Yuki Cross is a first-year general education student at Cross Academy. As a member of the Disciplinary Committee, along with her childhood friend Zero Kiryu, her duty is to keep the infatuated Day Class students from chasing the beautiful Night Class students, all while performing the important task of protecting the secret of the Night Class. The secret…that all members of the Night Class are vampires!!

Shojo, supernatural. One girl, several lovely vampire guys. Math is pretty easy. Careful, they bite.