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

While Ein and the others were fighting the paladins, Lilith was busying herself with watching over the entire dungeon. She ordered the wolves and goblins to move the captured soldiers to their confinement areas in batches, making sure that there was no chance of them fighting back.

"... This feels ominous," Lilith muttered.

The situation was too peaceful. The enemy, with a high chance of being Lucifer himself, should have a good grasp of their power. Despite that, they sent 5 million troops almost unprotected and even used 500,000 paladins as some sort of diversion.

As someone who knew Lucifer's personality and his meticulousness regarding planning, she knew that it wasn't the end of it. She nervously scoured the entire dungeon for signs of him but was left with absolutely no trace of him whatsoever.

Minutes passed, and Lilith's suspicions grew into doubt. "Was I just overthinking it?"

Knock First Before You Enter!