MARRIAGETOXIN

⭐7.5(53155 votes)

•2026

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Episodes

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.

2. What Is "Charm," Anyway?

Kinosaki takes Gero to practice dating in a floating art museum that becomes the scene of a heist.

3. My First

Gero fights a Water Master to rescue Himekawa, but his real challenge is taking her on a date afterward.

4. The Sound Master

Gero goes undercover as a student to guard a corporate heiress, but he isn't the only Master on campus.

5. Lord Chladni

A test of courage seems like a romantic opportunity, but it turns out to be a deadly trap.

6. Together With Me

Panicked students try to sacrifice Ureshino, and stopping Naruko is the only way to make them see reason.

7. Episode 7

Available on May 19, 2026

8. Episode 8

Available on May 26, 2026

9. Episode 9

Available on June 2, 2026

10. Episode 10

Available on June 9, 2026

11. Episode 11

Available on June 16, 2026

12. Episode 12

Available on June 23, 2026

13. Episode 13

Available on June 30, 2026

Overview

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 ...