When she found out that her son, Yosuke, had lost his virginity, Momoko, the mother, couldn't help but be curious about the girl. She secretly asked Yosuke's best friend, Yūya, about it. Originally, Yūya had a crush on Momoko, so he seized the opportunity to confess his own virginity and his feelings for her. Momoko, feeling sorry for him, agreed to give him a chance, saying, 'Just once.' But she ended up being captivated by Yūya's sincere feelings and intense thrusting. Momoko, drenched in the pleasure of being with a young man, couldn't forget that intense pleasure...