If you loved Vampire Knight you'll love Shuriken to Pleats!
Most of the character designs are still very similar.
The story revolves around Mikage (lit. beautiful shadow), a schoolgirl who is the descendant of ninjas. She lives in modern-day Kyushu, and she serves a certain man.
For more info check on Mangahere, but hopefully vizmedia will get a hold of it someday!
Just been watching One Piece! Almost to 400!