High school girl Mitsugu Bamba is an extreme blood donating enthusiast. By chance, she encounters and brings the beautiful Mai home with her. However, Mai has a secret: she is the descendant of a prestigious vampire clan! Furthermore, the timid girl is unable to bite and suck blood from humans. Mitsugu drags her school's doctor and classmates into the situation as she struggles every day to acquire blood so that Mai can survive.

[Source: Crunchyroll]