Eri was shocked to learn that her son, who was about to get married, was still a virgin. "But you've dated other girls before. Have you really never done it?" If things continue like this, their smooth married life will be in danger. "There's not much time until the wedding. What should I do..." Eri, worried about her son's future, decides to teach him sex from scratch with her own body in order to give him some experience.
