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Series

Marriage Toxin

2026★ 7.42 seasons

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!

AnimationAction & AdventureComedy
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Cast

Featured cast
Haruki IshiyaHikaru Gero (voice)
Shion WakayamaMei Kinosaki (voice)
Anna NagaseKyoko Himekawa (voice)
Mariya IseShizuku Ushio (voice)
Asaki YuikawaShiori Ureshino (voice)
Soma SaitoGenya Naruko (voice)

Episodes

1The Poison Master's Search for a BrideAn assassin must marry to appease his clan and save his sister. Small problem: He doesn't know how to date.24 min2What Is "Charm," Anyway?Kinosaki takes Gero to practice dating in a floating art museum that becomes the scene of a heist.24 min3My FirstGero fights a Water Master to rescue Himekawa, but his real challenge is taking her on a date afterward.24 min4The Sound MasterGero goes undercover as a student to guard a corporate heiress, but he isn't the only Master on campus.24 min5Lord ChladniA test of courage seems like a romantic opportunity, but it turns out to be a deadly trap.24 min6Together with MePanicked students try to sacrifice Ureshino, and stopping Naruko is the only way to make them see reason.24 min7The Bug Master's WeddingGero goes to see his friend get married, only to run into some particularly unwelcome wedding crashers.24 min8The Hitman HunterGero takes a job to protect a fellow Master from a man who can go toe-to-toe with the expert assassins.24 min9The Animal KingdomTo save Arashiyama, Gero and friends storm into the Beast Clan's home ground.24 min10Good-for-NothingGero and Arashiyama start to bond, but a run-in with their biggest enemy ruins the mood.24 min11OfferingKinosaki and Piichi sneak into a Beast Clan lab and witness bizarre experiments with blood.24 min12Heart and SoulTo stand a chance against the Beast Master, Gero must get in touch with the essence of his Poison Blood.24 min13Thanks, ManArashiyama throws a party to thank Gero, and Kinosaki sets out to make sure it takes a romantic turn.24 min

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