Series synopsis
Marriage Toxin, also known as マリッジトキシン is a Japanese animation action & adventure comedy television series that premiered on Fuji TV on April 7, 2026. It stars Haruki Ishiya, Shion Wakayama, Anna Nagase and Mariya Ise.
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!
Premise
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!
Cast and characters
Leading cast
- Haruki Ishiya as Hikaru Gero (voice)
- Shion Wakayama as Mei Kinosaki (voice)
- Anna Nagase as Kyoko Himekawa (voice)
- Mariya Ise as Shizuku Ushio (voice)
- Asaki Yuikawa as Shiori Ureshino (voice)
- Soma Saito as Genya Naruko (voice)
- Hinano Shirahama as Kimie Arashiyama (voice)
- Shimba Tsuchiya as Piichi Nakagawa (voice)
Supporting cast
- Haruka Shiraishi as Akari Gero (voice)
- Isamu Yusen as Toshiki Hanamaki (voice)
Episodes
This series spans 1 season with 13 episodes.
| Season | Episodes | First aired | Last aired |
|---|---|---|---|
| Season 1 | 13 | April 7, 2026 | June 30, 2026 |
| Episode | Title | Air date |
|---|---|---|
| 1 |
The Poison Master's Search for a Bride An assassin must marry to appease his clan and save his sister. Small problem: He doesn't know how to date. |
April 7, 2026 |
| 2 |
What Is "Charm," Anyway? Kinosaki takes Gero to practice dating in a floating art museum that becomes the scene of a heist. |
April 14, 2026 |
| 3 |
My First Gero fights a Water Master to rescue Himekawa, but his real challenge is taking her on a date afterward. |
April 21, 2026 |
Production
Release
| Original network/platform | Fuji TV |
|---|---|
| First aired | April 7, 2026 |
| Last aired | June 30, 2026 |
| Runtime | 24 minutes |
| Status | continue |
| Schedule | Tuesday at 23:00:00 |