Yuuki Cross was adopted by Kaien Cross. He is Headmaster of the Cross Academy. Zero Kiryu was adopted too by Kaien Cross becuase Zero's family got killed by a pure blood vampire. The story begins as this two, Yuuki and Zero, are in school and act as guardians for the night class in the academy. The academy holds two classes, the day class (for normal students) and the night class (for vampire students). The day class has no knowledge of the vampires. The story is just about how they fight vampires and discovering truth behind each others past.*I don't wanna be a spoiler. It is a bloody story.
The characters are a little bit cliche, noting that it doesn't take a genius to create this personalities or their physical appearance. The school uniform though is really great and that's what makes is so different. Is not like a typical japanese uniform in a certain way.http://img521.imageshack.us/i/vampireknight.jpg/ <<--- if you want to check it out. white uniform is night class.
well i would say it does fall for all that categories except for the comedy one. it does has it's funny parts but it's mostly serious.
Overall i give it 8/10
maybe i misses some parts but it's only because I cant' think of anything else and I'm also running out of time.