Aya lived peacefully with her husband and son, but she was dissatisfied with her lack of sex with her husband. Her son's friend Yuuki came to visit her at Aya's house. Yuuki gets excited watching an erotic DVD in his room and goes to the bathroom on the way. He forgot to close the door and ended up with Aya and witnessed a young erection. Since then, Aya, who can't forget Yuuki's giggling thing...?
