The official website for the MARRIAGETOXIN (Marriage Toxin/ マリッジトキシン) TV anime has confirmed that the anime will premiere on April 7th, 2026.
Hori Motonobu is directing the anime at Bones Film studio, and the anime will star Ishiya Haruki as Hikaru Gero and Wakayama Shion as Mei Kinosaki.
[https://www.youtube.com/watch?v=qeOqcqHqyIY]
The anime is an adaptation of the MARRIAGETOXIN manga by Joumyaku and Yoda, which began in April 2022 in Shueisha’s Shonen Jump+ app. Shueisha published the manga’s first tankoubon volume in August 2022, and the manga’s 16th volume was released on January 5th, 2026.
The MANGA Plus app releases the manga chapters in English under the name MARRIAGETOXIN, and Viz Media releases the manga volumes in English under the name Marriage Toxin. Viz Media will release the manga’s 12th volume on April 7th, 2026.
Viz Media describes the manga below:
“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?”
