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Marriage Toxin, Vol. 15

By Joumyaku
Series: Marriage Toxin
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Brief Description
Gero may be a master assassin, but he’s not exactly killing it in the romance department! Can marriage swindler Kinosaki help him find true love? Poison Master Hikaru Gero is about to take on his most challenging assignment yet—getting married! Gero couldn’t be more clueless when... Read More
Format: Paperback / softback
$2099
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Releases 15th December 2026 (Approx. Date) Pre-order  "Marriage Toxin, Vol. 15" now to secure your copy from our first shipment

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Gero may be a master assassin, but he’s not exactly killing it in the romance department! Can marriage swindler Kinosaki help him find true love?

Book Hero Magic formatted this description to make it easier to read. While it's new and still learning, it may not be perfect - your feedback is welcome! Description

Gero may be a master assassin, but he’s not exactly killing it in the romance department! Can marriage swindler Kinosaki help him find true love?

Poison Master Hikaru Gero is about to take on his most challenging assignment yet—getting married! Gero couldn’t be more clueless when it comes to dating, but thankfully, marriage swindler Mei Kinosaki knows everything there is to know about love. Together, this unlikely pair is going to do whatever it takes to get Gero hitched—even if they have to take on the entire criminal underworld in the process!

Young entrepreneur Shiori Ureshino’s family business is in trouble! With the schemes of a rival competitor driving her company’s profits down the tubes, Ureshino turns to Gero for help. Will the Poison Master be able to help her turn the company around? Plus, while Gero is busy working with Ureshino, he also finds out that someone’s been manipulating Kinosaki behind his back! The question now is, what nefarious purpose could they possibly have for targeting his marriage advisor?!

Series: Marriage Toxin

View all
  • Marriage Toxin, Vol. 1
    Marriage Toxin, Vol. 1 by Joumyaku presents the intriguing tale of Gero, a master assassin who excels in his deadly craft, yet struggles in the matters of the heart. Can marriage swindler Kinosaki be the one to guide him towards finding true love? Poison Master Hikaru Gero is on a mission unlike any other he's faced before—getting married! While Gero...
    By Joumyaku
    Paperback
    $1900
    Elsewhere:
    $2099
    Available
    Ships in 4-6 weeks
  • Marriage Toxin, Vol. 9
    Gero may be a master assassin, but he’s not exactly killing it in the romance department! Can marriage swindler Kinosaki help him find true love? Poison Master Hikaru Gero is about to take on his most challenging assignment yet—getting married! Gero couldn’t be more clueless when it comes to dating, but thankfully, marriage swindler Mei Kinosaki knows everything there is...
    By Joumyaku
    Paperback
    $2099
    Available
    Ships in 4-6 weeks
  • Marriage Toxin, Vol. 8
    Marriage Toxin, Vol. 8 explores the unexpected collaboration between a master assassin and a marriage swindler. Gero may excel in lethal skills, but romance is a completely different battlefield for him. Can the expert matchmaker Kinosaki guide him towards true love? Poison Master Hikaru Gero faces his most daunting challenge yet—getting married! Completely inept at dating, Gero is fortunate to...
    By Joumyaku
    Paperback
    $2099
    Available
    Ships in 4-6 weeks
  • Marriage Toxin, Vol. 10
    Gero may be a master assassin, but he’s not exactly killing it in the romance department! Can marriage swindler Kinosaki help him find true love? Poison Master Hikaru Gero is about to take on his most challenging assignment yet—getting married! Gero couldn’t be more clueless when it comes to dating, but thankfully, marriage swindler Mei Kinosaki knows everything there is...
    By Joumyaku
    Paperback
    $2099
    Available
    Ships in 4-6 weeks
  • Marriage Toxin, Vol. 5
    Gero may be a master assassin, but he’s not exactly killing it in the romance department! Can marriage swindler Kinosaki help him find true love?Poison Master Hikaru Gero is about to take on his most challenging assignment yet—getting married! Gero couldn’t be more clueless when it comes to dating, but thankfully, marriage swindler Mei Kinosaki knows everything there is to...
    By Joumyaku
    Paperback
    $2099
    Available
    Ships in 4-6 weeks
  • Marriage Toxin, Vol. 2
    Gero may be a master assassin, but he’s not exactly killing it in the romance department! Can marriage swindler Kinosaki help him find true love?Poison Master Hikaru Gero is about to take on his most challenging assignment yet—getting married! Gero couldn’t be more clueless when it comes to dating, but thankfully, marriage swindler Mei Kinosaki knows everything there is to...
    By Joumyaku
    Paperback
    $2099
    In Stock
    Ships today
  • Marriage Toxin, Vol. 3
    Gero may be a master assassin, but he’s not exactly killing it in the romance department! Can marriage swindler Kinosaki help him find true love?Poison Master Hikaru Gero is about to take on his most challenging assignment yet—getting married! Gero couldn’t be more clueless when it comes to dating, but thankfully, marriage swindler Mei Kinosaki knows everything there is to...
    By Joumyaku
    Paperback
    $2099
    In Stock
    Ships today
  • Marriage Toxin, Vol. 11
    Marriage Toxin, Vol. 11 by Joumyaku delves into the intriguing life of Gero, a master assassin who excels in his lethal profession but struggles in matters of the heart. Can marriage swindler Kinosaki turn his romantic fortunes around? Poison Master Hikaru Gero is about to embark on his most challenging mission yet—tying the knot! Unfortunately, Gero is utterly clueless when...
    By Joumyaku
    Paperback
    $2099
    Available
    Ships in 4-6 weeks
  • Marriage Toxin, Vol. 12
    Gero may be a master assassin, but he’s not exactly killing it in the romance department! Can marriage swindler Kinosaki help him find true love?Poison Master Hikaru Gero is about to take on his most challenging assignment yet—getting married! Gero couldn’t be more clueless when it comes to dating, but thankfully, marriage swindler Mei Kinosaki knows everything there is to...
    By Joumyaku
    Paperback
    $2099
    Available
    Ships in 4-6 weeks
  • Marriage Toxin, Vol. 4
    Gero may be a master assassin, but he’s not exactly killing it in the romance department! Can marriage swindler Kinosaki help him find true love? Poison Master Hikaru Gero is about to take on his most challenging assignment yet—getting married! Gero couldn’t be more clueless when it comes to dating, but thankfully, marriage swindler Mei Kinosaki knows everything there is...
    By Joumyaku
    Paperback
    $2099
    In Stock
    Ships today
  • Marriage Toxin, Vol. 6
    Gero may be a master assassin, but he’s not exactly killing it in the romance department! Can marriage swindler Kinosaki help him find true love? Poison Master Hikaru Gero is about to take on his most challenging assignment yet—getting married! Gero couldn’t be more clueless when it comes to dating, but thankfully, marriage swindler Mei Kinosaki knows everything there is...
    By Joumyaku
    Paperback
    $2099
    Available
    Ships in 4-6 weeks
  • Marriage Toxin, Vol. 7
    Gero may be a master assassin, but he’s not exactly killing it in the romance department! Can marriage swindler Kinosaki help him find true love? Poison Master Hikaru Gero is about to take on his most challenging assignment yet—getting married! Gero couldn’t be more clueless when it comes to dating, but thankfully, marriage swindler Mei Kinosaki knows everything there is...
    By Joumyaku
    Paperback
    $2099
    Available
    Ships in 4-6 weeks

