Belle Lablac was born as the only human being in anthropomorphic world. Having no fangs, fur, or scales, she lived a lonely life with no one else could identify with. She set out on a journey to find her roots, carrying the Runding, sword.

A girl disguised as a boy must hide her secret amongst a boy's dorm full of vampires.

Before eradicating humankind from the world, the gods give them one last chance to prove themselves worthy of survival. Let the Ragnarok battles begin.