(has been adopted)yandere demon Slayer x reader(cult au)

a long time ago, their was a god, a really powerful god, one who gave this world life and prosperity, the people of this world were so greatful that they became obsessed over this god, one day the god vanished and left everyone in sadness, but what happens when they find out that they can bring this god back into this world, but little did they know, the god had reincarnated into a school girl on a planet called earth.(this is also a fantasy au were everyone has powers)