The Lost Sovereignty

In the battle to defend the Magical Empire, he was defeated by the combined efforts of five heroes

At the brink of life and death, he utilized soul magic to traverse to Earth

In this realm called Earth, he recuperated for eighteen years, ultimately seizing a once-in-a-millennium opportunity to return.

One's own world

However, when he finally returned after much hardship, he discovered.

This world is already completely different from the time he is in

And thus, a new legend unfolds