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Marriage Toxin

Gero may be a master assassin, but he’s not exactly killing it in the romance department!

Created by Joumyaku and Mizuki Yoda | MoreLess about Marriage Toxin

Poison Master Hikaru Gero is about to take on his most challenging assignment yet—getting married! But after training his entire life to become one of the world’s deadliest assassins, Gero couldn’t be more clueless when it comes to the art of dating. Thankfully, marriage swindler Mei Kinosaki knows everything there is to know about love, and together, this unlikely pair is going to do whatever it takes to get Gero hitched—even if they have to take on the entire criminal underworld in the process!

Joumyaku kicked off his career in 2021 when he wrote two one-shots, “Hyper Hard Special Mission” and “Reisougyou no Arai-kun” (Ghost Sweeper Arai-kun), published in back-to-back months of Jump+. The following year, Joumyaku partnered with Mizuki Yoda to release his first serialization, Marriage Toxin.

Mizuki Yoda first hit the manga scene with his one-shot “Jigoku no Sata mo Ryuu Shidai” (The State of Hell Depends on the Dragon), which was published in Shonen Jump NEXT! in 2015. In 2016, he and Tomohide Hirao teamed up to create the one-shot “Legacy,” which ran in Weekly Shonen Jump as part of the Gold Future Cup. His first series, Ne0;lation, was completed in 2019, and three years later he began working on his next series, Marriage Toxin, for Jump+.
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Series Debut!

Marriage Toxin, Vol. 1

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?

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