Hikaru, a wife who lives harmoniously with her husband and his parents. Her mother-in-law says she wants to see her grandchild's face, but in reality, Hikaru is worried that she can't be positive about sex. When Hikaru consults with her father-in-law, she is told that she doesn't know the pleasure of sex yet. For her husband's sake, and for her mother-in-law's sake, Hikaru decides to accept her father-in-law's "adherence training".
