Just before her son's wedding, Eri was shocked to learn that he was still a virgin. 'But you've had girlfriends before, right? You really haven't done it even once?' If things continued like this, their smooth married life would be in jeopardy. 'There isn't much time left until the wedding. What should I do...' Eri felt anxious about her son's future and decided to teach him sexual experience from scratch using her own body.
