Chiaki is a veteran nurse with 20 years of experience working at Nmura General Hospital. She is loved by all the inpatients, especially the middle-aged and elderly male patients, but there is a secret behind her work... Elderly male patients have even lost the will to live after a long hospital stay and illness. The special sexual service that instantly brings back the vitality of these patients is the reason why Chiaki is called the sex mother... no, the Virgin Mother of this hospital.