He arrived in the world of One Piece by wearing human clothes, but due to the limitations of the human race, he became a weakling and was even relegated to Branch 157, which is known as the Navy's retirement home.

However...

Years later, what was once a dilapidated building and the 157th branch of a few marines...

But it has reappeared before everyone as a modern city!

(Science fiction + space opera + civilization war, hardcore battlefield and philosophical questioning intertwined)

Warships roared, all races trembled, and humanity rose to prominence.

From the solar system to the core of the universe, from the brink of extinction to the throne of supremacy.

This is an epic of bloodshed, a hymn to rebellion, and the most insane gamble of civilization.

Conquer the stars or become dust in the universe.