Cross Academy is an elite boarding school featuring two distinct, segregated classes: the Day Class and the Night Class. Outwardly, Yuuki Cross and Zero Kiryuu serve as prefects, striving to maintain order among the students as the classes switch in the evenings. Since the Night Class consists of exceptionally handsome elites, this task can occasionally prove challenging. However, it is absolutely essential, as these "elites" are actually vampires. Yuuki and Zero function as guardians, safeguarding the Night Class's secrets and ensuring the safety of their unaware daytime peers. As the adopted daughter of the academy's chairman, Yuuki approaches her duties with a serious and energetic demeanor. This role also enables her to interact with Kaname Kuran, the president of the Night students' dorm, who is both her secret crush and her savior. Zero, conversely, harbors a deep-seated hatred for vampires and, at times, does not hesitate to kill them. Can vampires and humans coexist, even within the rigid structure of Cross Academy? Only time will tell.