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

A little earlier, right after Nayta and Melina entered the room, Ein's eyes automatically turned to the two. It had been quite a while since he last saw the two together, so a smile naturally floated to his face.

However, his smile turned to a frown shortly after. Two elven princes came forward and started talking to Nayta. Their eyes, as Ein would describe them, were filled with not adoration but lust. Although it was partly his own fault, Ein didn't know about it yet.

Ein felt a burning jealousy rushing up from his core. It was to the point that he got too distracted and couldn't hear the words of the princesses around him. However, at the same time, doubt budded inside his mind.

'Why am I getting jealous? Nayta and Melina should be able to choose their own partners in life...'

I know Lust, But What is Love?