Recently, Naho was happy that her shy son had made a friend who was an honor student. However, this honor student, Yoshino, had a hidden side. When Yoshino saw his voluptuous mother, Naho, who looked nothing like her dull son, he unleashed his instincts as a man and revealed his hidden nature. Yoshino took advantage of Naho's weakness and tried to force a physical relationship with her while her son was away. Although Naho endured the humiliation, she began to feel aroused by Yoshino's fierce cock before she knew it...