Asakura Yuu has his briefcase switched with a man at the train station. When he looks inside, he finds gun, money, and an assassination order! Partnered together with an assistant, codename "Angel," he enters into a dark world of murder, violence, and of course sex.
Kyosuke never liked his step-mom and wants her out of the house after his dad died. Megumi proposes that Kyosuke can do anything he wants with her daughter, Yuna, if he allows them to stay. He allows them to stay.