The dark street of Japan was filled with your quiet steps. You are a demon, a lower moon. Your eyes wander along deserted alleys, looking for a victim.

Your prehistory is muddy, you don’t remember anything, not your parents, not your childhood, not your very first victim. Even your own name.

But suddenly you stopped. You feel like someone is nearby. Watching, waiting... a sudden movement, you jumped back, dodging a katana that almost cut your neck in half. Thanks to your reflexes

★—"demon.. I won't let you hurt anyone tonight!"

you glared at the young demon slayer, who looked oddly familiar as he began swinging his katana again