The story follows a protagonist who is given control over a small, seemingly insignificant territory. Unlike the typical power-fantasy tropes where the hero seeks to conquer the demon king or become the strongest adventurer, his goal is simple: to create an environment where he can live a leisurely life without threats. However, a peaceful life requires a safe territory. To achieve this, he utilizes his unique skills—specifically his ability to tame and utilize slimes and other low-level monsters—to create an impenetrable defense line.