I'm looking for a manga and don't remember the name or artiest.?

Im looking for a manga that stars a human girl named Nanoha who loses her family and now lives in an inn (I think) and she meets demons and vampires and a cursed cat boy named Kaya. The vampire is a guy and he has a crush on the cay boy. The demon a boy has a crush on Nanoha he's also looking for his mother (who he hates) and has a little brother (who's a pain in the butt)...HELP PLEASE!