The Immortal and Demon Strategy

If I command the heavens, there will be no demons beneath them. If I command the demons, there will be no immortals beneath the heavens. A young man from another world: is it an accident, or fate's endless cycle?

My master is looking for someone. He's searched for countless people, but no one knows whom he's looking for or how much longer he'll search. Is he human, a demon, an immortal, a god, or a monster? My master says a man must take responsibility for his woman. The heavens are round and the earth is square: roundness means reincarnation and fulfillment, while squareness means having edges and corners.

This novel and its characters are entirely fictional. Any resemblance is purely coincidental. Do not imitate.