Marriagetoxin Anime by Bones Film Announced
The Marriagetoxin manga is getting an anime adaptation by Bones Film in 2026. A teaser visual and trailer were revealed, along with the cast and staff information. The main cast will feature Haruki Ishiya as Hikaru Gero and Shion Wakayama as Mei Kinosaki.
The staff includes:
- Director: Motonobu Hori
- Series Composition and Script: Kimiko Ueno
- Character Designer and Chief Animation Director: Kohei Tokuoka
- Music: Taisei Iwasaki, yuma yamaguchi
- Production Supervision: Bones
The anime will adapt the Marriagetoxin manga written by Joumyaku and illustrated by Mizuki Yoda. The manga has been serialized on the Shonen Jump+ online platform since 2022. The manga is available on MANGA Plus, with VIZ Media handling the official English releases. The series currently has 14 volumes in Japan; Volume 15 is slated to release on October 15.
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!
Marriageroxin Anime Announcement: Staff Comments
Haruki Ishiya (Voice of Hikaru Gero)
“Hello, this is Haruki Ishiya, and I’ll be voicing Hikaru Gero in the upcoming MARRIAGETOXIN TV anime.
I’ve been a huge fan of this series, eagerly awaiting each weekly update on Shonen Jump+. So when I heard I’d been chosen to play the lead role, I was so thrilled that I literally jumped up and yelled, ‘Yes!!’ It’s an absolute honor to contribute to a story I love so much.
With its unique characters, rich worldbuilding, stunning artwork, and a blend of action and marriage-hunting chaos—seeing all of this brought to life through animation is something I’m personally very excited about. Please look forward to it!”
Shion Wakayama (Voice of Mei Kinosaki)
“Hello, I’m Shion Wakayama, and I’ll be playing Mei Kinosaki. I can’t even begin to describe how happy I am to be part of this series—it’s one I always look forward to reading. Mei may be a marriage swindler turned matchmaking advisor, but at heart, they’re always doing their best for Hikaru’s happiness. I’ll put everything I have into delivering their charm and determination with all the love it deserves. Please look forward to the MARRIAGETOXIN TV anime!”
Story: Joumyaku
“A huge shout-out to artist Mizuki Yoda, our editors, and all the readers who have supported us—thank you so much!!
I was able to be involved in the production just a little, but let me say this: Director Hori, character designer Tokuoka-san, series composer and scriptwriter Ueno-san, and the entire anime staff—their understanding of this work is on another level. Every meeting made the story even better; it was truly amazing to watch it evolve.
I also got to attend the voice recording for Episode 1, and with Haruki Ishiya as Hikaru, Shion Wakayama as Mei, and all the other incredible voice actors bringing their A-game, I became convinced: this anime will without a doubt be a masterpiece.
The release is still a little ways off, but until then, I’ll keep doing everything I can to make sure the original manga is as thrilling as possible. Please look forward to it!”
Art: Mizuki Yoda
“An anime adaptation—what a dream come true!
My heartfelt thanks go out to everyone who helped bring this manga to life, to all the readers who have supported it, and to the entire anime production team for their incredible efforts. Truly, thank you so much!
I’ve been inspired by anime openings ever since I was young, so the fact that MARRIAGETOXIN will now have its very own opening theme in the world makes me incredibly happy!
Together with the original manga, please look forward to the MARRIAGETOXIN TV anime!”
Director: Motonobu Hori
“I am honored to assist Hikaru Gero—the ‘Assassin’ himself—on his journey to find love.
Despite the difficulties of inheriting such a dangerous family business, Gero is a man with a sincere and upright heart. With the help of Mei Kinosaki, I believe he will overcome these obstacles and one day find a partner to share his future with.
We, the production staff, will be giving this project our absolute best, but I also hope all of you will continue to support and cheer on these characters as they move forward.
I may not be the most eloquent speaker, but please take this as a heartfelt message to send these young characters off on their journey.
Thank you very much.”
Character Designer & Chief Animation Director: Kohei Tokuoka
“Romance, action, comedy, handsome men, beautiful women, quirky characters… This story packs so many elements into a single work, making it an absolute joy to bring to life.
Every character is full of unique personality traits, which makes the creative process so much fun. Through this anime, I hope we can elevate the charm and appeal of this series even further for all the viewers to enjoy.”
Source: Press Release, Official Website
©Joumyaku・Mizuki Yoda/SHUEISHA, MARRIAGETOXIN Project
