers`    | `String[]`                                        | no       | Lower case producers names. Companies only. In general a duplicate free list, but might contain duplicates for different writings. |
-| `relatedAnime` | `URL[]`                                           | no       | URLs to the metadata providers for anime that are somehow related to this anime.                                                   |
+| `relatedAnime` | [RelatedAnime[]](#relatedanime)                   | no       | Anime on the metadata providers which are related to this anime, including the kind of relation if the provider names it.         |
 | `tags`         | `String[]`                                        | no       | A non-curated list of tags and genres which describe the anime. All entries are lower case.                                        |
 
+### RelatedAnime
+
+| Field      | Type     | Nullable | Description                                                                                                                                       |
+|------------|----------|----------|---------------------------------------------------------------------------------------------------------------------------------------------------|
+| `uri`      | `URL`    | no       | URL to the related anime on the metadata provider.                                                                                                |
+| `relation` | `String` | yes      | Kind of relation exactly as the metadata provider labels it, e.g. `Sequel` (myanimelist), `SEQUEL` (anilist), `sequel` (kitsu). Not unified. Missing if the provider doesn't name it. |
+
 ### AnimeSeason
 
 | Field    | Type                                                | Nullable | Description                                 |
@@ -215,21 +222,56 @@ Here are some examples showing what the files look like.
         "vap"
       ],
       "relatedAnime": [
-        "https://anidb.net/anime/8146",
-        "https://anidb.net/anime/8147",
-        "https://anilist.co/anime/20931",
-        "https://anilist.co/anime/2994",
-        "https://anime-planet.com/anime/death-note-rewrite-1-visions-of-a-god",
-        "https://anime-planet.com/anime/death-note-rewrite-2-ls-successors",
-        "https://animecountdown.com/36687",
-        "https://animecountdown.com/40690",
-        "https://anisearch.com/anime/4441",
-        "https://anisearch.com/anime/5194",
-        "https://kitsu.app/anime/2707",
-        "https://livechart.me/anime/3808",
-        "https://myanimelist.net/anime/2994",
-        "https://simkl.com/anime/36687",
-        "https://simkl.com/anime/40690"
+        {
+          "uri": "https://anidb.net/anime/8146",
+          "relation": "Summary"
+        },
+        {
+          "uri": "https://anidb.net/anime/8147",
+          "relation": "Summary"
+        },
+        {
+          "uri": "https://anilist.co/anime/20931"
+        },
+        {
+          "uri": "https://anilist.co/anime/2994",
+          "relation": "SUMMARY"
+        },
+        {
+          "uri": "https://anime-planet.com/anime/death-note-rewrite-1-visions-of-a-god"
+        },
+        {
+          "uri": "https://anime-planet.com/anime/death-note-rewrite-2-ls-successors"
+        },
+        {
+          "uri": "https://animecountdown.com/36687"
+        },
+        {
+          "uri": "https://animecountdown.com/40690"
+        },
+        {
+          "uri": "https://anisearch.com/anime/4441"
+        },
+        {
+          "uri": "https://anisearch.com/anime/5194"
+        },
+        {
+          "uri": "https://kitsu.app/anime/2707",
+          "relation": "summary"
+        },
+        {
+          "uri": "https://livechart.me/anime/3808"
+        },
+        {
+          "uri": "https://myanimelist.net/anime/2994",
+          "relation": "Summary"
+        },
+        {
+          "uri": "https://simkl.com/anime/36687"
+        },
+        {
+          "uri": "https://simkl.com/anime/40690"
+        }
       ],
       "tags": [
         "achronological order",
diff --git a/livechart/src/main/kotlin/io/github/manamiproject/modb/livechart/LivechartAnimeConverter.kt b/livechart/src/main/kotlin/io/github/manamiproject/modb/livechart/LivechartAnimeConverter.kt
index d4a98e23..37ed9653 100644
--- a/livechart/src/main/kotlin/io/github/manamiproject/modb/livechart/LivechartAnimeConverter.kt
+++ b/livechart/src/main/kotlin/io/github/manamiproject/modb/livechart/LivechartAnimeConverter.kt
@@ -260,13 +260,14 @@ public class LivechartAnimeConverter(
             .toHashSet()
     }
 
-    private fun extractRelatedAnime(data: ExtractionResult): HashSet<URI> {
+    private fun extractRelatedAnime(data: ExtractionResult): HashSet<RelatedAnime> {
         return if (data.notFound("relatedAnime")) {
             hashSetOf()
         } else {
+            // livechart only shows the franchise without naming the kind of relation
             data.listNotNull<String>("relatedAnime")
                 .map { it.remove("/anime/") }
-                .map { metaDataProviderConfig.buildAnimeLink(it) }
+                .map { RelatedAnime(metaDataProviderConfig.buildAnimeLink(it)) }
                 .toHashSet()
         }
     }
diff --git a/livechart/src/test/kotlin/io/github/manamiproject/modb/livechart/LivechartAnimeConverterTest.kt b/livechart/src/test/kotlin/io/github/manamiproject/modb/livechart/LivechartAnimeConverterTest.kt
index b7527f4e..6ce0f6d2 100644
--- a/livechart/src/test/kotlin/io/github/manamiproject/modb/livechart/LivechartAnimeConverterTest.kt
+++ b/livechart/src/test/kotlin/io/github/manamiproject/modb/livechart/LivechartAnimeConverterTest.kt
@@ -1,5 +1,6 @@
 package io.github.manamiproject.modb.livechart
 
+import io.github.manamiproject.modb.core.anime.RelatedAnime
 import io.github.manamiproject.modb.core.anime.AnimeSeason.Season.*
 import io.github.manamiproject.modb.core.anime.AnimeStatus.*
 import io.github.manamiproject.modb.core.anime.AnimeType.*
@@ -1208,7 +1209,7 @@ internal class LivechartAnimeConverterTest {
 
                 // then
                 assertThat(result.relatedAnime).containsExactly(
-                    URI("https://livechart.me/anime/3808"),
+                    RelatedAnime(URI("https://livechart.me/anime/3808")),
                 )
             }
         }
@@ -1234,9 +1235,9 @@ internal class LivechartAnimeConverterTest {
 
