This prevent the usurpation of the throne, since ancient times, the empress of the nation needs to be a man. And the chosen crown prince needs to be under the care of the said empress while cutting off the relationship with his own birth mother. The said crown prince too after being chosen, needs to chose a male consort before ascending the throne.
Lou Jing, a high-ranking military officer and heir to a military peerage, was forced to marry the Crown Prince as his male Consort. Doing so meant that he would no longer be the heir to the peerage. He tries to decline it for it was not an edict but he was forced to accept it when his own father beat him almost to death when he reject it without any explanation when he ask.
After the marriage, the secret was reveal that his father is currently waiting for another child from his new wife and intent to drove his name out of the family's heritage.
Even the Crown Prince was scheme by the evil and greedy minister who plotted with the beloved consort of the current emperor, wanting to promoted her own child to take his place.
The only option left to Lou Jing now is to help the Crown Prince to protect the Empire against the evil people scheming against him!
“My Empress, please note that I’m technically the husband here,” says the Emperor.
Lou Jing smirked and picked up the Emperor in his arms. “Of course, your Majesty. This loyal subject will make sure he doesn’t tire his husband out in bed!”