The world has suddenly turned into a dungeon.

Tsukasa Ninomiya, a young man aiming to become a Hunter, awakens to an S-Rank Job: Trap Master, a class that controls every trap within the dungeon itself.

Inside these walls, the one who commands the traps is absolute.

Using his abilities, Ninomiya dominates the battlefield, wiping out monsters with devastating trap chains — roaring flames, crashing boulders, spinning chainsaws, and more.

“I’ll set them… Death Traps that’ll send you straight to Hell!”

An unconventional, exhilarating battle-action saga begins as Ninomiya fights his way to the top to become the strongest in the world.