MARRIAGETOXIN

A young man named Hikaru Gero serves as a "poison user", a killer from a family business that has been passed down for hundreds of years. Engaged in shady work and not good at communicating with women, he believes he shouldn't get married. However, to continue the bloodline of the "poison user", his hometown announces that his sister will be forced to give birth to a successor. At this time, Shimoro meets Kizaki, a marriage swindler who was originally his work target...? “A proposal like that… It’s a first for me.”With a marriage con artist as the advisor, the story of a murderer’s search for a partner begins!