diff --git a/internal/database/migrations/025_add_anime_relation_related_anime_index.sql b/internal/database/migrations/025_add_anime_relation_related_anime_index.sql
new file mode 100644
index 0000000..8685633
--- /dev/null
+++ b/internal/database/migrations/025_add_anime_relation_related_anime_index.sql
@@ -0,0 +1,6 @@
+-- +goose Up
+CREATE INDEX IF NOT EXISTS idx_anime_relation_related_anime_id
+ON anime_relation(related_anime_id);
+
+-- +goose Down
+DROP INDEX IF EXISTS idx_anime_relation_related_anime_id;