The anime series MARRIAGETOXIN has revealed a brand-new main visual, its first trailer, and additional key staff, exciting fans ahead of its April 2026 TV premiere. The series, a thrilling blend of hitman action and marriage-swindling intrigue, is produced by BONES, the studio behind hits like My Hero Academia and GACHIAKUTA.
Official Trailer:
Main Visual:
ADDITIONAL CAST:
Kyoko Himekawa: Anna Nagase
Shizuku Ushio: Mariya Ise
Shiori Ureshino: Asaki Yuikawa
Genya Naruko: Soma Saito
Kimie Arashiyama: Hinano Shirahama
Piichi Nakagawa: Simba Tsuchiya
Akari Gero: Haruka Shiraishi
Toshiki Hanamaki: Isamu Yusen
CAST:
Hikaru Gero: Haruki Ishiya
Mei Kinosaki: Shion Wakayama
STAFF:
Director: Motonobu Hori
Series Composition & Script: Kimiko Ueno
Character Design & Chief Animation Director: Kohei Tokuoka
Sub Character Design: Yurika Sako
Costume Design: Kotono
Prop Design: Ayumi Nagaki, Ryo Hirata
Art Design: Toshiki Amata
Art: Bihou
Color Design: Hiroko Umezaki
Photography Director: Go Kanbayashi
3DCG: SANZIGEN Inc.
CG Animation Director: Taiki Nagashima
Editing: Kumiko Sakamoto
Sound Director: Haru Yamada
Sound Effects: Tomokazu Mii
Music: Taisei Iwasaki, yuma yamaguchi
Production Supervision: Bones
Animation Production: Bones Film
Production: MARRIAGETOXIN Project
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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