Marriage ToxinSeason 12026 · 13 episodesEpisodes1The 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.2What Is "Charm," Anyway?Kinosaki takes Gero to practice dating in a floating art museum that becomes the scene of a heist.3My FirstGero fights a Water Master to rescue Himekawa, but his real challenge is taking her on a date afterward.4The Sound MasterGero goes undercover as a student to guard a corporate heiress, but he isn't the only Master on campus.5Lord ChladniA test of courage seems like a romantic opportunity, but it turns out to be a deadly trap.6Together with MePanicked students try to sacrifice Ureshino, and stopping Naruko is the only way to make them see reason.7The Bug Master's WeddingGero goes to see his friend get married, only to run into some particularly unwelcome wedding crashers.8The Hitman HunterGero takes a job to protect a fellow Master from a man who can go toe-to-toe with the expert assassins.9The Animal KingdomTo save Arashiyama, Gero and friends storm into the Beast Clan's home ground.10Good-for-NothingGero and Arashiyama start to bond, but a run-in with their biggest enemy ruins the mood.11OfferingKinosaki and Piichi sneak into a Beast Clan lab and witness bizarre experiments with blood.12Heart and SoulTo stand a chance against the Beast Master, Gero must get in touch with the essence of his Poison Blood.13Thanks, ManArashiyama throws a party to thank Gero, and Kinosaki sets out to make sure it takes a romantic turn.
