St. Lunatic High School(2004)

Yoru ni mo Makezu!

Forced to attend the prestigious St. Lunatic High School, Niko Kanzaki discovers a haunting secret in her demon-filled night classes! She applies higher learning to find out the differences between humans and demons, but the handsome and mysterious Ren shows her that the races also share some things in common...

(Source: VIZ Media)