Modern Japan is infested with "vampires" who mimic humans and eat them. There were girls who secretly fought with silver weapons in hand to hunt them down! A unit of "problem children" among vampire exterminators, commonly known as "Madara-sou". The new person assigned there is Reo, a girl with a secret. The woman she met there, Kaori Kiriya, was one of the most ``dangerous'' women in Madarasou... Exciting, extreme, and sometimes friendship. Hunt, hunt, hunt! Girly “vampire” action!!