Cross Academy is attended by two groups of students: the Day Class & the Night Class. At twilight when the students of the Day Class return to their dorm they cross paths with the Night Class on their way to school. Yuki Cross & Zero Kiryu are the Guardians of the school protecting the Day Class from the Academy's dark secret: the Night Class is full of vampires! With Kaname missing Yuki must now step in as acting head of her clan to maintain the fragile peace between the human & vampire societies. Will she be able to regain the trust of the vampire aristocrats much less Aido?