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 Academys dark secret: the Night Class is full of vampires! After trying to recall her past Yukis hallucinations become more vivid & she tries to strangle Zero during a fit of madness. Locked in her room all she can see is a world dyed in blood but Kaname comes for her. He tells her its time to wake up & sinks his fangs into her neck...