"On that day, a miraculous event struck the ‘most unlucky man in the world.’" Fukutaro Kamisaki's life had always been abandoned by luck. Far from happiness, constantly used by his companions, he was ultimately cursed by an evil god with the worst "Disaster Skill." However, due to the effect of this Disaster Skill: Grand Reversal, all of his stats were completely flipped — and only his "Luck" skyrocketed to an insane level. In an instant, he became the adventurer with the highest luck stat in the world, and now, together with a down-on-her-luck goddess, he takes on the divine trials created by the gods — the dungeons!