Arsrod, a young boy, eagerly awaits the day he receives his "profession" from the temple. In this world, adults receive professions like swordsmen or magicians upon entering adulthood. Among them, the strongest is said to be the magic swordsman. The boy is the second son of a minor lord, and his elder brother, who inherited the lordship, sends him to the front lines, putting him in a position where he could lose his life on the battlefield at any time. Becoming a magic swordsman might change this situation. Even past heroes were all magic swordsmen. However, the boy receives neither a magic swordsman nor an ordinary profession like a warrior. It was a mysterious profession that even the temple people didn't understand: Oda Nobunaga. But this profession is top-level in combat, and also has high internal affairs capabilities, such as turning small cities into large commercial cities, and military command capabilities. It's as if it were made for him to create a country and become a hegemon! The boy eventually decides to overthrow his brother and take the position of lord, and further to become king and create a country. He realizes that this is the best way to protect the people and those dear to him.