Full series · 1 credit per episode

Watch Marriage Toxin online in HD

7.42026 · Returning Series2 seasons13 episodesHD · Subtitles

Watchlist

Sign in to watch Marriage Toxin S1E1

Playback is credit-based: 1 credit for this episode. Create an account to start.

1 credit = $1 · films $5 · episodes $1

About Marriage Toxin

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!

Marriage Toxin runs for 2 seasons. Every episode page keeps the show's order, so you can watch from the pilot to the finale without hunting for the next link. Episodes are bought individually for 1 credit.

Start watching

Episodes

Season13 episodes in this season

Season 1 · 13 episodes

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.

2026-04-07 24m★ 7.0Now playing

What Is "Charm," Anyway?

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

2026-04-14 24m★ 7.0

My First

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

2026-04-21 24m★ 7.4

The Sound Master

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

2026-04-28 24m★ 6.5

Lord Chladni

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

2026-05-05 24m★ 6.2

Together with Me

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

2026-05-12 24m★ 6.5

The Bug Master's Wedding

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

2026-05-19 24m★ 7.7

The Hitman Hunter

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

2026-05-26 24m★ 7.5

The Animal Kingdom

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

2026-06-02 24m★ 7.0

Good-for-Nothing

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

2026-06-09 24m★ 7.0

Offering

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

2026-06-16 24m★ 6.2

Heart and Soul

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

2026-06-23 24m★ 6.0

Thanks, Man

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

2026-06-30 24m★ 7.5

Season 1 Season 2

Marriage Toxin FAQ

How much does it cost to watch Marriage Toxin?

Episodes cost 1 credit each. Credits are $1 each, so a full season costs the number of episodes in credits. Each episode you unlock stays in your account permanently.

Do I need an account to watch Marriage Toxin?

Yes. Create an account and add credits before unlocking an episode. Signing up is free and only needs an email and password.

How many seasons of Marriage Toxin are there?

Marriage Toxin has 2 seasons on Cineby, with 13 episodes in total. Start with season 1 below.

Where should I start watching Marriage Toxin?

Start with season 1, episode 1. The episode list on this page keeps the order, and the player moves to the next episode when one ends.

Can I watch Marriage Toxin with subtitles on my phone?

Yes. The player includes a CC menu where available, and the whole site is built for mobile. Fullscreen and picture-in-picture are supported.