Living alone is easier—the wild nature will readily feed a small settlement. But the catastrophe brought the Earth people to a worse place: here, the main enemy is not nature, and a tiny army is not enough to fight it. Settlements are burning; lines of prisoners disappear without a trace on Hyaitan lands; the enemy fleet shows all its power. The question of unification becomes a matter of survival—but solving it is no easier than dealing with the Haits’ army.