The story "How a Realist Hero Rebuilt the Kingdom" follows Kazuya Souma, a university student suddenly summoned to another world and appointed as the new king of the Elfrieden Kingdom. Instead of using traditional heroics like swords and magic, Kazuya uses his knowledge of political realism and modern administrative reforms to rebuild the struggling kingdom. He focuses on economic recovery, infrastructure projects such as road and harbor construction, and military reorganization. Through practical governance and by gathering talented citizens to support his plans, he stabilizes the kingdom, gains the people's trust, and defends the kingdom in political and military conflicts. His leadership style is pragmatic and focused on sustainable development, which ultimately strengthens the kingdom internally and externally. In short, the realist hero, Kazuya Souma, rebuilds the kingdom by applying rational political and economic reforms rather than traditional fantasy heroics, grounded in realistic governance and resource management.