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MARRIAGETOXIN
Synopsis
The story
For centuries, the deadly arts have been perfected by those known as the Masters. Among them, the Poison Masters of the Five Great Families hold the most fearsome power and influence. Hikaru Gero, heir to the Poison Masters’ Gero Family, has lived his entire life in the underworld, far removed from love or marriage. But when the Gero Family head decrees that Hikaru’s sister must bear an heir to preserve the bloodline—by force if necessary—Hikaru resolves to protect her at all costs. It is then that Hikaru encounters Mei Kinosaki, a brilliant marriage swindler who becomes the target of his latest job. Realizing that the only way of solving the family succession problem and protecting his sister is through marriage, Hikaru impulsively asks Mei for help in finding a bride.
ActionComedyDramaRomance
Episode guide
13 episodes
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01Episode 1Unwatched · AiredAired Apr 7, 202602Episode 2Unwatched · AiredAired Apr 14, 202603Episode 3Unwatched · AiredAired Apr 21, 202604Episode 4Unwatched · AiredAired Apr 28, 202605Episode 5Unwatched · AiredAired May 5, 202606Episode 6Unwatched · AiredAired May 12, 202607Episode 7Unwatched · AiredAired May 19, 202608Episode 8Unwatched · AiredAired May 26, 202609Episode 9Unwatched · AiredAired Jun 2, 202610Episode 10Unwatched · AiredAired Jun 9, 202611Episode 11Unwatched · AiredAired Jun 16, 202612Episode 12Unwatched · AiredAired Jun 23, 202613Episode 13Unwatched · AiredAired Jun 30, 2026Characters & voices
500 credited
Narrator
Background
Hikaru Gero
Main
Mei Kinosaki
Main
Shiori Ureshino
Supporting
Kimie Arashiyama
Supporting
Kyouko Himekawa
Supporting
Piichi Nakagawa
Supporting
Shizuku Ushio
Supporting
Akari Gero
Supporting
Toshiki Hanamaki
Supporting
Toshiro Dogo
Supporting
Genya Naruko
Supporting
Tonako Dogo
Supporting
Teruaki Gero
Supporting
Marin Arimura
Supporting
Byakko
Supporting
Tomohisa Itabashi
Supporting
Yousuke Itabashi
Supporting
Production staff
500 credited
Tatsuya MinamiSystem Engineer
Zachary Charles BoltonADR Producer (English)
Hiroya IijimaKey Animation (ep 1)
Kumiko SakamotoEditing
Kimiko UenoSeries CompositionKimiko UenoScript (ep 1)
Taisei IwasakiMusic
Hideoki KusamaKey Animation (ep 6)Tomomi ShimazakiKey Animation (ep 1)Toshiki AmataArt Design
Haru YamadaSound Director
Kouhei TokuokaCharacter DesignKouhei TokuokaChief Animation Director (ep 1)
Mizuki YodaOriginal Character Design
Asuka HayashiKey Animation (ep 1)Azusa OkazakiIn-Between Animation (ep 1)
Saori HosodaKey Animation (ep 1)
Nobutaka MasudaKey Animation (ep 1)Chie NishioKey Animation (ep 1)Masaya SekizakiKey Animation (ep 1)Themes & motifs
AniList community tags
AssassinsTheme-Other-Organisations97%
MarriageTheme-Other94%
CrimeTheme-Other89%
Super PowerTheme-Fantasy86%
Primarily Adult CastCast-Main Cast85%
UrbanSetting-Scene84%
Surreal ComedyTheme-Comedy84%
BisexualCast-Traits78%
Urban FantasySetting-Universe75%
Male ProtagonistCast-Main Cast74%
LGBTQ+ ThemesTheme-Other68%
ShounenDemographic65%
HeterosexualTheme-Romance64%
Martial ArtsTheme-Action60%
EducationalTheme-Other60%
Anti-HeroCast-Main Cast56%
Community pulse
93.5K members
Score spread
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Watch status
Current24,273
Planning31,357
Completed32,129
Dropped3,577
Paused2,194
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What viewers say
3 community reviews