Aun, a solo C-rank adventurer, acquired a magic sword in a dungeon he had luckily discovered that day. However, that night, a party of A-rank adventurers from the royal capital fatally injured him and robbed him of his magic sword. Aun thought that his life would end just like that, but for some reason he became a zombie and acquired new skills. “I will become stronger than anyone else and live as I please!” Starting from the weakest of monsters, he repeatedly evolves to become stronger. By eating the “dungeon core” that forms the core of the dungeon and continuing to evolve further, Aun aims to become the strongest. The main character, Aun, a man with no patience nor self-respect and is a little foul-mouthed, goes through repeated evolution with his trusted friends who gathered around him by a mysterious fate, and aims to create the best and strongest clan while renovating the dungeon.