Here’s the thing about elite assassins—in fiction, anyway. We obsess over their precision, their cold efficiency, their ability to eliminate a target from three kilometres away. But hand them a dating profile and watch the whole apparatus crumble. It’s the professional hazard nobody trains for.
Marriage Toxin, the forthcoming anime adaptation from Jomyaku and Mizuki Yoda’s manga, seems to understand this irony instinctively. The second promotional trailer dropped this week, and with it comes confirmation of an April 7 premiere on Kansai TV and Fuji TV’s freshly minted Ka-Anival!!
programming block.
The Musical Credentials
Yurina Hirate—formerly of Nogizaka46 fame—lends Kill or Kiss
as the opening theme, while AKASAKI’s ending track Shake Na Baby
promises a rather different tonal palette. Her involvement suggests this isn’t your standard jump-chase-punch affair.
Production Pedigree
- Bones Film handles animation under Studio BONES—the house behind Mob Psycho 100 and My Hero Academia
- Motonobu Hori (Carole & Tuesday) directs
- Series composition by Kimiko Ueno (Delicious in Dungeon)
- Soundtrack via Taisei Iwasaki and Yuma Yamaguchi
Voice Cast
Haruki Ishiya leads as Hikaru Gero, joined by Shion Wakayama (Lycoris Recoil), Anna Nagase (Jujutsu Kaisen), and Mariya Ise (Hunter x Hunter). Casting directors clearly weren’t penny-pinching.
The Premise
Gero, heir to a centuries-old poison-master dynasty, faces a grim family mandate: his younger sister must marry and produce an heir. He volunteers himself instead—landing in the culturally alien territory of romance. His solution?
Retain a marriage swindler as his dating coach. It’s My Fair Lady meets organised crime.
Release Schedule
Shueisha releases the seventeenth compiled volume on April 3. The anime arrives four days later. What a relaxed timeline. Genuinely, what a relentless schedule.
The underlying tension fascinates—someone trained to end life systematically now must convince another to build one with him. Does Gero’s tactical brilliance translate at all, or does romance demand entirely different instincts?
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