Modern World Dungeon

What would you do if you can manage a dungeon? What would you do if you can select who enter your dungeon? What if your dungeon is the modern world? What if your monsters are the people that you have defeated? And you get skills through your overall performance? Jack through some fortunate events obtain the "Manager" position of the only dungeon in the planet, now he has full control of said dungeon. He fight to let other fight. He lets others get Stronger to get Stronger. He finds the Darkness & Desire in people to show the monsters they really are. Welcome to the "Modern World Dungeon" Side note- I don't own the cover, if somebody is willing to help please contact me.