An official website opened today announced that a TV anime adaptation of action rom-com manga MARRIAGETOXIN is in production for a planned 2026 release. The below teaser trailer and visual were shared, along with main cast and staff details. Haruki Ishiya (Daiya in 86 EIGHTY-SIX ) leads the series as Hikaru Gero, an expert hitman specializing in poison, alongside Shion Wakayama (Momo in DAN DA DAN ) as Mei Kinosaki, a marriage swindler. MARRIAGETOXIN Teaser Trailer MARRIAGETOXIN Teaser Visual RELATED: Hanaori-san wa Tensei Shite mo Kenka ga Shitai Anime Adaptation Announced for 2026 Motonobu Hori ( Metallic Rouge ) directs the MARRIAGETOXIN anime at studio bones film, with series composition by Kimiko Ueno ( ZENSHU ), character designs and chief animation direction by Kohei Tokuoka ( The Fragrant Flower Blooms With Dignity ) and music by Taisei Iwasaki ( BELLE ) and yuma yamaguchi ( Link Click ). Viz Media publishes an official English version of Joumyaku and Mizuki Yoda's original manga, describing the story like so: As a deadly assassin from the poison clan, Gero swears he’ll never settle down—that is, until the family orders his sister to produce the poison clan’s next heir. Refusing to let his sister abandon her chance at true love with her girlfriend, Gero desperately turns to marriage swindler Mei Kinosaki for relationship advice. Can Kinosaki turn this trained killer into a charming husband-to-be? Source: MoCa News
