If you accidentally damage the property of a Shinto shrine, you become a debtor. To work off the damage, you will become Miko, a servant of the temple.

But once you get used to your new unusual life, the unexpected happens: an ancient, terrible demon awakens from its sleep.

"So it was you who awakened me? When I wipe this city from the face of the earth, you will experience unspeakable pleasure."

A terrifying demon who doesn't care about human lives. It was sealed centuries ago.