Vampire Hunter {IwaOi}

Iwaizumi Hajime's sole goal since he witnessed the murder of his family at age eleven was to get revenge and exterminate every single vampire from the face of the earth.

Oikawa Tooru was born a vampire -- one of the rare few --, a vampire who, rarer still, wished for nothing but death to stop his need for human blood -- to stop hurting those around him.

On one of his missions, Hajime stumbles across Oikawa, who conceals his identity to live among the humans; the attraction that draws them together is undeniable and unshakable, but both of them are heavily tied to their pasts, held back by invisible chains of regret. There are only two ways their stories can unfold; they can either sink, or they can swim.
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Book One of the Hunter Series