Science fiction at first, fantasy later. Female protagonist + transmigration in the opposite direction + technomagic + lighthearted tone + a super-new-system, regiment-level ancient civilization + mystery
A once-glorious civilization suddenly vanished, leaving behind an empty starry sky and the remnants of its soul.
What else is here?
A primitive society, starkly bare, yet with no shortage of food and drink, where people spend their days seeking pleasure;
A sun that never sets, though the planet isn't tidally locked, and magic that should be impossible;
Modern clothing paired with a feudal political system. None of it is science fiction or fantasy.
But that has nothing to do with me. All I want is to obtain detailed information about that ancient civilization.