After the climatic disaster of the world government in early 2100. An insane professor discovered Mana. This professor found a way to crystallize the mana, but this changed the world forever. Dungeons formed and created monsters. These monsters are now a constant threat to the world. Now 50 years after the birth of the first dungeon we follow a young boy on his journey as a dungeon diver. This is the rewritten story i posted on webnovel under the same username RasterG