SSS-Rank Overlord: Defend the Dungeon or Die

I never asked to be a hero. But I sure as hell never asked to be the final boss.

One minute, I was a normal college student. The next, I woke up in another world with a system message that sealed my fate:

[Welcome. You have been chosen as a Dungeon Master.]

My new job?

Build an infinite fortress of monsters and traps to crush the heroes who come for glory.

Forget saving the world—I'm the villain they fear.

The heroes are coming. My dungeon is hungry.