People like Masayuki Takano

Blood Alone is a vampire manga with crime fiction undertones, written by Masayuki Takano (高野 真之, Takano Masayuki), author of Boogiepop Dual. It was originally published as a dōjinshi. The manga ended abruptly in Spring 2014, however the story was concluded in a doujinshi.

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.