                 // then
                 assertThat(result.relatedAnime).containsExactlyInAnyOrder(
-                    URI("https://livechart.me/anime/3367"),
-                    URI("https://livechart.me/anime/3369"),
-                    URI("https://livechart.me/anime/3368"),
+                    RelatedAnime(URI("https://livechart.me/anime/3367")),
+                    RelatedAnime(URI("https://livechart.me/anime/3369")),
+                    RelatedAnime(URI("https://livechart.me/anime/3368")),
                 )
             }
         }
@@ -1262,21 +1263,21 @@ internal class LivechartAnimeConverterTest {
 
                 // then
                 assertThat(result.relatedAnime).containsExactlyInAnyOrder(
-                    URI("https://livechart.me/anime/3662"),
-                    URI("https://livechart.me/anime/6221"),
-                    URI("https://livechart.me/anime/3767"),
-                    URI("https://livechart.me/anime/7353"),
-                    URI("https://livechart.me/anime/3782"),
-                    URI("https://livechart.me/anime/7133"),
-                    URI("https://livechart.me/anime/4823"),
-                    URI("https://livechart.me/anime/7289"),
-                    URI("https://livechart.me/anime/6604"),
-                    URI("https://livechart.me/anime/5530"),
-                    URI("https://livechart.me/anime/3984"),
-                    URI("https://livechart.me/anime/5793"),
-                    URI("https://livechart.me/anime/7156"),
-                    URI("https://livechart.me/anime/4054"),
-                    URI("https://livechart.me/anime/6022"),
+                    RelatedAnime(URI("https://livechart.me/anime/3662")),
+                    RelatedAnime(URI("https://livechart.me/anime/6221")),
+                    RelatedAnime(URI("https://livechart.me/anime/3767")),
+                    RelatedAnime(URI("https://livechart.me/anime/7353")),
+                    RelatedAnime(URI("https://livechart.me/anime/3782")),
+                    RelatedAnime(URI("https://livechart.me/anime/7133")),
+                    RelatedAnime(URI("https://livechart.me/anime/4823")),
+                    RelatedAnime(URI("https://livechart.me/anime/7289")),
+                    RelatedAnime(URI("https://livechart.me/anime/6604")),
+                    RelatedAnime(URI("https://livechart.me/anime/5530")),
+                    RelatedAnime(URI("https://livechart.me/anime/3984")),
+                    RelatedAnime(URI("https://livechart.me/anime/5793")),
+                    RelatedAnime(URI("https://livechart.me/anime/7156")),
+                    RelatedAnime(URI("https://livechart.me/anime/4054")),
+                    RelatedAnime(URI("https://livechart.me/anime/6022")),
                 )
             }
         }
diff --git a/myanimelist/src/main/kotlin/io/github/manamiproject/modb/myanimelist/MyanimelistAnimeConverter.kt b/myanimelist/src/main/kotlin/io/github/manamiproject/modb/myanimelist/MyanimelistAnimeConverter.kt
index 58ff1a52..ce2a1938 100644
--- a/myanimelist/src/main/kotlin/io/github/manamiproject/modb/myanimelist/MyanimelistAnimeConverter.kt
+++ b/myanimelist/src/main/kotlin/io/github/manamiproject/modb/myanimelist/MyanimelistAnimeConverter.kt
@@ -14,6 +14,8 @@ import io.github.manamiproject.modb.core.extensions.EMPTY
 import io.github.manamiproject.modb.core.extensions.remove
 import io.github.manamiproject.modb.core.extractor.DataExtractor
 import io.github.manamiproject.modb.core.extractor.ExtractionResult
+import io.github.manamiproject.modb.core.extractor.WRAP_TABLE_ROW
+import io.github.manamiproject.modb.core.extractor.extractLabelledLinks
 import io.github.manamiproject.modb.core.extractor.XmlDataExtractor
 import io.github.manamiproject.modb.core.logging.LoggerDelegate
 import kotlinx.coroutines.withContext
@@ -45,8 +47,8 @@ public class MyanimelistAnimeConverter(
             "premiered" to "//td[text()='Premiered']/following-sibling::*/text()",
             "aired" to "//td[text()='Aired']/following-sibling::*/text()",
             "picture" to "//div[contains(@class, 'status-block')]/div[@itemprop='image']/@content",
-            "relatedAnime" to "//table[contains(@class, 'entries-table')]//a/@href",
-            "relatedAnimeDetails" to "//div[contains(@class, 'anime-detail-related-entries')]//a/@href",
+            "relatedAnime" to "//table[contains(@class, 'entries-table')]//tr/html()",
+            "relatedAnimeDetails" to "//div[contains(@class, 'anime-detail-related-entries')]/html()",
             "synonyms" to "//h2[text()='Information']/following-sibling::*//tr[0]/td[1]",
             "score" to "//span[@itemprop='ratingValue']/span/text()",
             "studios" to "//td[text()='Studios']/following-sibling::td/a/text()",
@@ -158,28 +160,38 @@ public class MyanimelistAnimeConverter(
         return hashSetOf(metaDataProviderConfig.buildAnimeLink(id))
     }
 
-    private fun extractRelatedAnime(data: ExtractionResult): HashSet<URI> {
+    private suspend fun extractRelatedAnime(data: ExtractionResult): HashSet<RelatedAnime> {
+        // tiles: <div class="... anime-detail-related-entries"> ... <a href="..."> ... <div class="text">Sequel</div>
         val relatedAnimeDetails = if (data.notFound("relatedAnimeDetails")) {
-            hashSetOf()
+            emptyList()
         } else {
-            data.listNotNull<String>("relatedAnimeDetails")
-                .filter { it.trim().startsWith(metaDataProviderConfig.buildAnimeLink(EMPTY).toString()) }
-                .mapNotNull { """\d+""".toRegex().find(it)?.value }
-                .map { metaDataProviderConfig.buildAnimeLink(it) }
-                .toHashSet()
+            extractor.extractLabelledLinks(
+                snippets = data.listNotNull<String>("relatedAnimeDetails"),
+                labelSelector = "//div[@class='text']/text()",
+                linkSelector = "//a/@href",
+            )
         }
 
+        // table: <tr><td class="... fn-grey5 ...">Side Story</td><td><ul class="entries"><li><a href="...">
         val relatedAnime = if (data.notFound("relatedAnime")) {
-            hashSetOf()
+            emptyList()
         } else {
-            data.listNotNull<String>("relatedAnime")
-                .filter { it.trim().startsWith(metaDataProviderConfig.buildAnimeLink(EMPTY).toString()) }
-                .mapNotNull { """\d+""".toRegex().find(it)?.value }
-                .map { metaDataProviderConfig.buildAnimeLink(it) }
-                .toHashSet()
+            extractor.extractLabelledLinks(
+                snippets = data.listNotNull<String>("relatedAnime"),
+                labelSelector = "//td[contains(@class, 'fn-grey5')]/text()",
+                linkSelector = "//ul[contains(@class, 'entries')]//a/@href",
+                wrap = WRAP_TABLE_ROW,
+            )
         }
 
