Princess Nightmare

Princess Nightmare (プリンセスナイトメア) is a manga series by Mei Noguchi. It was serialized in Comic Avarus.

Plot
For her birthday present, she wishes she could be an ordinary girl. She commutes to Rose Academy in Usuyami Town. She is Little, a beautiful 114 year old vampire. Her brother Radou watches her, there's a werewolf servant Inukai, and the magical boy Shinji. The ghost that threatens Little's school life has appeared.