Blood Alone

Blood Alone is a manga series written by Masayuki Takano. It was originally published as a dōjinshi.

Plot
Kuroe Kurose is a former vampire hunter, turned private detective and author. He lives in a modern-day city with Misaki Minato, an adolescent girl who has recently been turned into a vampire. Kuroe's investigations often lead him to battle vampires and other undead creatures, sometimes with the support of Higure, a leading figure in the vampire world. Misaki meanwhile struggles to come to terms with her vampire nature and her love for Kuroe.