After his company vanishes overnight, a middle-aged corporate drone suddenly finds himself jobless… and in possession of the ultimate skill—the power to control monsters, humans, and all things alike. Set in a modern-day Tokyo struck by a bizarre phenomenon known as “Dungeonization,” where ordinary buildings transform into monster-filled labyrinths, this is a hardcore dungeon fantasy like no other! Now armed with unimaginable power, can one washed-up salaryman survive—and thrive—in a world overrun by chaos?