[Final] Marriagetoxin Episode 13 Story & Preview Cuts Released: What Will Happen to Arashiyama and Gero's Romance?

The story and preview images for Episode 13 of the TV anime Marriagetoxin (JP: マリッジトキシン) have been revealed. This episode will air on Tuesday, June 30 at 11:00 PM (JST), and will later be available on various international streaming platforms.

Episode 13 Story

The fates of Toshiro and Byakko have been entrusted to Tonako Dogo, the head of the Beast Masters. Meanwhile, Arashiyama hosts the Great Animal Appreciation Festival to express gratitude to Gero and his companions. Gero genuinely admires Arashiyama's way of life, finding her deeply cool. Seizing this perfect romantic opportunity for the two, Kinosaki activates their love-assist skills. What will happen to the future of Arashiyama and Gero's romance? Having met Himekawa, Ureshino, and Arashiyama, Gero's marriage hunting is accelerating. Meanwhile, Teruaki Gero, a member of a branch family of the Poison Masters' Gero clan, begins making ominous moves.

Introduction

Hikaru Gero, a young man inheriting this deadly lineage, has lived his entire life in the underworld, far removed from the touch of romance. To him, the concept of "marriage" was a distant dream. However, to ensure the "Poison User" bloodline survives, the head of the Gero clan issues a cold ultimatum to Hikaru's sister: she will be forced to produce an heir.

Desperate to protect his sister and resolve the succession crisis, Hikaru crosses paths with his latest target—the master marriage swindler, Mei Kinosaki. In a sudden turn of events, Hikaru decides his best option is to get married himself and recruits Mei as his advisor right then and there.

"That’s a first... for a 'proposal,' anyway," Mei remarks.

And so, with a master swindler as his guide, the elite assassin Hikaru embarks on the most difficult mission of his life: Marriage Hunting. Their goal? The perfect marriage. The curtain rises on a world-class, hardcore "marriage-hunting" battle action story, featuring the ultimate buddy duo of an assassin and a con artist!

Spring 2026 Anime List

Source : Marriagetoxin Official