I'm about a third of the way into my second manga in my uber-scientific and methodological study of vampire mangas, and so far, Vampire Knight is full of win.
The story takes place in a boarding school called Cross Academy, named after it's president, Mr. Cross. Cross adopted a young girl named Yuuki (sometimes spelled Yuki) after she was rescued by the vampire Kaname from another, evil vampire. Kaname clearly has the hots for Yuuki, but he can't do anything about it because if he drinks her blood, she will be become an "E-class" vampire--the lowest of the low on the vampire totem pole; basically a mindless monster that sucks people's blood. Meanwhile, Yuuki has developed a close relationship with Zero, another orphan Cross adopted after he was rescued from a vampire. Unlike Yuuki, however, Zero didn't emerge unscathed from his vampire attack. He also clearly has the hots for Yuuki, not that he'd ever admit it.
So far this manga is extremely addicting. The English translations can get a little wonky and difficult to understand, but the illustrations can be really beautiful; and every chapter so far is successfully adding more and more layers to the story and characters. The heart of the story is the love triangle between Yuuki, Zero, and Kaname. At first I have to admit I liked Zero, but now he's getting on my nerves with his constant whining and pouting. Plus Kaname is much better dressed. ;-)
I would definitely recommend this manga. Look for updates as get farther into the series.
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