Anime in which a girls family is killed and there was a prophecy? This anime was kind of strange but I will explain as much about it as I can,


There was a prophecy that had to be fulfilled, which was that this girl must have a child with the last descendant of the vampire slayers (I think), then kill both the child and the vampire slayer and bathe in their blood.
The girl was a vampire (I think) whose family was killed.
The guy was protected by a cat (an actual cat, not sure if she could transform)
The guy is in school.
The guy was reluctant to do it with a girl he just met
The girl was told this prophesy by a family member who was not present.
The family of the girl was killed by villagers and her parents sent her away to save her life.
This was not a recent anime (last few years) but I cant put an absolute time frame on it, sorry!
The male protagonist had black hair and the relative of the girl who had to fulfill the prophecy, had silver hair.


I would be grateful if you could add to this list or just give me the name of the anime, maybe adding to the character descriptions, or just the year it was released! 

It was not Omamori Himari. It has been half a month!!! Any ideas?
Elaina Lynn didn't put this down as an answer but it was called holy knight. THANK YOU SO MUCH