Aki Kamiya, a married woman whose son is about to take his high school entrance exams, arranges a private meeting with the school's vice principal at her teacher's suggestion. The vice principal proposes that if she can provide a large sum of secret money, her son's admission will be considered. However, Aki admits she cannot prepare the full amount. At that moment, the man sits beside her and says, "I'll make sure you properly compensate me," as he begins groping her mature, ripe body insistently. Following his orders, she changes into a micro bikini and is then brought to climax with vibrator and electric massager torture. Seduced by the middle-aged man's skill, she is overwhelmed by pleasure unlike anything she's ever experienced when his thick cock penetrates her. Before she realizes it, she's thrusting her hips not just for her son's sake, but for her own pleasure, transforming into a lustful, insatiable woman consumed by desire.