SeraphWedd

In the year 2025, for unknown reasons, dungeons started appearing all around the world. Monsters started invading nearby cities and massacring the citizens. The world population was dropping by the millions each day. To fight against the monsters, the whole world decided unanimously to create genetically modified human beings called "Warriors" by injecting a serum they called "Elixir". Thus, started the counterattack of the human race.

On a certain day 12 years after the start of dungeon appearance, while raiding the last and hardest dungeon in the world, an event occurred. After getting betrayed by his teammates, Warrior Ein was pushed down a bottomless pit just before facing the last boss as a sacrifice. Regret filling his heart, he cursed at his former teammates, swearing to take revenge against them before losing consciousness.

However, when he opened his eyes, he found himself as a dungeon master in a new world. Since he will die if the dungeon gets conquered, he decided to protect his dungeon from invaders while searching for a way to return to Earth. Will he be able to return to Earth and enact his revenge?

I am a Problematic Dungeon Master

Lately, Ein's hatred for the three traitors, Dean, Andre, and Sherry, has faded quite a bit. It was to the point that their faces faded from his memory, as only their blurred figures remained.

It must be related to how he's living his life much better since he became a dungeon master. But despite that, he can't forgive himself for forgetting his burning thirst for revenge at the beginning.

Now that Nyarlathotep had made him recall his grievances, he decided to never forget about them again. He swore that he'd definitely take revenge for all the other comrades who were sacrificed too.

"That's all of my business done here. Then, I shall take my leave," Nyarlathotep said as he started to float. His six cute protrusions, or legs, waved in the air as if he were walking.

Just before reaching the ceiling, he turned around and stared at Ein one last time. "Right, before I forget... Make sure to choose your friends wisely next time."

Looks Like I Need To Take Over The World