Holding the title of the strongest and known across the world as an invincible Demon Lord with no equal, Mineria effortlessly crushed any enemy in an instant with her vast magical power. Yet, precisely because of her overwhelming might, she was hopelessly bored.

One day, she happened to pick up a certain book.

Deciding to cast the spell written inside just to kill some time…

Out of nowhere, an erotic trap dungeon materialized! And due to an imperfect ritual formula, she—the very caster—ended up trapped inside?!

To make matters worse, the dungeon’s weakening effects reduced her prized magical power down to the level of an ordinary monster. The only way to lift the curse is to fight her way out of the dungeon all on her own…

Toyed with by monsters she had always looked down upon, betrayed by subordinates who were supposed to be her allies, yet unexpectedly saved by creatures she had once abandoned…

Her boring days have suddenly turned into an unwanted, chaotic grand adventure. Will Mineria be able to safely escape her own castle and reclaim her true power?!