The hospital where Kitada Yuuho of the Nurse changed its job had a strange promise. "Never approach the operating room after 12:00 at midnight"! . However, be the days of a certain night duty…The Yuuho which lost in Koukishin opens a door of the Kindan. There were strange a large quantity of medical appliances and a scene of the new kind medicine experiment on a human body for Uraryuu Tsuu by doctors there. Break a promise, and the Yuuho discovered by doctors becomes the new sacrifice. In addition, a gentle smile has disappeared from one, this hospital….
