Kouhei is a photographer who, due to an accident involving paranormal forces in his early childhood, is oblivious to spirits and the supernatural (which he specializes in photographing). He is an "Ama Lamia" (Vampire Lover), meaning no vampire can make him their servant. Furthermore, vampires who feed on him have their servitude ties with their masters broken, making of him a threat to the vampires' society structure. Later it is revealed that he possesses great spiritual powers which were sealed by his family in order to allow him to live a normal life, as they were too strong for him to control. From their first meeting, he and Hazuki have a tempestuous but affectionate relationship that eventually turns into romance. In the manga, Kouhei's surname is Midou.

Source: Wikipedia