Shouta Kodama, an ordinary young man, gets inadvertently caught up in a hero summoning ritual. Betrayed by the very heroes he was summoned alongside, he is cast into the deepest depths of a dungeon. However, his unparalleled good fortune takes the stage when he manages to harness his one and only skill, claiming the ultimate dungeon guardian, the Machinador, as his personal ally.
With his new partner, the invincible Asuka, Shouta embarks on a whirlwind adventure across an unfamiliar world, gradually climbing his way to greatness. This self-proclaimed epic tale delves into the bond between Shouta, an ordinary human, and Asuka, the ultimate weapon created millennia ago.
