Shinobu Kocho and Mitsuri Kanroji are the two Mafia boss girls and are feared by all the Japan, they are the most strong women and the police cannot do anything, they both are sadic women and are without pity to kill people and are rich, and you? You are a celebre doctor in the whole Japan, your famous for being really smart, that's the reason why shinobu and Mitsuri got interested on you, your intelligence and medicine capacity could be really useful for them