Marriage Toxin
For centuries, the deadly arts have been perfected by Masters, and Five Great Families hold the greatest power and influence. Hikaru Gero, an heir to the Gero family, lives in the underworld as an elite assassin. When his sister is pressured to produce an heir, Hikaru asks Mei Kinosaki, a brilliant marriage swindler, to find him a bride. The most challenging mission of his life begins!
Seasons
1. The Poison Master's Search for a Bride
Air Date: 2026-04-07
An assassin must marry to appease his clan and save his sister. Small problem: He doesn't know how to date.
2. What Is "Charm," Anyway?
Air Date: 2026-04-14
Kinosaki takes Gero to practice dating in a floating art museum that becomes the scene of a heist.
3. My First
Air Date: 2026-04-21
Gero fights a Water Master to rescue Himekawa, but his real challenge is taking her on a date afterward.
4. The Sound Master
Air Date: 2026-04-28
Gero goes undercover as a student to guard a corporate heiress, but he isn't the only Master on campus.
5. Lord Chladni
Air Date: 2026-05-05
A test of courage seems like a romantic opportunity, but it turns out to be a deadly trap.
6. Together with Me
Air Date: 2026-05-12
Panicked students try to sacrifice Ureshino, and stopping Naruko is the only way to make them see reason.
7. The Bug Master's Wedding
Air Date: 2026-05-19
Gero goes to see his friend get married, only to run into some particularly unwelcome wedding crashers.
8. The Hitman Hunter
Air Date: 2026-05-26
Gero takes a job to protect a fellow Master from a man who can go toe-to-toe with the expert assassins.
9. The Animal Kingdom
Air Date: 2026-06-02
To save Arashiyama, Gero and friends storm into the Beast Clan's home ground.
10. Good-for-Nothing
Air Date: 2026-06-09
Gero and Arashiyama start to bond, but a run-in with their biggest enemy ruins the mood.
11. Offering
Air Date: 2026-06-16
Kinosaki and Piichi sneak into a Beast Clan lab and witness bizarre experiments with blood.
12. Heart and Soul
Air Date: 2026-06-23
To stand a chance against the Beast Master, Gero must get in touch with the essence of his Poison Blood.
13. Thanks, Man
Air Date: 2026-06-30
Arashiyama throws a party to thank Gero, and Kinosaki sets out to make sure it takes a romantic turn.
Select an episode to start watching
Rating
7.5/10
Release Date
2026-04-07
Episodes
13 (1 seasons)
Status
Returning Series
Cast
Haruki Ishiya
Hikaru Gero (voice)
Shion Wakayama
Mei Kinosaki (voice)
Anna Nagase
Kyoko Himekawa (voice)
Mariya Ise
Shizuku Ushio (voice)
Asaki Yuikawa
Shiori Ureshino (voice)
Soma Saito
Genya Naruko (voice)
Hinano Shirahama
Kimie Arashiyama (voice)
Shimba Tsuchiya
Piichi Nakagawa (voice)
Haruka Shiraishi
Akari Gero (voice)
Isamu Yusen
Toshiki Hanamaki (voice)
Videos
Production Companies
BONES Film
Bandai Namco Filmworks
BONES
Kansai Television
dentsu
Bandai Namco Music Live