Yurie is a sick-room teacher. She is popular among male students, but she is worried about her son, Yuu. Yuu now lives at a dormitory of her school and he is in love with Ritsuko, a matron. One day, Yuu gets badly injured in an accident. Yurie and Ritsuko start an exciting battle of taking care of him. Also, Sae, a music teacher, joins them....