The story follows our protagonist, who discovers that he has been transported along with his class to another fantasy world. However, things do not go as he wishes. This new life is far more difficult than he imagined. In a future where war and dehumanization have become a constant, a being with a lost identity faces his fate as an immortal warrior of the Empire. As he fights in ruthless battles, he is forced to confront his own humanity, his loyalty to a relentless regime, and his gradual transformation into a war machine—all while an impending war looms ever closer. Throughout his journey, he questions his purpose and the true nature of what it means to 'protect.'