The Banished Demon Lord Goes to Earth!

Exiled by her own kind and sealed by a hero, the demon lord is finally revived after an eternity. She awakens in a wasteland, with a dark sky full of twinkling stars. The air feels thinner, and her body strangely light... After gathering herself and trying to sense the hero's presence, it seems the hero is on a distant blue planet in the sky...? She doesn't know exactly where she is, but one thing is certain: the demon lord will fight to defeat the hero!