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

Melina was still out of sorts, unable to fully understand Ein's words. Nayta, by her side, nodded her head firmly, showing understanding in her stead.

"Alright, leave her to me," Nayta said with a resolute tone. "Please be careful out there."

Ein smiled, ruffling her hair lightly in jest before turning back to Althea and the others. "Listen, everyone. We can only leave the small fries to our defenses."

There were four powerful enemies, and as if to match them, four powerful dungeon fighters. They had no other choice but to leave the dungeon's defenses to Michelle's army, the dwarves's defenses, and the human army. Jormungand, Fenrir, and Leviathan are all going to stay put and act as emergency troops when things go awry.

"I..." Ein's voice trailed off before pointing at the screen depicting the former Giant's dungeon. "... will go here."

"Then I'll take on Samael," Lilith claimed. "I'll make him pay for his last transgression!"

I Don't Like Uphill Battles