Yuka, a serious female college student, was not satisfied with SEX, but an event occurs that destroys her values for sex. - Her fathers friend Akikawa, who had her tutor when she was little, gets drunk on her liquor, and she attacks Yuka who has grown into an adult body. - She was confused, but from the middle she was struck by the skillful technique of a middle-aged man that she had never felt with her boyfriend. - From that day on, just looking at the old man made her lustful and super-sensitive.