A Hino Matsuri's manga.
I really like it. The drawings, the story... Zero~
It talks about the student's live for vampires and humans (with a dark story behind them), and a love triangle between a pure blood vampire (Kaname), a vampire hunter (Zero), who is also a vampire ^^U, and the girl without memory (who loves the vampire, but cares a lot about the hunter) Yuuki.

I love Zero!! (the vampire hunter). He is the best!!
(Kaname is handsome too, but he isnt Zero)

Some pics