Book Details

INFORMATION

ISBN: 9781974768462

Publisher: Viz Media, Subs. of Shogakukan Inc

Format: Paperback / softback

Date Published: 05 November 2026

Country: United States

Imprint: Viz Media, Subs. of Shogakukan Inc

Contributors:

  • Illustrated by Mizuki Yoda

Audience: General / adult

DIMENSIONS

Spine width: 20.0mm

Width: 127.0mm

Height: 191.0mm

Weight: 179g

Pages: 208

Collections

Fiction Graphic Novels Joumyaku Manga Pre-order Books Pre-orders Pre-orders by Release Date Series: Marriage Toxin

About the Author

Joumyaku kicked off his career in 2021 when he wrote two one-shots, “Hyper Hard Special Mission” and “Reisougyou no Arai-kun” (Ghost Sweeper Arai-kun), published in back-to-back months of Jump+. The following year, Joumyaku partnered with Mizuki Yoda to release his first serialization, Marriage Toxin.

Mizuki Yoda first hit the manga scene with his one-shot “Jigoku no Sata mo Ryuu Shidai” (The State of Hell Depends on the Dragon), which was published in Shonen Jump NEXT! in 2015. In 2016, he and Tomohide Hirao teamed up to create the one-shot “Legacy,” which ran in Weekly Shonen Jump as part of the Gold Future Cup. His first series, Ne0;lation, was completed in 2019, and three years later he began working on his next series, Marriage Toxin, for Jump+.

