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Series · 2026 · Animation

Marriage Toxin

★7.4 2026 2 Seasons TV-MA

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!

Seasons & episodes

2 seasons · 13 episodes

The Poison Master's Search for a Bride

Episode 01

The Poison Master's Search for a Bride

Apr 7, 2026 · 24 min

An assassin must marry to appease his clan and save his sister. Small problem: He doesn't know how to date.

What Is "Charm," Anyway?

Episode 02

What Is "Charm," Anyway?

Apr 14, 2026 · 24 min

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

My First

Episode 03

My First

Apr 21, 2026 · 24 min

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

The Sound Master

Episode 04

The Sound Master

Apr 28, 2026 · 24 min

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

Lord Chladni

Episode 05

Lord Chladni

May 5, 2026 · 24 min

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

Together with Me

Episode 06

Together with Me

May 12, 2026 · 24 min

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

The Bug Master's Wedding

Episode 07

The Bug Master's Wedding

May 19, 2026 · 24 min

Gero goes to see his friend get married, only to run into some particularly unwelcome wedding crashers.

The Hitman Hunter

Episode 08

The Hitman Hunter

May 26, 2026 · 24 min

Gero takes a job to protect a fellow Master from a man who can go toe-to-toe with the expert assassins.

The Animal Kingdom

Episode 09

The Animal Kingdom

Jun 2, 2026 · 24 min

To save Arashiyama, Gero and friends storm into the Beast Clan's home ground.

Good-for-Nothing

Episode 10

Good-for-Nothing

Jun 9, 2026 · 24 min

Gero and Arashiyama start to bond, but a run-in with their biggest enemy ruins the mood.

Offering

Episode 11

Offering

Jun 16, 2026 · 24 min

Kinosaki and Piichi sneak into a Beast Clan lab and witness bizarre experiments with blood.

Heart and Soul

Episode 12

Heart and Soul

Jun 23, 2026 · 24 min

To stand a chance against the Beast Master, Gero must get in touch with the essence of his Poison Blood.

Thanks, Man

Episode 13

Thanks, Man

Jun 30, 2026 · 24 min

Arashiyama throws a party to thank Gero, and Kinosaki sets out to make sure it takes a romantic turn.

About the series

Marriage Toxin poster
Audience score
★ 7.4 /10

based on 53 votes

Synopsis

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!

AnimationAction & AdventureComedy

Cast

8 principal cast

Haruki Ishiya

Haruki Ishiya

Hikaru Gero (voice)

Shion Wakayama

Shion Wakayama

Mei Kinosaki (voice)

Anna Nagase

Anna Nagase

Kyoko Himekawa (voice)

Mariya Ise

Mariya Ise

Shizuku Ushio (voice)

Asaki Yuikawa

Asaki Yuikawa

Shiori Ureshino (voice)

Soma Saito

Soma Saito

Genya Naruko (voice)

Hinano Shirahama

Hinano Shirahama

Kimie Arashiyama (voice)

Shimba Tsuchiya

Shimba Tsuchiya

Piichi Nakagawa (voice)

Where to watch Marriage Toxin

Marriage Toxin is available to stream on Flicksy via 6 verified sources, aggregated from publicly available embed providers. The animation has 2 seasons and 13 total episodes, rated 7.4/10 by 53 viewers.

Frequently asked

How many seasons does Marriage Toxin have?

Marriage Toxin has 2 seasons with 13 episodes in total.

Is Marriage Toxin still on the air?

Marriage Toxin is currently in production and returning for new episodes.

What network airs Marriage Toxin?

Marriage Toxin airs on Fuji TV, Tokai Television Broadcasting, Kansai TV, Fukui TV, Hokkaido Cultural Broadcasting, Iwate Menkoi Television, Sendai Television, SAGA TV, Ishikawa TV, TNC, OHK, Kochi Sun Sun Broadcasting, Television Shin Hiroshima System, TV Shizuoka, NST, NBS, Sakuranbo TV, TSK, Ehime Broadcasting, KTS, Fukushima TV, AKT, Toyama Television, TV Kumamoto, Okinawa Television Broadcasting, KTN.

When did Marriage Toxin first air?

Marriage Toxin first aired on April 7, 2026.

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