Ayaka, whose husband has been on a business trip all year round, has spent most of his life alone with his mother and child. Because of that, my son Shinsuke tends to be spoiled, and I'm worried about his future ... At that time, I see Shinsuke indulging in masturbation. As a mother, Ayaka teaches her sexuality, but Shinsuke, who has become aware of her mother as a woman, can't stand it and pushes her down. I mourn that I have done something irreparable, but since that day Shinsuke has been urging me to embrace Ayaka every time.