Also by Joumyaku

View all
  • Marriage Toxin, Vol. 1
    Marriage Toxin, Vol. 1 by Joumyaku presents the intriguing tale of Gero, a master assassin who excels in his deadly craft, yet struggles in the matters of the heart. Can marriage swindler Kinosaki be the one to guide him towards finding true love? Poison Master Hikaru Gero is on a mission unlike any other he's faced before—getting married! While Gero...
    By Joumyaku
    Paperback
    $1900
    Elsewhere:
    $2099
    Available
    Ships in 4-6 weeks
  • Marriage Toxin, Vol. 9
    Gero may be a master assassin, but he’s not exactly killing it in the romance department! Can marriage swindler Kinosaki help him find true love? Poison Master Hikaru Gero is about to take on his most challenging assignment yet—getting married! Gero couldn’t be more clueless when it comes to dating, but thankfully, marriage swindler Mei Kinosaki knows everything there is...
    By Joumyaku
    Paperback
    $2099
    Available
    Ships in 4-6 weeks
  • Marriage Toxin, Vol. 8
    Marriage Toxin, Vol. 8 explores the unexpected collaboration between a master assassin and a marriage swindler. Gero may excel in lethal skills, but romance is a completely different battlefield for him. Can the expert matchmaker Kinosaki guide him towards true love? Poison Master Hikaru Gero faces his most daunting challenge yet—getting married! Completely inept at dating, Gero is fortunate to...
    By Joumyaku
    Paperback
    $2099
    Available
    Ships in 4-6 weeks
  • Marriage Toxin, Vol. 10
    Gero may be a master assassin, but he’s not exactly killing it in the romance department! Can marriage swindler Kinosaki help him find true love? Poison Master Hikaru Gero is about to take on his most challenging assignment yet—getting married! Gero couldn’t be more clueless when it comes to dating, but thankfully, marriage swindler Mei Kinosaki knows everything there is...
    By Joumyaku
    Paperback
    $2099
    Available
    Ships in 4-6 weeks
  • Marriage Toxin, Vol. 5
    Gero may be a master assassin, but he’s not exactly killing it in the romance department! Can marriage swindler Kinosaki help him find true love?Poison Master Hikaru Gero is about to take on his most challenging assignment yet—getting married! Gero couldn’t be more clueless when it comes to dating, but thankfully, marriage swindler Mei Kinosaki knows everything there is to...
    By Joumyaku
    Paperback
    $2099
    Available
    Ships in 4-6 weeks
  • Marriage Toxin, Vol. 2
    Gero may be a master assassin, but he’s not exactly killing it in the romance department! Can marriage swindler Kinosaki help him find true love?Poison Master Hikaru Gero is about to take on his most challenging assignment yet—getting married! Gero couldn’t be more clueless when it comes to dating, but thankfully, marriage swindler Mei Kinosaki knows everything there is to...
    By Joumyaku
    Paperback
    $2099
    In Stock
    Ships today
  • Marriage Toxin, Vol. 3
    Gero may be a master assassin, but he’s not exactly killing it in the romance department! Can marriage swindler Kinosaki help him find true love?Poison Master Hikaru Gero is about to take on his most challenging assignment yet—getting married! Gero couldn’t be more clueless when it comes to dating, but thankfully, marriage swindler Mei Kinosaki knows everything there is to...
    By Joumyaku
    Paperback
    $2099
    In Stock
    Ships today
  • Marriage Toxin, Vol. 11
    Marriage Toxin, Vol. 11 by Joumyaku delves into the intriguing life of Gero, a master assassin who excels in his lethal profession but struggles in matters of the heart. Can marriage swindler Kinosaki turn his romantic fortunes around? Poison Master Hikaru Gero is about to embark on his most challenging mission yet—tying the knot! Unfortunately, Gero is utterly clueless when...
    By Joumyaku
    Paperback
    $2099
    Available
    Ships in 4-6 weeks
  • Marriage Toxin, Vol. 12
    Gero may be a master assassin, but he’s not exactly killing it in the romance department! Can marriage swindler Kinosaki help him find true love?Poison Master Hikaru Gero is about to take on his most challenging assignment yet—getting married! Gero couldn’t be more clueless when it comes to dating, but thankfully, marriage swindler Mei Kinosaki knows everything there is to...
    By Joumyaku
    Paperback
    $2099
    Available
    Ships in 4-6 weeks
  • Marriage Toxin, Vol. 4
    Gero may be a master assassin, but he’s not exactly killing it in the romance department! Can marriage swindler Kinosaki help him find true love? Poison Master Hikaru Gero is about to take on his most challenging assignment yet—getting married! Gero couldn’t be more clueless when it comes to dating, but thankfully, marriage swindler Mei Kinosaki knows everything there is...
    By Joumyaku
    Paperback
    $2099
    In Stock
    Ships today
  • Marriage Toxin, Vol. 6
    Gero may be a master assassin, but he’s not exactly killing it in the romance department! Can marriage swindler Kinosaki help him find true love? Poison Master Hikaru Gero is about to take on his most challenging assignment yet—getting married! Gero couldn’t be more clueless when it comes to dating, but thankfully, marriage swindler Mei Kinosaki knows everything there is...
    By Joumyaku
    Paperback
    $2099
    Available
    Ships in 4-6 weeks
  • Marriage Toxin, Vol. 7
    Gero may be a master assassin, but he’s not exactly killing it in the romance department! Can marriage swindler Kinosaki help him find true love? Poison Master Hikaru Gero is about to take on his most challenging assignment yet—getting married! Gero couldn’t be more clueless when it comes to dating, but thankfully, marriage swindler Mei Kinosaki knows everything there is...
    By Joumyaku
    Paperback
    $2099
    Available
    Ships in 4-6 weeks

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