"Keep quiet and relax ... I don't want to hurt my doll." The professor's tongue and fingers gently traced over my body to see the shape, and the paranoid caress continued. Ritsu, whose apartment was burned down by a fire, is helped by Sagimori, a professor at the university who happened to pass by. Ritsu, who has lost her relatives and has no relatives, will stay overnight with the good intentions of Sagimori, but in the room where she was told not to approach, she peeks into the strange secret of Sagimori! Ritsu, who knew the rumor that his fiancé had escaped on the day of his marriage and was still missing, misunderstood ...!? Attacked on the first night ... What do you mean ―――― !?