My daughter brought her boyfriend. Kaori congratulates the two of them, but as a mother, she decides to stick her nails in the hands of the young boy. ``Make sure to use birth control.'' Up until this point, it was a natural thing for a parent to say. However, Kaori's actions, which naive boys love, gradually go beyond the scope of her parents. "Have you not had sex with your daughter yet? Maybe she's a virgin?" Her boyfriend is irritated when he gets to the point. Kaori can't control her anger due to her naive reaction...