The main character, Yuki Tsuzuki, is hospitalized at a certain clinic due to a severe cold. He is recuperating surrounded by beautiful busty nurses. Perhaps due to the medication, his memory becomes vague, and he spends his days suffering from strong drowsiness day and night. Every night, he begins to dream of a man who uses erotic techniques and engages in perverted play with a nurse. (Maybe he's just feeling frustrated...?) It worries him. Although he feels uncomfortable with the dreams, he gradually becomes absorbed in it. One day, one of the nurses, Kaena Kumada, told him that his dreams were a reality. He learns that the man in his dream is himself. At night, he can't stop the urge to attack the nurses and Yuki's behavior escalates further. Eventually, he discovered the ero room in the basement of this clinic, He will learn his true purpose for coming here.