The school's black principal stage of the works, students generally attend a regular school (Class Day). A handsome evening session attended by a group of elites (night class) exists. However, the evening session, the students have not been informed of the general infantry, all "vampires" that had a secret.
Yuuki major black hero, to protect the secrets of the school, students with zero cone "clerk Mamoru Mori (The Guardian)" has served. On the other hand, and I took the Vampire himself hates zero families had a big secret.
