My Happy Marriage Anime Special's Main Promo Video Reveals Opening Theme Song Posted on October 2, 2026 By admin No Comments on My Happy Marriage Anime Special's Main Promo Video Reveals Opening Theme Song Riria. performs opening theme song for 3-episode special on October 25 Source: https://www.animenewsnetwork.com/news/2026-10-01/my-happy-marriage-anime-special-main-promo-video-reveals-opening-theme-song/.242381 Anime