Secret training sessions at a men's esthetic spa are exposed, featuring married women, popular girls, and a woman with a Kansai accent. Inside the shop, clients are shown receiving guidance from staff, including forceful penetration and intense movements. In the married woman's case, she is roughly penetrated and writhes in agony from vigorous doggystyle thrusting. The number one popular girl endures the manager's sexually harassing treatment, reaching climax repeatedly. Once aroused, she passionately sucks the penis and catches the semen in her mouth. The girl with the Kansai accent receives instruction from both the manager and a regular customer; when the manager suddenly leaves, she allows the customer to penetrate her. When the manager returns, he embraces her tightly as she cries and moans. All women endure aggressive treatment, writhing intensely in overwhelming ecstasy.