A Military Household in Troubled Times, Monopolizing the Princess and Taking over the World

(No system) At that time, the Great Qian collapsed and the Twelve Kings' Rebellion was staged. The nobles regarded the common people as stupid dogs. In such troubled times, fortunately, Li Guanmin's physical fitness more than doubled after traveling through time. So, hiding his own strength, he rescued the beautiful princess who had never been touched by a man in the ruined temple during a thunderstorm. From then on, under the guise of the adopted son of the King of Hejian, he gradually became bigger and stronger until he swept the world and sat on the highest position. But why is this princess becoming more and more clingy to him?