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Poison Master Hikaru Gero is preparing for his most challenging mission yet—getting married! However, after dedicating his life to training as one of the world's most lethal assassins, Gero finds himself completely out of his depth when it comes to dating. Luckily, Mei Kinosaki, an experienced marriage swindler, has all the expertise on love that Gero lacks. Together, this improbable pair will go to any lengths to ensure Gero gets married—even if it means confronting the entire criminal underworld in the process! (Source: Viz) Official English release available on MANGA Plus and Viz (Shonen Jump).

Associated Names

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Marriage Toxin
วิวาห์แต้มพิษ (SIC)
マリッジトキシン
매리지 톡신

Official Webtoon

  1. MANGA Plus
  2. Viz (Shonen Jump)

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Rating(3.9 / 5.0, 14 votes)
5 stars
5(36%)
4 stars
4(29%)
3 stars
3(21%)
2 stars
2(14%)
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Popular Reviews All reviews
  1. septimus_heap7
    septimus_heap7 rated it
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    OK, so there's only 24 chapters out right now, and I don't usually review series this early, but this one is genuinely impressive, and surprisingly progressive and thoughtful in ways I didn't expect, especially for a Jump+ manga. I don't think I've ever been this excited for a Jump+ series since Jigokuraku.

    And this manga certainly comes swinging right out of the gate. It starts a bit scattered, with the premise of a "team-up between a hitman and a marriage swindler" looking like prime, if a bit predictable, romcom action fare, but this series is earnest as all hell. Any other series would have the swindler's sob story revealed to be a hoax, but here the story plays it completely straight -- they really are doing it to earn money for their brother's surgery. Any other series would have played the marriage swindler Kinosaki's propensity for crossdressing as a joke or a point of contention, but other than the initial surprise, the protagonist Gero simply accepts this as a fact, and the story moves on.

    For a series about a hitman looking for a marriage partner in order to save his lesbian sister from a loveless marriage, Marriagetoxin is astoundingly good-natured and serious about having its main character build honest, open relationships with other people, whether romantic or otherwise. While Kinosaki proposes putting his skills to use as a bodyguard or hostage rescuer in order to get more girls, the story does a surprising amount to humanize the women he meets, including making them instrumental to their own rescues. And despite Gero clearly looking for a romantic relationship, he treats these women as their own people, always putting their needs first, and actually tries to become friends with them first and foremost.

    Seriously, don't be fooled by its premise -- this is just an overall really refreshing and kind series about connecting with other people in the guise of a romcom battle shounen. I sincerely hope that it's doing well in the rankings, since I definitely don't want this series to end anytime soon.

  1. M4s4ki
    M4s4ki rated it
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    This is phenomenal manga, the first 30 chapters are great, however

    why the fuck did they feel to need to introduce the mutant guy, there was no real reaspn for him to even be here on the manga, during his fight with mc, it was not even a fight as the mc got his ass handed to him. I really hate that, because if the mc is a part of the big 5 families and has been doing assasin worm for so long, i thought he would be able to inflict more damage or such. I really hated that new male character and i hated the arc on the island. The island arc was way too fucking long than all the other arcs. And the villian was not at all i teresting. Both the villian and the mutant dude were the most blandest characters i have seen in this manga

    Long story short, if you hate bland character types, as soon as you reach a secrion where a man is introduced, skip to 47, because that man and the arc that follows after are imo the worst part of the manga atm.

  1. nishant_sahu
    nishant_sahu rated it
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    And no, it's not a BL. Well, not yet atleast, don't know if they'll go that route. Anime_axe describes it really well.

  1. Daoist99taoistIDR
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    It's the story about the mutant assassin and his femboy wingman cruising for the honey. What is there not to like?

    Update: So far all of the girls introduced are on point. Just as crazy and colorful as the main duo.

  1. Maochan02
    Maochan02 rated it
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    Is it a BL?

  1. NovelGodDao
    NovelGodDao rated it
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    The hell i read this last year and never realize that the art is dogshit
  1. Pr0copio
    Pr0copio rated it
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    No more boobs
  1. FallenAngeI
    FallenAngeI rated it
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    There is another main series of this one. It's a sequel but takes place in a parallel timeline to this one, its called "The Raven Does not Choose It's Master" and fan translated in mangadex (not available in here). The Anime also somewhat combining the story of this and the sequel.

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