Meikyuu Teikoku no Tsukurikata - Renseijutsushi wa Mazu Risou no Mura wo Kaitaku Shimasu

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 knowsthere'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!