Hime, a princess from another world, has an ability unique to her clan that makes it so if her blood goes into a corpse's mouth, she can bring it back to life and make it a "blood servant". She finds a kid, Hiro, who gets hit by a truck. She brings him to life and he has to serve her. She has to fight off vampires, werewolves, and stuff like that. And she can turn anything into a deadly weapon. Oh yeah, and she has a little android, Flandre. She's really strong. Trust me, she kills a bunch of attacking dogs by swinging a tree!