Shuichi lives alone until his wife Ayumi, who was hospitalized due to an accident, leaves the hospital.The story begins when Shuichi's mother-in-law, Maya, comes to take care of her.A big bust that can be seen even when wearing clothes, and a plump soft buttocks that make the skirt burst.All of them were things that Ayumi didn't have.Shuichi, who touches the "sex appeal" that his mother-in-law smells, makes a mistake with Maya in order to escape from the ascetic life.