Sister Red

From the DrMaster manga outlet site:

This is the story of Mahito, Alice and the "The True One"

All sorts of odd things begin to happen when Mahito survives being rundown by a car traveling at high-speed. What lurks behind the world of the living? What is it that hides just out of sight of human perception? There is more to our world than our eyes reveal, as Mahito, a young High School girl, is about to find out. Questions mount as one thing becomes painfully clear; Mahito did not survive her accident at all.

Modern-day vampires, the occult and hunters of the undead... 'nuff said!