A Hero Who Usurps the Throne? No, I'm Just a Regent of the Empire

The brave man who conquered the Demon King volunteered to guard the border lords, and used the knowledge before time travel to develop step by step, and became the regent of the empire through physical means. Princess: "You are treason!" Luo Wen: "Your Majesty, this is the side of Qingjun." Noble: "This guy has no chivalry." Luo Wen: "I believe in Taoism and value Taoism and nature. Tao is ballistic gun and marksmanship."