How the Demon King's Castle Was Built

The universe is filled with endless darkness and chaos. In a dark corner somewhere, an utterly incongruous scene appeared.

The already barren land had been fenced off with construction barriers.

It looked just like a construction site.

No one knew what was happening inside this "construction site."

All they could hear from far away were the rumbling of machinery and one deep roar after another.

"Slacking off again! Get back to work!"

This novel and its characters are entirely fictional. Any resemblance to real people or events is purely coincidental. Do not imitate.