After a misunderstanding caused by three arrogant adventurers, a second-class soldier, who spent most of his life as a simple guard, is dismissed and forced to leave the country he dedicated 3 years of his life to protect and serve with devotion. Yet no one mourned his departure. What neither he nor anyone else knew was that during his time in the sewers of the capital, he had hunted extremely dangerous monsters and become the most powerful. Unaware of this, the soldier sets out to find a job. Along the way, he meets a beautiful student, is wooed by people, and is surprised by events he considers inappropriate for him. But misunderstandings multiply and the soldier continues to act without realizing it. Who would have thought that a social outcast would become a very powerful man?