In the silent collapse of the world, Kotae and Kika find themselves thrust into a reality where survival is uncertain and trust is a luxury. As society crumbles around them, they forge a bond that becomes their anchor—learning to rely on each other through every hardship. But in a world where danger wears many faces, and even kindness can cost too much, they must decide what’s worth protecting… and who they’re willing to become when everything familiar is gone.