-        return relatedAnime.union(relatedAnimeDetails).toHashSet()
+        return relatedAnime.union(relatedAnimeDetails)
+            .flatMap { entry -> entry.links.map { it to entry.label } }
+            .filter { (link, _) -> link.trim().startsWith(metaDataProviderConfig.buildAnimeLink(EMPTY).toString()) }
+            .mapNotNull { (link, label) ->
+                val id = """\d+""".toRegex().find(link)?.value ?: return@mapNotNull null
+                RelatedAnime.of(metaDataProviderConfig.buildAnimeLink(id), label)
+            }
+            .toHashSet()
     }
 
     private fun extractStatus(data: ExtractionResult): AnimeStatus {
diff --git a/myanimelist/src/test/kotlin/io/github/manamiproject/modb/myanimelist/MyanimelistAnimeConverterTest.kt b/myanimelist/src/test/kotlin/io/github/manamiproject/modb/myanimelist/MyanimelistAnimeConverterTest.kt
index 4ef04ced..49733b96 100644
--- a/myanimelist/src/test/kotlin/io/github/manamiproject/modb/myanimelist/MyanimelistAnimeConverterTest.kt
+++ b/myanimelist/src/test/kotlin/io/github/manamiproject/modb/myanimelist/MyanimelistAnimeConverterTest.kt
@@ -1,5 +1,6 @@
 package io.github.manamiproject.modb.myanimelist
 
+import io.github.manamiproject.modb.core.anime.RelatedAnime
 import io.github.manamiproject.modb.core.anime.AnimeSeason.Season.*
 import io.github.manamiproject.modb.core.anime.AnimeStatus.*
 import io.github.manamiproject.modb.core.anime.AnimeType.*
@@ -839,11 +840,11 @@ internal class MyanimelistAnimeConverterTest {
 
                 // then
                 assertThat(result.relatedAnime).containsExactlyInAnyOrder(
-                    URI("https://myanimelist.net/anime/17819"),
-                    URI("https://myanimelist.net/anime/19671"),
-                    URI("https://myanimelist.net/anime/22265"),
-                    URI("https://myanimelist.net/anime/30415"),
-                    URI("https://myanimelist.net/anime/33845"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/17819"), "Other"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/19671"), "Side Story"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/22265"), "Sequel"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/30415"), "Prequel"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/33845"), "Alternative Version"),
                 )
             }
         }
@@ -867,7 +868,7 @@ internal class MyanimelistAnimeConverterTest {
 
                 // then
                 assertThat(result.relatedAnime).containsExactly(
-                    URI("https://myanimelist.net/anime/10165"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/10165"), "Sequel"),
                 )
             }
         }
@@ -891,23 +892,23 @@ internal class MyanimelistAnimeConverterTest {
 
                 // then
                 assertThat(result.relatedAnime).containsExactlyInAnyOrder(
-                    URI("https://myanimelist.net/anime/12685"),
-                    URI("https://myanimelist.net/anime/15197"),
-                    URI("https://myanimelist.net/anime/15199"),
-                    URI("https://myanimelist.net/anime/15201"),
-                    URI("https://myanimelist.net/anime/17277"),
-                    URI("https://myanimelist.net/anime/1953"),
-                    URI("https://myanimelist.net/anime/2124"),
-                    URI("https://myanimelist.net/anime/2904"),
-                    URI("https://myanimelist.net/anime/30711"),
-                    URI("https://myanimelist.net/anime/33155"),
-                    URI("https://myanimelist.net/anime/34438"),
-                    URI("https://myanimelist.net/anime/34439"),
-                    URI("https://myanimelist.net/anime/40334"),
-                    URI("https://myanimelist.net/anime/40836"),
-                    URI("https://myanimelist.net/anime/41075"),
-                    URI("https://myanimelist.net/anime/4596"),
-                    URI("https://myanimelist.net/anime/8888"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/12685"), "Spin-Off"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/15197"), "Alternative Setting"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/15199"), "Alternative Setting"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/15201"), "Alternative Setting"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/17277"), "Alternative Setting"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/1953"), "Side Story"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/2124"), "Summary"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/2904"), "Sequel"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/30711"), "Alternative Setting"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/33155"), "Side Story"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/34438"), "Alternative Version"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/34439"), "Alternative Version"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/40334"), "Side Story"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/40836"), "Side Story"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/41075"), "Side Story"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/4596"), "Summary"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/8888"), "Alternative Setting"),
                 )
             }
         }
diff --git a/serde/src/test/kotlin/io/github/manamiproject/modb/serde/TestingAssets.kt b/serde/src/test/kotlin/io/github/manamiproject/modb/serde/TestingAssets.kt
index 2a3e1155..547b18fa 100644
--- a/serde/src/test/kotlin/io/github/manamiproject/modb/serde/TestingAssets.kt
+++ b/serde/src/test/kotlin/io/github/manamiproject/modb/serde/TestingAssets.kt
@@ -117,7 +117,7 @@ internal object TestAnimeRawObjects {
                     "vap",
                 ),
                 _relatedAnime = hashSetOf(
-                    URI("https://myanimelist.net/anime/2994"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/2994")),
                 ),
                 _tags = hashSetOf(
                     "psychological",
@@ -175,7 +175,9 @@ internal object TestAnimeRawObjects {
                 "vap"
               ],
               "relatedAnime": [
-                "https://myanimelist.net/anime/2994"
+                {
+                  "uri": "https://myanimelist.net/anime/2994"
+                }
               ],
               "tags": [
                 "psychological",
@@ -187,7 +189,7 @@ internal object TestAnimeRawObjects {
         """.trimIndent()
 
