Kyosuke decides to stay overnight at his classmate Kazuma's house to study for the exam. Kyosuke is completely captivated by Kazuma's mother, Kayoko's plump body, and her sultry sex appeal. That night, Kyosuke wakes up to a strange noise and leaves the room... There he saw Kayoko astride her husband, swaying her hips frantically. Kyosuke spends a sleepless night with the excitement of seeing the whole story. The next day, he meets Kayoko in disgust, but she can't get her mind off her last night's stupidity...
