Vampire Knight: Guilty

Yuuki Cross and Zero Kiryuu serve on the disciplinary committee at Cross Academy, which has two distinct classes: the Day Class and the Night Class. The Night Class students are vampires, and this fact is hidden from the Day Class. Yuuki's past connection to Kaname Kuran, the leader of the Night Class, complicates her feelings towards him, especially since they're now working together. Zero's strong anti-vampire stance stems from a personal history that threatens the fragile balance at the academy.