         val serializedMinified = """
-            {"sources":["https://myanimelist.net/anime/1535"],"title":"Death Note","type":"TV","episodes":37,"status":"FINISHED","animeSeason":{"season":"FALL"},"picture":"https://cdn.myanimelist.net/images/anime/1079/138100.jpg","thumbnail":"https://cdn.myanimelist.net/images/anime/1079/138100t.jpg","scores":[{"hostname":"myanimelist.net","value":8.62,"range":{"minInclusive":1.0,"maxInclusive":10.0}}],"synonyms":["DN","デスノート"],"studios":["madhouse"],"producers":["d.n. dream partners","nippon television network","shueisha","vap"],"relatedAnime":["https://myanimelist.net/anime/2994"],"tags":["psychological","shounen","supernatural","suspense"]}
+            {"sources":["https://myanimelist.net/anime/1535"],"title":"Death Note","type":"TV","episodes":37,"status":"FINISHED","animeSeason":{"season":"FALL"},"picture":"https://cdn.myanimelist.net/images/anime/1079/138100.jpg","thumbnail":"https://cdn.myanimelist.net/images/anime/1079/138100t.jpg","scores":[{"hostname":"myanimelist.net","value":8.62,"range":{"minInclusive":1.0,"maxInclusive":10.0}}],"synonyms":["DN","デスノート"],"studios":["madhouse"],"producers":["d.n. dream partners","nippon television network","shueisha","vap"],"relatedAnime":[{"uri":"https://myanimelist.net/anime/2994"}],"tags":["psychological","shounen","supernatural","suspense"]}
         """.trimIndent()
     }
 
@@ -228,7 +230,7 @@ internal object TestAnimeRawObjects {
                     "pony canyon",
                 ),
                 _relatedAnime = hashSetOf(
-                    URI("https://anilist.co/anime/131520"),
+                    RelatedAnime(URI("https://anilist.co/anime/131520")),
                 ),
                 _tags = hashSetOf(
                     "comedy",
@@ -297,7 +299,9 @@ internal object TestAnimeRawObjects {
                 "pony canyon"
               ],
               "relatedAnime": [
-                "https://anilist.co/anime/131520"
+                {
+                  "uri": "https://anilist.co/anime/131520"
+                }
               ],
               "tags": [
                 "comedy",
@@ -318,7 +322,7 @@ internal object TestAnimeRawObjects {
         """.trimIndent()
 
         val serializedMinified = """
-            {"sources":["https://anilist.co/anime/177191"],"title":"Go-toubun no Hanayome *","type":"SPECIAL","episodes":2,"status":"FINISHED","animeSeason":{"season":"FALL","year":2024},"picture":"https://s4.anilist.co/file/anilistcdn/media/anime/cover/medium/bx177191-ovNZsq8EbIPY.jpg","thumbnail":"https://s4.anilist.co/file/anilistcdn/media/anime/cover/medium/bx177191-ovNZsq8EbIPY.jpg","duration":{"value":1440,"unit":"SECONDS"},"scores":[{"hostname":"anilist.co","value":75.0,"range":{"minInclusive":1.0,"maxInclusive":100.0}}],"synonyms":["The Quintessential Quintuplets*","五等分の花嫁*"],"studios":["bibury animation studios"],"producers":["dax production","nichion","pony canyon"],"relatedAnime":["https://anilist.co/anime/131520"],"tags":["comedy","drama","ensemble cast","female harem","heterosexual","language barrier","male protagonist","marriage","primarily female cast","romance","school","shounen","twins"]}
+            {"sources":["https://anilist.co/anime/177191"],"title":"Go-toubun no Hanayome *","type":"SPECIAL","episodes":2,"status":"FINISHED","animeSeason":{"season":"FALL","year":2024},"picture":"https://s4.anilist.co/file/anilistcdn/media/anime/cover/medium/bx177191-ovNZsq8EbIPY.jpg","thumbnail":"https://s4.anilist.co/file/anilistcdn/media/anime/cover/medium/bx177191-ovNZsq8EbIPY.jpg","duration":{"value":1440,"unit":"SECONDS"},"scores":[{"hostname":"anilist.co","value":75.0,"range":{"minInclusive":1.0,"maxInclusive":100.0}}],"synonyms":["The Quintessential Quintuplets*","五等分の花嫁*"],"studios":["bibury animation studios"],"producers":["dax production","nichion","pony canyon"],"relatedAnime":[{"uri":"https://anilist.co/anime/131520"}],"tags":["comedy","drama","ensemble cast","female harem","heterosexual","language barrier","male protagonist","marriage","primarily female cast","romance","school","shounen","twins"]}
         """.trimIndent()
     }
 
@@ -377,18 +381,18 @@ internal object TestAnimeRawObjects {
                     "pony canyon",
                 ),
                 _relatedAnime = hashSetOf(
-                    URI("https://anidb.net/anime/16165"),
-                    URI("https://anilist.co/anime/131520"),
-                    URI("https://anime-planet.com/anime/the-quintessential-quintuplets-movie"),
-                    URI("https://animecountdown.com/1577789"),
-                    URI("https://anisearch.com/anime/16091"),
-                    URI("https://kitsu.app/anime/44229"),
-                    URI("https://livechart.me/anime/10488"),
-                    URI("https://livechart.me/anime/11921"),
-                    URI("https://livechart.me/anime/3448"),
-                    URI("https://livechart.me/anime/9428"),
-                    URI("https://myanimelist.net/anime/48548"),
-                    URI("https://simkl.com/anime/1577789"),
+                    RelatedAnime(URI("https://anidb.net/anime/16165")),
+                    RelatedAnime(URI("https://anilist.co/anime/131520")),
+                    RelatedAnime(URI("https://anime-planet.com/anime/the-quintessential-quintuplets-movie")),
+                    RelatedAnime(URI("https://animecountdown.com/1577789")),
+                    RelatedAnime(URI("https://anisearch.com/anime/16091")),
+                    RelatedAnime(URI("https://kitsu.app/anime/44229")),
+                    RelatedAnime(URI("https://livechart.me/anime/10488")),
+                    RelatedAnime(URI("https://livechart.me/anime/11921")),
+                    RelatedAnime(URI("https://livechart.me/anime/3448")),
+                    RelatedAnime(URI("https://livechart.me/anime/9428")),
+                    RelatedAnime(URI("https://myanimelist.net/anime/48548")),
+                    RelatedAnime(URI("https://simkl.com/anime/1577789")),
                 ),
                 _tags = hashSetOf(
                     "america",
@@ -576,18 +580,42 @@ internal object TestAnimeRawObjects {
                 "pony canyon"
               ],
               "relatedAnime": [
-                "https://anidb.net/anime/16165",
-                "https://anilist.co/anime/131520",
-                "https://anime-planet.com/anime/the-quintessential-quintuplets-movie",
-                "https://animecountdown.com/1577789",
-                "https://anisearch.com/anime/16091",
-                "https://kitsu.app/anime/44229",
-                "https://livechart.me/anime/10488",
-                "https://livechart.me/anime/11921",
-                "https://livechart.me/anime/3448",
-                "https://livechart.me/anime/9428",
-                "https://myanimelist.net/anime/48548",
-                "https://simkl.com/anime/1577789"
+                {
+                  "uri": "https://anidb.net/anime/16165"
+                },
+                {
+                  "uri": "https://anilist.co/anime/131520"
+                },
+                {
+                  "uri": "https://anime-planet.com/anime/the-quintessential-quintuplets-movie"
+                },
+                {
+                  "uri": "https://animecountdown.com/1577789"
+                },
+                {
+                  "uri": "https://anisearch.com/anime/16091"
+                },
+                {
+                  "uri": "https://kitsu.app/anime/44229"
+                },
+                {
+                  "uri": "https://livechart.me/anime/10488"
+                },
+                {
+                  "uri": "https://livechart.me/anime/11921"
+                },
+                {
+                  "uri": "https://livechart.me/anime/3448"
+                },
+                {
+                  "uri": "https://livechart.me/anime/9428"
+                },
+                {
+                  "uri": "https://myanimelist.net/anime/48548"
+                },
+                {
+                  "uri": "https://simkl.com/anime/1577789"
+                }
               ],
               "tags": [
                 "america",
@@ -618,7 +646,7 @@ internal object TestAnimeRawObjects {
         """.trimIndent()
 
