MARRIAGETOXIN, the marriage-themed battle action manga written by Joumyaku and illustrated by Mizuki Yoda, is officially getting a TV anime adaptation. The series is set to premiere in 2026. Alongside the announcement, a teaser visual, new character designs, and a teaser trailer have been unveiled.
Teaser Trailer:
Teaser Visual:
STAFF:
Original Work: STORY by Joumyaku, ART by Mizuki Yoda (Serialized in “Manga Plus by SHUEISHA”)
Director: Motonobu Hori
Series Composition & Script: Kimiko Ueno
Character Designer & Chief Animation Director: Kohei Tokuoka
Music: Taisei Iwasaki, yuma yamaguchi
Production Supervision: BONES
Animation Production: BONES Film
Production: MARRIAGETOXIN Project
CAST:
Hikaru Gero: Haruki Ishiya
Mei Kinosaki: Shion Wakayama
MARRIAGETOXIN, written by Joumyaku and illustrated by Mizuki Yoda, is serialized on Manga Plus by Shueisha. Volumes 1–14 are currently available, with Volume 15 set for release on October 3, 2025.
SERIES INTRODUCTION:
Hikaru Gero, the elite assassin and heir to the Poison Masters Clan, will be voiced by Haruki Ishiya. Mei Kinosaki, the skilled marriage swindler who aids Hikaru in his unexpected mission, will be voiced by Shion Wakayama.
For centuries, the Poison Masters have perfected the art of assassination. Among them, the Gero family stands as one of the five most powerful families of Masters, wielding unmatched skill and influence. Hikaru Gero, heir to this infamous bloodline, has lived his life deep in the shadows of the underworld, far removed from love or marriage. However, to ensure the Poison Master bloodline does not die out, the head of the Gero family declares that Hikaru’s sister will be forced to bear an heir. Soon after, Hikaru crosses paths with Mei Kinosaki, a brilliant marriage swindler who also happens to be his current assassination target.
Determined to protect his sister and solve the succession problem himself, Hikaru makes an unexpected request on the spot—asking Mei to help him get married.
“…That’s the first time anyone’s ever proposed like that.”
And so, with the cunning marriage swindler Mei as his advisor, the elite assassin Hikaru sets out on the toughest mission for love. His goal? The ultimate marriage.
The most unlikely duo—an assassin and a marriage swindler—take on the world’s toughest mission for love!
Source: Press Release
©Joumyaku・Mizuki Yoda/SHUEISHA, MARRIAGETOXIN Project
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