Jindai Saku was an awakener who could never clear quests or level up. After enduring years of a miserable, stagnant life, he encounters a rare phenomenon: a "Dungeon Mutation." Risking his life to break free from his despair, he dives inside and miraculously undergoes a second awakening! He gains the unique power of the "Slime Lord."

Utilizing his new abilities and a loyal army of obedient slimes, Saku decides to do the unthinkable—he starts a farm right in the middle of the dungeon! Soon, his crops and crafted items generate unimaginable wealth, and an eccentric cast of monsters gathers around him. From the absolute weakest to an unparalleled master, Saku's ultimate dungeon slow life with his new companions begins!