Marriage Toxin, Vol. 1Gero may be a master assassin, but hes 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 yetgetting married! Gero couldnt 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