By a bizarre coincidence, Tsukune Aono has accidentally gotten himself admitted to a youkai acadamy, a school attended by monsters (youkai). Just when he thinks he'll run away from there, he meets the beautiful girl Moka and his mood turns ultra happy. However, she transforms into her true form when the rosary on her chest is taken off, she's a super vampire!
If you haven't clicked my sig or some how come across the thread I made of this not too long ago then shame on you.
Personally this is one of the more enjoyable manga out there. It starts of slow and some things can be predictable but I think its charm would cause you not to care about those early and brief shortcomings. As it progresses it gets really good and has only been getting better if the raws are any indication.
Anyways go download and READ IT!
Manga discussion thread w/ DDLs