         val serializedMinified = """
-            {"sources":["https://anidb.net/anime/18603","https://anilist.co/anime/177191","https://anime-planet.com/anime/the-quintessential-quintuplets-specials-2","https://anisearch.com/anime/19242","https://kitsu.app/anime/48807","https://livechart.me/anime/12646","https://myanimelist.net/anime/58755","https://simkl.com/anime/2448488"],"title":"5-toubun no Hanayome*","type":"SPECIAL","episodes":2,"status":"FINISHED","animeSeason":{"season":"FALL","year":2024},"picture":"https://cdn.myanimelist.net/images/anime/1915/145336.jpg","thumbnail":"https://cdn.myanimelist.net/images/anime/1915/145336t.jpg","duration":{"value":1440,"unit":"SECONDS"},"scores":[{"hostname":"anidb.net","value":6.63,"range":{"minInclusive":1,"maxInclusive":10}},{"hostname":"anilist.co","value":75,"range":{"minInclusive":1,"maxInclusive":100}},{"hostname":"anime-planet.com","value":3.845,"range":{"minInclusive":0.5,"maxInclusive":5.0}},{"hostname":"anisearch.com","value":3.9,"range":{"minInclusive":0.1,"maxInclusive":5}},{"hostname":"kitsu.app","value":76.95,"range":{"minInclusive":1,"maxInclusive":100}},{"hostname":"livechart.me","value":8.35,"range":{"minInclusive":1,"maxInclusive":10}},{"hostname":"myanimelist.net","value":8.62,"range":{"minInclusive":1,"maxInclusive":10}},{"hostname":"simkl.com","value":7.9,"range":{"minInclusive":1,"maxInclusive":10}}],"synonyms":["5-toubun no Hanayome *","Go-Toubun no Hanayome *","Go-Tōbun no Hanayome *","Go-toubun no Hanayome *","The Quintessential Quintuplets *","The Quintessential Quintuplets Movie*","The Quintessential Quintuplets Special 2","The Quintessential Quintuplets Specials 2","The Quintessential Quintuplets*","The Quintessential Quintuplets: Honeymoon Arc","五等分の花嫁*","五等分の花嫁＊","五等分的新娘＊"],"studios":["bibury animation studios"],"producers":["dax production","nichion","pony canyon"],"relatedAnime":["https://anidb.net/anime/16165","https://anilist.co/anime/131520","https://anime-planet.com/anime/the-quintessential-quintuplets-movie","https://animecountdown.com/1577789","https://anisearch.com/anime/16091","https://kitsu.app/anime/44229","https://livechart.me/anime/10488","https://livechart.me/anime/11921","https://livechart.me/anime/3448","https://livechart.me/anime/9428","https://myanimelist.net/anime/48548","https://simkl.com/anime/1577789"],"tags":["america","based on a manga","comedy","drama","ensemble cast","female harem","harem","heterosexual","japanese production","language barrier","male protagonist","marriage","new","predominantly female cast","present","primarily female cast","romance","school","sequel","shounen","siblings","time","twins"]}
+            {"sources":["https://anidb.net/anime/18603","https://anilist.co/anime/177191","https://anime-planet.com/anime/the-quintessential-quintuplets-specials-2","https://anisearch.com/anime/19242","https://kitsu.app/anime/48807","https://livechart.me/anime/12646","https://myanimelist.net/anime/58755","https://simkl.com/anime/2448488"],"title":"5-toubun no Hanayome*","type":"SPECIAL","episodes":2,"status":"FINISHED","animeSeason":{"season":"FALL","year":2024},"picture":"https://cdn.myanimelist.net/images/anime/1915/145336.jpg","thumbnail":"https://cdn.myanimelist.net/images/anime/1915/145336t.jpg","duration":{"value":1440,"unit":"SECONDS"},"scores":[{"hostname":"anidb.net","value":6.63,"range":{"minInclusive":1,"maxInclusive":10}},{"hostname":"anilist.co","value":75,"range":{"minInclusive":1,"maxInclusive":100}},{"hostname":"anime-planet.com","value":3.845,"range":{"minInclusive":0.5,"maxInclusive":5.0}},{"hostname":"anisearch.com","value":3.9,"range":{"minInclusive":0.1,"maxInclusive":5}},{"hostname":"kitsu.app","value":76.95,"range":{"minInclusive":1,"maxInclusive":100}},{"hostname":"livechart.me","value":8.35,"range":{"minInclusive":1,"maxInclusive":10}},{"hostname":"myanimelist.net","value":8.62,"range":{"minInclusive":1,"maxInclusive":10}},{"hostname":"simkl.com","value":7.9,"range":{"minInclusive":1,"maxInclusive":10}}],"synonyms":["5-toubun no Hanayome *","Go-Toubun no Hanayome *","Go-Tōbun no Hanayome *","Go-toubun no Hanayome *","The Quintessential Quintuplets *","The Quintessential Quintuplets Movie*","The Quintessential Quintuplets Special 2","The Quintessential Quintuplets Specials 2","The Quintessential Quintuplets*","The Quintessential Quintuplets: Honeymoon Arc","五等分の花嫁*","五等分の花嫁＊","五等分的新娘＊"],"studios":["bibury animation studios"],"producers":["dax production","nichion","pony canyon"],"relatedAnime":[{"uri":"https://anidb.net/anime/16165"},{"uri":"https://anilist.co/anime/131520"},{"uri":"https://anime-planet.com/anime/the-quintessential-quintuplets-movie"},{"uri":"https://animecountdown.com/1577789"},{"uri":"https://anisearch.com/anime/16091"},{"uri":"https://kitsu.app/anime/44229"},{"uri":"https://livechart.me/anime/10488"},{"uri":"https://livechart.me/anime/11921"},{"uri":"https://livechart.me/anime/3448"},{"uri":"https://livechart.me/anime/9428"},{"uri":"https://myanimelist.net/anime/48548"},{"uri":"https://simkl.com/anime/1577789"}],"tags":["america","based on a manga","comedy","drama","ensemble cast","female harem","harem","heterosexual","japanese production","language barrier","male protagonist","marriage","new","predominantly female cast","present","primarily female cast","romance","school","sequel","shounen","siblings","time","twins"]}
         """.trimIndent()
     }
 }
@@ -698,7 +726,7 @@ internal object TestAnimeObjects {
                     "vap",
                 ),
                 relatedAnime = hashSetOf(
-                    URI("https://myanimelist.net/anime/2994"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/2994")),
                 ),
                 tags = hashSetOf(
                     "psychological",
@@ -739,7 +767,9 @@ internal object TestAnimeObjects {
                 "vap"
               ],
               "relatedAnime": [
-                "https://myanimelist.net/anime/2994"
+                {
+                  "uri": "https://myanimelist.net/anime/2994"
+                }
               ],
               "tags": [
                 "psychological",
@@ -751,7 +781,7 @@ internal object TestAnimeObjects {
         """.trimIndent()
 
