A man's wife walks out on him. He feels like shit and ends up getting drunk. Good thing he has custody of their teenage daughter. Time to Merry Christmas that bitch instead!
Seven years after running away from his cruel father and cutting all ties with his family, Kengo receives a desperate plea for help from his ten step-sisters. He decides to return home and help them escape from the clutches of his perverted father. But first, he needs to analyze the situation...with his dick.
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.