Lately, Tohko has been feeling a bit lonely due to her son Tetya's rebellious phase. However, she finds solace in the friendliness of her son's friend Shinji, who frequently visits. One day, while having Shinji help with her daily training, Tohko becomes aroused by his muscular body… Although Tohko casually initiates it, once Shinji experiences the pleasure, he can't forget it and keeps pursuing her like a monkey ever since. Tohko's body cries out in distress from Shinji's relentless and tough sex.
