Satoshi and his stepmother, Chiyuki, have a very close relationship. One day, after failing miserably at a group date, Satoshi confides in Chiyuki, complaining that he doesn't understand women. On their way home, they decide to grab a drink together. However, Chiyuki gets drunk easily and quickly passes out. Seeing her asleep, Satoshi can no longer restrain himself and begins touching her voluptuous body. Soon, he undresses her and starts licking every inch of her skin. The next morning, Chiyuki insists she remembers nothing, but Satoshi presses her, saying, "You actually remember, don't you?"