thirsty for blood

shadow joins a group of vampire killers because he absolutely hates them, but once he joins he sees a girl....a girl thats so pretty, so sweet, nothing at all like other girls......he grows to like her......but soon as he starts working at his new job he discovers that, that girl that he has grown feelings tords is a......vampire who will suck blood.......will shadow kill her or will he never think of doing it and help her....find out........... (sonics a female in story)