Marriagetoxin is an action comedy about an elite assassin who decides the toughest mission of his life is finding a wife. Based on a Shonen Jump+ manga, the anime aired in spring 2026 and has a second season on the way. Here is what to know.
What Is the Story About?
Hikaru Gero is the heir to the Poison Masters’ Gero family and has spent his life in the underworld, far from love or marriage. When his sister is pressured to produce an heir, he impulsively asks Mei Kinosaki, a brilliant marriage swindler who happens to be his latest target, to help him find a bride. Kinosaki agrees to coach him in dating, and the two take on what Shueisha calls the world’s toughest mission for love.
Main Characters and Cast
- Hikaru Gero, voiced by Haruki Ishiya (English: Ethan Gallardo).
- Mei Kinosaki, voiced by Shion Wakayama (English: Brittney Karbowski).
- Akari Gero, Hikaru’s sister, voiced by Haruka Shiraishi.
- Kyoko Himekawa and Shizuku Ushio, voiced by Anna Nagase and Mariya Ise.
Season 1: Release and Production
The anime premiered on April 7, 2026 on Kansai TV and Fuji TV’s Tuesday block, and Crunchyroll streamed it as it aired. It ran for 13 episodes through June 30 and covered the Water Master, Sound Master and Beast Master arcs. Bones Film produced it, with Motonobu Hori directing, Kimiko Ueno on scripts, and Kōhei Tokuoka as character designer and chief animation director. Taisei Iwasaki and Yuma Yamaguchi composed the music.
Season 2 Release Date
A second season was announced at the end of the finale and is scheduled for January 2027, streaming on Crunchyroll. The creators teased new characters, and a main visual features the bridge from episode 1. An exact day has not been announced in the coverage reviewed.
The Manga Behind It
The story is written by Jōmyaku and illustrated by Mizuki Yoda. It launched on the Shonen Jump+ app in April 2022, and Viz Media licensed it in English. If you want more romance anime, see our guide to The Dangers in My Heart.
Sources: Anime News Network, Anime Corner, Wikipedia, ANN (cast and staff).