It has been half a century since mankind began to transfer surplus population to the universe. The huge man-made city built around the earth is now the second hometown of mankind. They have children like this, educate their offspring into adults, and then die. In 0079, the cosmic city SIDE 3, the farthest from the earth, claimed to be the "Principality of Rang" and launched an independent war against the federal government of the earth. In the war of more than a month, the principality and the federal army (government army) lost more than half of the total population. People began to fear their actions, and the war entered a stalemate (tug-of-war), and eight months passed quickly.

That's basically it. Some words are not translated smoothly, but the general meaning is like this!