In this world, the definition of 'normal' had changed beyond imagination. Once a 'normal' world meant a world which was free from monsters. The only ways to find these monsters was through movies or games, but then, one fateful day, the 'normal' world changed.
'Dungeons' started popping up on the surface of earth out of nowhere. Few people wanted to explore these dungeons, while the rest were xenophobic¹, they had all the right in the world to think so, not many people had the guts to step into the unknown, completely aware of the fact that they could die inside those dungeons, but for some, the thrill was too much and they couldn't resist going inside the dungeon.
Ignoring the orders and guidelines from the government, a group of soldiers who were stationed to prevent others from entering, themselves defied the rules and violated a direct command from their superiors and stepped inside the portal.