In every world, people could always live amid boundless nature.
Lush forests.
Vast lands.
Refreshing grasslands.
Bustling cities.
These were places humanity had once conquered, important nests that allowed life to thrive, symbols of the future and prosperity.
Yet in this world, such scenery no longer existed.
There were no traces of humanity upon this land.
There was no hint of life in this nature.
The barren world was filled with nothing but invaders who brought despair, terror, and gloom.
As for humanity and the other forms of life, they had long since been driven from this land.
Of course, humanity had not vanished from this world.
They had merely left the surface and gone to places where they could survive.
Thus, in a certain corner of the world, more than three thousand meters above the ground, there stood a city.
Yes.
A city.
In this sky, a city floated suspended.
It was a city shaped like an island, with its upper half covered in towering buildings and its lower half consisting of a huge inverted triangular rock, its exterior enclosed by an enormous dome and surrounded by giant rings that slowly revolved, making it look like a miniature planet.
----"Floating City."
A city that relied on enormous Flying Stones to float in the sky.
It was a city created through the fusion of modern magic and advanced science. It was also humanity's refuge in this world, with not only surface facilities for people to live in but also various underground facilities such as factories. Even while floating in midair, it could carry out all kinds of activities just like those on the ground. It was humanity's final fortress, as well as the last place where life could continue to thrive.
And in this Floating City, there existed guardians of