The Sky Cracks and the Gate of Hell Opens

After the "Heaven Breaks", the world became the "Underworld". Meteorites brought the consequences of the collapse of the underworld, the rules of physics failed, and ancient folk taboos became the rules of survival. In the ruins of the city, evil spirits permeated the air, and evil spirits were rampant. The world was divided into different "Underworlds", and each area has its own unique rules and horrors.