Marriagetoxin (Japanese: マリッジトキシン, Hepburn: Marijjitokishin, stylized as MARRIAGETOXIN) is a Japanese manga series written by Joumyaku and illustrated by Mizuki Yoda. It has been serialized on the mobile app and website of Shueisha’s online magazine Shōnen Jump+ since April 2022, with its chapters collected in 13 tankōbon volumes as of May 2025. Viz Media licensed the series for English release.