For centuries, the deadly arts have been perfected by Masters, and Five Great Families hold the greatest power and influence. Hikaru Gero, an heir to the Gero family, lives in the underworld as an elite assassin. When his sister is pressured to produce an heir, Hikaru asks Mei Kinosaki, a brilliant marriage swindler, to find him a bride. The most challenging mission of his life begins!

Marriage Toxin (2026)

★ 7.4/10 April 7, 2026 2 seasons

Action & AdventureAnimationComedy

For centuries, the deadly arts have been perfected by Masters, and Five Great Families hold the greatest power and influence. Hikaru Gero, an heir to the Gero family, lives in the underworld as an elite assassin. When his sister is pressured to produce an heir, Hikaru asks Mei Kinosaki, a brilliant marriage swindler, to find him a bride. The most challenging mission of his life begins!

Where to watch

Crunchyroll Crunchyroll Amazon Channel Amazon Video Apple TV Store Fandango At Home

Trailer

Cast

Haruki Ishiya Hikaru Gero (voice) Shion Wakayama Mei Kinosaki (voice) Anna Nagase Kyoko Himekawa (voice) Mariya Ise Shizuku Ushio (voice) Asaki Yuikawa Shiori Ureshino (voice) Soma Saito Genya Naruko (voice) Hinano Shirahama Kimie Arashiyama (voice) Shimba Tsuchiya Piichi Nakagawa (voice) Haruka Shiraishi Akari Gero (voice) Isamu Yusen Toshiki Hanamaki (voice)

User Reviews (1)

ivvnlly October 8, 2026

Good anime, i really enjoyed, even if i dont like the type of romance between 1 boy and various girls. The fights were incredible good, and honestly i fell for Gero at the end with his shy face. The characters are very cute and interesting, really liked the dynamic, it’s wasn’t too hard. I would recommend it, even just because it’s a very fighting anime.