Satoru has to live with his wife's parents because both husband and wife are working and it is difficult to have children. However, she is a bride who does not face child making for some reason. Finally, it became a fight, and the days when I couldn't even have sex continued. Chisato, her mother-in-law, worries about the situation of these two people. One night, Satoru sneaks into her Senri room and begins to grope her body. When Chisato wakes up, she is puzzled, but she begins to say, "It's piling up... I'll take responsibility for her daughter's selfishness."
