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! Gero and Protector Chinatsu Akakura are partnering up for yet another job, and this time, they're in real trouble! When their seemingly meek client turns out to be the former head of the Iron Clan, Gero and Akakura quickly realize that this job is much bigger than either of them ever expected.