After sacrificing his life to save a child, office worker Akira Yagami wakes up in a different world—reborn as a frail goblin. Fortunately, he receives a special skill that vastly prolongs his lifespan beyond what his kind normally lives and lets him absorb the powers of goblins who have died. In a world filled with mighty races such as demons and elves, Akira embarks on his journey to become the most powerful goblin of all.