When a mysterious visitor approaches with an audacious offer—become a dungeon master and shape an entire realm through divine mandate—the protagonist's answer is simple: absolutely not. His comfortable life holds no shortage of satisfaction, and he sees no reason to abandon it for such an exhausting endeavor. Yet when confronted with the goddess's genuine plea for aid, his stubborn resolve begins to falter. Before long, he finds himself transported to another world, thrust into the role of dungeon master with an overwhelming responsibility: manage the dungeons and solve the critical mana circulation crisis. As the weight of his new position settles upon him, one question becomes unavoidable: how is he actually supposed to do this?