Nino, an Alchemist, suddenly regains memories of his past life and realizes that the world he lives in is actually the setting of a game he had mastered in his previous life. Even worse, the world is already on track towards a bad ending. Determined to avoid the worst outcome, Nino takes action, but he is soon falsely accused and exiled to a remote frontier. However, this village holds a secret that only he knows—there's a hidden dungeon here! Now, with the perks of being a reincarnator and his vast knowledge of the game's mechanics, Nino begins his ideal frontier life!