Moment of Dawn

Thousands of years ago, the two co-governing governments had long-standing grievances and launched a war that swept the entire continent. Under the smoke of gunpowder, dangers quietly grew. In less than ten years, evil beasts were rampant, thermal weapons lost their effectiveness, and people built Noah's Ark and fled to the sea. Nowadays, the Ark is wearing out day by day, and returning to the mainland has been forced to be put on the agenda. The group of "perseverants" who stayed on the mainland are now as dangerous as the evil beasts...