Gero 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! But after training his entire life to become one of the worlds deadliest assassins, Gero couldnt be more clueless when it comes to the art of dating. Thankfully, marriage swindler Mei Kinosaki knows everything there is to know about love, and together, this unlikely pair is going to do whatever it takes to get Gero hitchedeven if they have to take on the entire criminal underworld in the process!

After assessing Geros romantic qualities (or lack thereof), Kinosaki decides the best strategy to find Gero a wife is to use his impressive talents as an assassin instead! Together they respond to a job listing to rescue Himekawa, an art thief whos been taken hostagebut with a water master now standing in their way, their plan takes a turn for the worse! Can Gero win this fierce battle of poison versus water and take his first step toward marital bliss?