Shueisha and BONES Film announced a TV anime adaptation of Joumyaku and Mizuki Yoda’s MARRIAGETOXIN manga series has been greenlit for 2026. A new promotional video, teaser visual, and new character images were revealed alongside the announcement of the MARRIAGETOXIN anime’s main cast and staff members.

Motonobu Hori is directing the MARRIAGETOXIN anime series. Kimiko Ueno is in charge of series composition and scripts, Kohei Tokuoka is the character designer and chief animation director, and Taisei Iwasaki and yuma yamaguchi are the music composers. BONES Animation is supervising the production by BONES Film and MARRIAGETOXIN Project. The main cast of the anime includes Haruki Ishiya as Hikaru Gero and Shion Wakayama as Mei Kinosaki.

MARRIAGETOXIN Anime Teaser Trailer

​Get the latest details below:

This high-stakes, marriage centered, battle action story follows Hikaru Gero, a young assassin and heir to the  centuries-old Poison Masters Clan. In order to preserve his family bloodline, Hikaru teams up with master marriage swindler, Mei Kinosaki, to pursue the ultimate marriage.​

Heir to the “Poison Master” Gero Family, one of the Five Great Families of “Masters,” Hikaru Gero (Voiced by Haruki Ishiya) is a top-tier assassin with no experience in romance and little ability to interact with women. His life in the underworld has left no room for such things. He reluctantly begins searching for a bride to carry on the family line. His hobby is collecting DIY candy kits. 

Mei Kinosaki (Voiced by Shion Wakayama) is an experienced marriage swindler who boasts that they can charm almost anyone, man or woman, in just 30 seconds. After meeting Hikaru by chance, they unexpectedly end up helping him in his quest for marriage. Despite their refined appearance, they have an enormous appetite and love delicious food.​ 

Lastly, the main cast, staff, Joumyaku, and Mizuki Yoda shared comments on the announcement of the anime:

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.”