This is a great anime if you like vampires and demons. It about a boy who is the forth progenitor (a vampire with unlimited power and immortality). He is followed by a sword shaman (a sword fighter) of the lion organization she is a year younger than him. They don't really get along in the beginning but they star to develop feeling fit each other fairly quick into the anime. The really cool and unique thing is that ths anime is separated into 4 episode story arks, something I have never seen before.
