The Emperor's Son-in-Law

After waking up from a dream, his soul traveled to Dakang, and Duan Chun became the only son of the Duke of Changguo of the Dakang Empire.
Six sons competed for the throne, and Duan Chun was inexplicably involved!
You all want to harm me? Come on, my father, the Duke of Changguo, is so arrogant!
My father can't stand it... I still have my father-in-law, His Majesty, to protect me.
His Majesty can't do it either?
Well, then let my wife take over, my wife is the Princess of Dakang!
In fact, Duan Chun is the arrogant existence that everyone fears the most.