Born as the heir of a low-ranking noble, Noir faces the abrupt cancellation of his job opportunity on the verge of beginning his career. Despite his meager possessions, he harbors a unique talent – the power to communicate with a renowned sage, albeit at the cost of excruciating headaches. Adrift in uncertainty, Noir seeks guidance from the sage, who steers him towards an enigmatic underground labyrinth teeming with mystical creatures and treasures. Within this hidden realm, Noir undergoes rigorous training, accumulating both skills and riches, with the ultimate goal of reshaping his destiny through newfound strength.