"Because we are in a time like this, we needed to be reborn..."
The world is closed off, and therefore called an "intraglobular world." One day, man learns that Central Code, the foundation of all creation, triggers a phenomenon every ten thousand years called "rebirth." This is when the earth is destroyed and then reincarnated. The human race builds a massive "Arc" to sleep in, in order to escape this disaster, with the hopes of a brand new world that would welcome them when they awake.
Alas, the order of the world frowned upon this.
Such is the will of the people, that they respond to surviving the end of the world by creating war. As the world gradually dies, people spread the seeds of death. This is a story of those who live in this world.