City of Gods

Hundreds of years ago, the barrier fell, and human civilization fell into the abyss. Beasts of disaster entered human cities, and civilization was crumbling... With the destruction of civilization, humans spontaneously formed a community, and the survivors outside the barrier did not know where to go... With the advent of the barrier, the mirror world fell to the earth, and monsters tore open cracks, carrying threats, eroding the world... Until the end, the world was in ruins, and the boy just stood on the land, holding up the torch, leading the survivors, and declaring war with the gods.