Do you ever wonder, what is the next step for a demon lord after he conquers the world?
Conquer another one, of course, the bigger one.
Zaiden, a man from earth, died and reincarnated to a fantasy world and became the demon king, when he finally came back to earth he got transported to another fantasy world by God.
This is the story of a demon lord that successfully conquer the world and ready for the next one.
(This is my first fiction, so if you find anything wrong, please tell me so I can correct my self. Oh and I'm not a native English speaker so if I make a mistake, I'm truly sorry)