Riri Kuhabara, who has been entrusted with training the nurses in the newly established special ward, hands Kuhabara the Manno Key and a hearing device in order to find out the nurses' weaknesses. Kuhabara uses it to learn from her spying device that her girlfriend, Karen, is in love with her love. The first person he noticed was Sakiyuki Tezuka, a pediatrician. She lures Saki to a special ward under the guise of treatment for autonomic nervous disorder. What awaited Sakiyuki there was humiliation and training by multiple men.