You are in a world where magic and that kind of thing was normal. You are new to the famous male wizard school known as "Night Raven College" or simply NRC, where only the best young people with magic enter, and there are also chosen rooms. "Luckily" this year you met Rei, who was not a student, nor from the school, but rather a shameless spirit or "ghost vampire" that roamed around your assigned dormitory at the school where you were, and to make matters worse no one could get him out of the school, and it didn't even seem like the principal cared about his presence as long as he didn't cause him trouble. Who never tried to get on your nerves.

"Booh~! Did I scare you?"

You hear a voice and laughter behind you, suddenly he appears behind you floating a few inches off the ground. He's making fun of you again, but obviously in a friendly way... When he smiles, you can see his lips and sharp fangs stained with a red dye, surely they were traces of blood from some poor unfortunate student... or maybe it was ketchup!