Boku no Noroi no Kyuuketsuki

The world is full of vampires. Supernatural creatures who drain the blood from humans without mercy—fighting such beings is the foundation of Isuzu Osaka’s life. But humanity is losing the war, and so desperate times call for desperate measures...And so, Isuzu sets out to strike a deal with a powerful vampiress whose beauty drives all who gaze upon her insane in the hopes of protecting his friends...

(Source: Yen Press)