         val serializedMinified = """
-            {"sources":["https://myanimelist.net/anime/1535"],"title":"Death Note","type":"TV","episodes":37,"status":"FINISHED","animeSeason":{"season":"FALL"},"picture":"https://cdn.myanimelist.net/images/anime/1079/138100.jpg","thumbnail":"https://cdn.myanimelist.net/images/anime/1079/138100t.jpg","synonyms":["DN","デスノート"],"studios":["madhouse"],"producers":["D.N. Dream Partners","nippon television network","shueisha","vap"],"relatedAnime":["https://myanimelist.net/anime/2994"],"tags":["psychological","shounen","supernatural","suspense"]}
+            {"sources":["https://myanimelist.net/anime/1535"],"title":"Death Note","type":"TV","episodes":37,"status":"FINISHED","animeSeason":{"season":"FALL"},"picture":"https://cdn.myanimelist.net/images/anime/1079/138100.jpg","thumbnail":"https://cdn.myanimelist.net/images/anime/1079/138100t.jpg","synonyms":["DN","デスノート"],"studios":["madhouse"],"producers":["D.N. Dream Partners","nippon television network","shueisha","vap"],"relatedAnime":[{"uri":"https://myanimelist.net/anime/2994"}],"tags":["psychological","shounen","supernatural","suspense"]}
         """.trimIndent()
     }
 
@@ -797,7 +827,7 @@ internal object TestAnimeObjects {
                     "pony canyon",
                 ),
                 relatedAnime = hashSetOf(
-                    URI("https://myanimelist.net/anime/48548"),
+                    RelatedAnime(URI("https://myanimelist.net/anime/48548")),
                 ),
                 tags = hashSetOf(
                     "comedy",
@@ -845,7 +875,9 @@ internal object TestAnimeObjects {
                 "pony canyon"
               ],
               "relatedAnime": [
-                "https://myanimelist.net/anime/48548"
+                {
+                  "uri": "https://myanimelist.net/anime/48548"
+                }
               ],
               "tags": [
                 "comedy",
@@ -858,7 +890,7 @@ internal object TestAnimeObjects {
         """.trimIndent()
 
         val serializedMinified = """
-            {"sources":["https://myanimelist.net/anime/58755"],"title":"5-toubun no Hanayome*","type":"SPECIAL","episodes":2,"status":"FINISHED","animeSeason":{"season":"FALL","year":2024},"picture":"https://cdn.myanimelist.net/images/anime/1915/145336.jpg","thumbnail":"https://cdn.myanimelist.net/images/anime/1915/145336t.jpg","duration":{"value":1440,"unit":"SECONDS"},"score":{"arithmeticGeometricMean":7.44,"arithmeticMean":7.44,"median":7.44},"synonyms":["The Quintessential Quintuplets*","五等分の花嫁*"],"studios":["bibury animation studios"],"producers":["dax production","nichion","pony canyon"],"relatedAnime":["https://myanimelist.net/anime/48548"],"tags":["comedy","harem","romance","school","shounen"]}
+            {"sources":["https://myanimelist.net/anime/58755"],"title":"5-toubun no Hanayome*","type":"SPECIAL","episodes":2,"status":"FINISHED","animeSeason":{"season":"FALL","year":2024},"picture":"https://cdn.myanimelist.net/images/anime/1915/145336.jpg","thumbnail":"https://cdn.myanimelist.net/images/anime/1915/145336t.jpg","duration":{"value":1440,"unit":"SECONDS"},"score":{"arithmeticGeometricMean":7.44,"arithmeticMean":7.44,"median":7.44},"synonyms":["The Quintessential Quintuplets*","五等分の花嫁*"],"studios":["bibury animation studios"],"producers":["dax production","nichion","pony canyon"],"relatedAnime":[{"uri":"https://myanimelist.net/anime/48548"}],"tags":["comedy","harem","romance","school","shounen"]}
         """.trimIndent()
     }
 
