The Demon Queen(Vampire Knight fanfic)

This is a vampire knight fanfiction, but this story doesn't have much in common except for vamipires, purebloods, Kaname, Yuuki, Zero, the school and other stuff that make vampire knight vampire knight. I am not going to use the story plot or have Yuuki in focus. She will only be a close friend of the main character. Anyway here's the story info:

Cross Academy, a place where both humans and supernatural attends. The humans are in the day class while the supernatural beings are in the night class. The supernaturals have ranks they have to follow. The lowest rank are where the zombies and ghosts are while in the highest are where the vampires are, but there are still one being that are higher than even vampires in rank. And that's the demons. There aren't many pureblood demons, but there aren't any demon mix blood either. Because demons don't mix with other beings, but that would change now.