Vampire Knight (ヴァンパイア騎士, Vanpaia Naito?) is a shōjo manga by Matsuri Hino.
Vampire Knight primarily takes place in Cross Academy, a prestigious private school with an unusual class structure. The student body is divided into two classes: the Day Class, which is made up of ordinary students, and the Night Class, an elite group of 'beautiful people.' Unbeknownst to the majority of students, and even most of the staff, the Night Class is made up entirely of vampires. The heroine, Yuki Cross, is one of the few humans who knows the school's secret. She serves as a Guardian, dedicated to maintaining the peaceful coexistence of the Day and Night Classes with her childhood friend Zero, who lost his parents to vampires at an early age.