@@ -923,18 +955,18 @@ internal object TestAnimeObjects {
                     "tbs",
                 ),
                 relatedAnime = hashSetOf(
-                    URI("https://anidb.net/anime/16165"),
-                    URI("https://anilist.co/anime/131520"),
-                    URI("https://anime-planet.com/anime/the-quintessential-quintuplets-movie"),
-                    URI("https://animecountdown.com/1577789"),
-                    URI("https://anisearch.com/anime/16091"),
-                    URI("https://kitsu.app/anime/44229"),
-                    URI("https://livechart.me/anime/10488"),
-                    URI("https://livechart.me/anime/11921"),
-                    URI("https://livechart.me/anime/3448"),
-                    URI("https://livechart.me/anime/9428"),
-                    URI("https://myanimelist.net/anime/48548"),
-                    URI("https://simkl.com/anime/1577789"),
+                    RelatedAnime(URI("https://anidb.net/anime/16165")),
+                    RelatedAnime(URI("https://anilist.co/anime/131520")),
+                    RelatedAnime(URI("https://anime-planet.com/anime/the-quintessential-quintuplets-movie")),
+                    RelatedAnime(URI("https://animecountdown.com/1577789")),
+                    RelatedAnime(URI("https://anisearch.com/anime/16091")),
+                    RelatedAnime(URI("https://kitsu.app/anime/44229")),
+                    RelatedAnime(URI("https://livechart.me/anime/10488")),
+                    RelatedAnime(URI("https://livechart.me/anime/11921")),
+                    RelatedAnime(URI("https://livechart.me/anime/3448")),
+                    RelatedAnime(URI("https://livechart.me/anime/9428")),
+                    RelatedAnime(URI("https://myanimelist.net/anime/48548")),
+                    RelatedAnime(URI("https://simkl.com/anime/1577789")),
                 ),
                 tags = hashSetOf(
                     "america",
@@ -1020,18 +1052,42 @@ internal object TestAnimeObjects {
                 "tbs"
               ],
               "relatedAnime": [
-                "https://anidb.net/anime/16165",
-                "https://anilist.co/anime/131520",
-                "https://anime-planet.com/anime/the-quintessential-quintuplets-movie",
-                "https://animecountdown.com/1577789",
-                "https://anisearch.com/anime/16091",
-                "https://kitsu.app/anime/44229",
-                "https://livechart.me/anime/10488",
-                "https://livechart.me/anime/11921",
-                "https://livechart.me/anime/3448",
-                "https://livechart.me/anime/9428",
-                "https://myanimelist.net/anime/48548",
-                "https://simkl.com/anime/1577789"
+                {
+                  "uri": "https://anidb.net/anime/16165"
+                },
+                {
+                  "uri": "https://anilist.co/anime/131520"
+                },
+                {
+                  "uri": "https://anime-planet.com/anime/the-quintessential-quintuplets-movie"
+                },
+                {
+                  "uri": "https://animecountdown.com/1577789"
+                },
+                {
+                  "uri": "https://anisearch.com/anime/16091"
+                },
+                {
+                  "uri": "https://kitsu.app/anime/44229"
+                },
+                {
+                  "uri": "https://livechart.me/anime/10488"
+                },
+                {
+                  "uri": "https://livechart.me/anime/11921"
+                },
+                {
+                  "uri": "https://livechart.me/anime/3448"
+                },
+                {
+                  "uri": "https://livechart.me/anime/9428"
+                },
+                {
+                  "uri": "https://myanimelist.net/anime/48548"
+                },
+                {
+                  "uri": "https://simkl.com/anime/1577789"
+                }
               ],
               "tags": [
                 "america",
@@ -1062,7 +1118,7 @@ internal object TestAnimeObjects {
         """.trimIndent()
 
