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Marriage Toxin anime just dropped on Crunchyroll with a star-studded cast. The action-romance series premiered April 7, 2026, bringing a lethal dose of poison mastery, marriage scheming, and high-stakes romance to Spring 2026. Here’s everything you need to know about this must-watch anime.
🔥 Quick Facts
- Premiere Date: April 7, 2026 on Crunchyroll
- Studio: Bones Film with series director Motonobu Hori
- Global Premiere Screening: Sakura-Con Seattle on April 4 with Haruki Ishiya attending
- Original Source: Manga by Joumyaku and Mizuki Yoda from Shonen Jump+
Here’s the Loaded Voice Cast Leading the Mission
Haruki Ishiya voices Hikaru Gero, the legendary poison master assassin navigating his deadliest assignment yet: finding a bride. Shion Wakayama (known for Momo in Dan Da Dan) voices Mei Kinosaki, the cunning marriage swindler who becomes Hikaru’s unexpected advisor.
The supporting cast is equally stacked with veteran voice actors bringing depth to the ensemble. Anna Nagase, famous for voicing Riko Amanai in Jujutsu Kaisen, plays Kyoko Himekawa. Mariya Ise, legendary for her role as Killua Zoldyck in Hunter x Hunter, voices Shizuku Ushio. Soma Saito (Moriarty the Patriot) brings intensity as Genya Naruko.
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What’s the Explosive Story Actually About
Hikaru Gero swore he’d never marry. As heir to the Poison Masters Gero Family, he perfected deadly toxins instead of relationships. But family politics shift brutally when the family head demands his sister produce an heir as the next bloodline keeper.
Desperate to protect his sister from an arranged marriage, Hikaru encounters marriage swindler Mei Kinosaki during what was supposed to be an assassination. Realizing marriage is his only escape route, Hikaru asks Mei the weirdest question of his life: teach him how to find a bride. What unfolds is the world’s toughest romantic mission for the ultimate duo of an elite assassin and a brilliant con artist.
Meet the Full Ensemble Bringing This Chaos to Life
| Character | Voice Actor | Known For |
| Hikaru Gero | Haruki Ishiya | 86 EIGHTY-SIX |
| Mei Kinosaki | Shion Wakayama | DAN DA DAN |
| Kyoko Himekawa | Anna Nagase | Jujutsu Kaisen |
| Shizuku Ushio | Mariya Ise | Hunter x Hunter |
| Genya Naruko | Soma Saito | Moriarty the Patriot |
‘To win love, you’ve got to play with poison. A high-stakes mission for the ultimate duo begins.’
— Official Crunchyroll Anime Description
The Technical Brilliance Behind the Scenes
Motonobu Hori (Metallic Rouge) directs this ambitious production at Bones Film, working with series composition by Kimiko Ueno (Astro Note) and eye-catching character designs by Kohei Tokuoka (The Fragrant Flower Blooms With Dignity). The music features talented composers Taisei Iwasaki (BELLE) and Yuma Yamaguchi (Link Click).
The opening theme “Kill or Kiss” is performed by Yurina Hirate, the actress and singer known for her dynamic presence. AKASAKI handles the ending theme “Shake Na Baby,” setting the perfect tone for each episode’s conclusion. The anime broadcasts every Tuesday on Kansai TV and Fuji Television’s new programming block “Ka-Anival!!”
Should You Actually Watch This Right Now on Crunchyroll
If you love anime blending extreme violence with genuine romance, Marriage Toxin delivers pure chaos. The pairing of a lethal assassin with a marriage swindler creates genuine comedy gold while exploring loyalty, family duty, and unexpected human connection. With 16+ volumes of manga source material and a proven creative team, expect consistent storytelling quality.
The global premiere screening at Sakura-Con 2026 on April 4 featured Haruki Ishiya himself, indicating strong international marketing support. Stream it now on Crunchyroll and catch up before discussion overwhelms your anime communities.
