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

Ahead of Ein and the others, a fierce battle was unfolding.

A fist met another fist, cracking the ground and the entire space, summoning black lightning from the collision of their mana.

*BAM!* *BOOOM!* *CRACKLE!* *BAM!*

Each of their actions was fast enough to leave after images, but both sides have yet to suffer a direct hit.

"Hah! Woman, I praise you for lasting this long!" Gene smiled wickedly as the two of them exchanged blows. "But you shouldn't push yourself! Is that worm over there worth wasting years of your lifespan for?!"

Lilith gritted her teeth. Not because she was angry at Gene, but rather due to the pain she was constantly suffering while in her current form. This final form of hers, other than wasting a year of her lifespan for every second it was used, also placed a heavy toll on the user's body.

And We Lived Happily Ever After... Or Not?