         val serializedMinified = """
-            {"sources":["https://anidb.net/anime/18603","https://anilist.co/anime/177191","https://anime-planet.com/anime/the-quintessential-quintuplets-specials-2","https://anisearch.com/anime/19242","https://kitsu.app/anime/48807","https://livechart.me/anime/12646","https://myanimelist.net/anime/58755","https://simkl.com/anime/2448488"],"title":"5-toubun no Hanayome*","type":"SPECIAL","episodes":2,"status":"FINISHED","animeSeason":{"season":"FALL","year":2024},"picture":"https://cdn.myanimelist.net/images/anime/1915/145336.jpg","thumbnail":"https://cdn.myanimelist.net/images/anime/1915/145336t.jpg","duration":{"value":1440,"unit":"SECONDS"},"score":{"arithmeticGeometricMean":7.616175305477198,"arithmeticMean":7.624601113172541,"median":7.7272727272727275},"synonyms":["5-toubun no Hanayome *","Go-Toubun no Hanayome *","Go-Tōbun no Hanayome *","Go-toubun no Hanayome *","The Quintessential Quintuplets *","The Quintessential Quintuplets Movie*","The Quintessential Quintuplets Special 2","The Quintessential Quintuplets Specials 2","The Quintessential Quintuplets*","The Quintessential Quintuplets: Honeymoon Arc","五等分の花嫁*","五等分の花嫁＊","五等分的新娘＊"],"studios":["bibury animation studios"],"producers":["dax production","nichion","pony canyon","tbs"],"relatedAnime":["https://anidb.net/anime/16165","https://anilist.co/anime/131520","https://anime-planet.com/anime/the-quintessential-quintuplets-movie","https://animecountdown.com/1577789","https://anisearch.com/anime/16091","https://kitsu.app/anime/44229","https://livechart.me/anime/10488","https://livechart.me/anime/11921","https://livechart.me/anime/3448","https://livechart.me/anime/9428","https://myanimelist.net/anime/48548","https://simkl.com/anime/1577789"],"tags":["america","based on a manga","comedy","drama","ensemble cast","female harem","harem","heterosexual","japanese production","language barrier","male protagonist","marriage","new","predominantly female cast","present","primarily female cast","romance","school","sequel","shounen","siblings","time","twins"]}
+            {"sources":["https://anidb.net/anime/18603","https://anilist.co/anime/177191","https://anime-planet.com/anime/the-quintessential-quintuplets-specials-2","https://anisearch.com/anime/19242","https://kitsu.app/anime/48807","https://livechart.me/anime/12646","https://myanimelist.net/anime/58755","https://simkl.com/anime/2448488"],"title":"5-toubun no Hanayome*","type":"SPECIAL","episodes":2,"status":"FINISHED","animeSeason":{"season":"FALL","year":2024},"picture":"https://cdn.myanimelist.net/images/anime/1915/145336.jpg","thumbnail":"https://cdn.myanimelist.net/images/anime/1915/145336t.jpg","duration":{"value":1440,"unit":"SECONDS"},"score":{"arithmeticGeometricMean":7.616175305477198,"arithmeticMean":7.624601113172541,"median":7.7272727272727275},"synonyms":["5-toubun no Hanayome *","Go-Toubun no Hanayome *","Go-Tōbun no Hanayome *","Go-toubun no Hanayome *","The Quintessential Quintuplets *","The Quintessential Quintuplets Movie*","The Quintessential Quintuplets Special 2","The Quintessential Quintuplets Specials 2","The Quintessential Quintuplets*","The Quintessential Quintuplets: Honeymoon Arc","五等分の花嫁*","五等分の花嫁＊","五等分的新娘＊"],"studios":["bibury animation studios"],"producers":["dax production","nichion","pony canyon","tbs"],"relatedAnime":[{"uri":"https://anidb.net/anime/16165"},{"uri":"https://anilist.co/anime/131520"},{"uri":"https://anime-planet.com/anime/the-quintessential-quintuplets-movie"},{"uri":"https://animecountdown.com/1577789"},{"uri":"https://anisearch.com/anime/16091"},{"uri":"https://kitsu.app/anime/44229"},{"uri":"https://livechart.me/anime/10488"},{"uri":"https://livechart.me/anime/11921"},{"uri":"https://livechart.me/anime/3448"},{"uri":"https://livechart.me/anime/9428"},{"uri":"https://myanimelist.net/anime/48548"},{"uri":"https://simkl.com/anime/1577789"}],"tags":["america","based on a manga","comedy","drama","ensemble cast","female harem","harem","heterosexual","japanese production","language barrier","male protagonist","marriage","new","predominantly female cast","present","primarily female cast","romance","school","sequel","shounen","siblings","time","twins"]}
         """.trimIndent()
     }
 }
\ No newline at end of file
diff --git a/simkl/src/main/kotlin/io/github/manamiproject/modb/simkl/SimklAnimeConverter.kt b/simkl/src/main/kotlin/io/github/manamiproject/modb/simkl/SimklAnimeConverter.kt
index d5d766ce..472daea6 100644
--- a/simkl/src/main/kotlin/io/github/manamiproject/modb/simkl/SimklAnimeConverter.kt
+++ b/simkl/src/main/kotlin/io/github/manamiproject/modb/simkl/SimklAnimeConverter.kt
@@ -10,6 +10,7 @@ import io.github.manamiproject.modb.core.extensions.neitherNullNorBlank
 import io.github.manamiproject.modb.core.extensions.remove
 import io.github.manamiproject.modb.core.extractor.DataExtractor
 import io.github.manamiproject.modb.core.extractor.ExtractionResult
+import io.github.manamiproject.modb.core.extractor.extractLabelledLinks
 import io.github.manamiproject.modb.core.extractor.XmlDataExtractor
 import io.github.manamiproject.modb.core.anime.*
 import io.github.manamiproject.modb.core.anime.AnimeMedia.NO_PICTURE
@@ -57,7 +58,7 @@ public class SimklAnimeConverter(
                 "type" to "//strong[text()='Type:']/..//following-sibling::*/text()",
                 "duration" to "//meta[@property='og:duration']/@content",
                 "picture" to "//meta[@property='og:image']/@content",
-                "relatedAnime" to "//detail-related-item[@id='tvdetailrelations']//div[@class='tvdetailrelationsitems']//a/@href",
+                "relatedAnime" to "//detail-related-item[@id='tvdetailrelations']//div[@class='tvdetailrelationsitems']//a/html()",
                 "synonyms" to "//td[@itemprop='alternateName']/text()",
                 "score" to "//div[@itemprop='aggregateRating']//span[@class='SimklTVRatingAverage'][@itemprop='ratingValue']/text()",
                 "bestRating" to "//div[@itemprop='aggregateRating']//span[@itemprop='bestRating']/text()",
@@ -264,16 +265,19 @@ public class SimklAnimeConverter(
         return hashSetOf(metaDataProviderConfig.buildAnimeLink(animeId))
     }
 
-    private fun extractRelatedAnime(data: ExtractionResult): HashSet<URI> {
+    private suspend fun extractRelatedAnime(data: ExtractionResult): HashSet<RelatedAnime> {
         if (data.notFound("relatedAnime")) {
             return hashSetOf()
         }
 
-        val relatedAnimeIds = data.listNotNull<AnimeId>("relatedAnime") {
-            it.remove("/anime/").substringBefore('/')
-        }
-
-        return relatedAnimeIds.map { metaDataProviderConfig.buildAnimeLink(it) }.toHashSet()
+        // <a href="/anime/37429/..." class="tvdetailrelationsitem ..."> ... <div class="tvdetailrelationsitemimagetype">Alternative Setting</div>
+        return extractor.extractLabelledLinks(
+            snippets = data.listNotNull<String>("relatedAnime"),
+            labelSelector = "//div[@class='tvdetailrelationsitemimagetype']/text()",
+            linkSelector = "//a/@href",
+        ).flatMap { entry -> entry.links.map { it to entry.label } }
+            .map { (link, label) -> RelatedAnime.of(metaDataProviderConfig.buildAnimeLink(link.remove("/anime/").substringBefore('/')), label) }
+            .toHashSet()
     }
 
     private fun extractSynonyms(data: ExtractionResult): HashSet<String> {
diff --git a/simkl/src/test/kotlin/io/github/manamiproject/modb/simkl/SimklAnimeConverterTest.kt b/simkl/src/test/kotlin/io/github/manamiproject/modb/simkl/SimklAnimeConverterTest.kt
index dc41d65f..30b7949d 100644
--- a/simkl/src/test/kotlin/io/github/manamiproject/modb/simkl/SimklAnimeConverterTest.kt
+++ b/simkl/src/test/kotlin/io/github/manamiproject/modb/simkl/SimklAnimeConverterTest.kt
@@ -866,9 +866,9 @@ internal class SimklAnimeConverterTest {
 
                 // then
                 assertThat(result.relatedAnime).containsExactlyInAnyOrder(
-                    URI("https://simkl.com/anime/37429"),
-                    URI("https://simkl.com/anime/38317"),
-                    URI("https://simkl.com/anime/39885"),
+                    RelatedAnime(URI("https://simkl.com/anime/37429"), "Alternative Setting"),
+                    RelatedAnime(URI("https://simkl.com/anime/38317"), "Side story"),
+                    RelatedAnime(URI("https://simkl.com/anime/39885")),
                 )
             }
         }