Yuu, a mother, was happy that her son had made a friend, Yoshino, a diligent honor student. However, Yoshino's real target was Yuu's voluptuous body. Taking advantage of her son's absence, Yoshino attacks Yuu. Yuu thinks about her son and endures the humiliation, but she can't help but feel aroused by the young cock. When Yoshino finds out, her violent behavior gradually escalates...