Perhaps it's the story of another universe.
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Ante Yisula.
It is the world where Miss Brave and the Part-time Demon King were born, both a super-Earth planet in the universe and the name of a continent on the planet.
The planet's surface has four continents—north, south, east, and west—plus a central continent, forming a cross-like distribution pattern, thus the whole is also called the Holy Cross Continent. Outside the continent lies a sea named the Lost Ocean, and above are two moons, one large and one small, orbiting, named the Red Moon and the Cyan Moon respectively.
In fact, these two moons correspond to the Demon Realm and the Celestial Realm.
Yes, the residence of Demons and Angels is not in dimensions utterly different in wavelengths, frequencies, or locations... but rather directly in outer space, on a natural satellite orbiting Ante Yisula.
But considering the special nature of this world, this is probably the natural result.
