I think we'll all be here a while, so I'll probably get the occasion to share the story later.

*Shura scratched her chin.* How to explain... the demon world is actually here, but, in a different dimension, if you will. Demons are walking in the streets of Hinoto-Ri right now, only on on a different plane so humans and demons don't meet. At night, for some reason, the "wall" between both dimensions weakens and demons seem to appear, but they've always been there.