Nurse Kokono Isanao, known for her diligence and excellence, was promoted to head nurse, but missed chances at romance due to her marriage. Her current pleasure is indulging in intense dildo masturbation late at night when everyone else is asleep. Her moans echo throughout the hospital, sparking rumors of supernatural phenomena. One night, a male doctor accidentally catches her in the act, loudly moaning as she thrusts the dildo deep into her vagina. He seduces her, giving her the long-missed sensation of a real cock pounding her. From then on, she begins seducing one male staff member after another, igniting a chain reaction of new pleasures across the hospital.