A female guest staying at a hot spring inn is summoned by a perverted masseur known for his abnormal massage techniques. Unaware that she is being secretly filmed, her body is stimulated by the masseur's hands, exposing her defenseless self. The first woman is a prim office lady who, under the effects of erotic chiropractic treatment, becomes physically aroused, accepts his penis, and writhes uncontrollably in ecstasy. The second is an office lady suffering from menstrual pain who seeks relief through massage, but is driven to agonizing pleasure and ultimate climax through his phallic-based therapy. The third is a female college student who arrives after hearing about his reputation; as she undergoes vaginal massage, her body trembles, and once penetrated, she is overwhelmed with pleasure, crying out in delight and losing all composure.