The monsters of this world exist everywhere. They hide in plain sight, and attack when your blood is warmest and senses are dimmed. These monsters are called Oni. Among the humans, are a certain group with mixed blood, three quarters human, one quarter monster. They are destined to fight off the dangerous creatures of this world, however, those dangerous creatures are also out to exterminate them. The mixed blood attracts the monsters, as if the humans are aski