In the 31st year of the New Era, mankind has basically completed the exploration of all planets in the solar system, but the earth's resources have also been exhausted. The resource crisis began, and humankind was torn apart. The old humans who lived on Earth and Mars with the sun as the center, and the asteroid belt as the boundary, entered a state of war with the new humans who were mainly active in space cities and aimed at developing resources outside the solar system.
It was during this era that the "container" was built.
Before I was fifteen years old, the unreachable gray top of the box was my sky. It wasn't until the rebel artillery blasted away the gray metal sky that starlight from light years away shone into my eyes for the first time.
Concept: The universe is ruthless, but I rewrite the universe.