Marriage Toxin, Vol. 12 by Joumyaku

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 taking on his toughest 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 will do whatever it takes to get Gero hitched—even if they have to take on the entire criminal underworld in the process!

Himekawa has made quite the name for herself as an art thief, but when she suddenly finds herself in need of a partner in crime, Hamster Master Arashiyama is just the girl for the job! While it’s not the partnership Gero expected to see formed in his quest for marriage, that won’t stop this new dynamic duo from taking the criminal underworld by storm!