Han Congyu is the most talented knight in the empire. He's also handsome, noble-born, and the recipient of the highest honors at a young age.
The only fault anyone can find with him is that he submits to neither Heaven nor Earth. Pride fills every breath he takes, and defiance is woven into his very bones.
At last, after his arrogance lands him in catastrophic trouble, Han Congyu is given two choices.
The first is to have his honors stripped, his talents destroyed, and be cast out of his family.
The second is to willingly become the princess's loyal retainer, protecting her as she passes the examination to become the empire's heir.
With those two options before him, there is no real choice.
Han Congyu asks, reluctantly, "Which princess?"
"Princess Songfu."
Han Congyu: "?"
That useless princess who does nothing but eat, drink, and have fun, traded her brains for beauty, and lies flat in the sun whenever she gets the chance?
*
With the examination to choose the empire's heir fast approaching, Songfu, who has spent years keeping a low profile and barely making it to adulthood in the imperial family, is eager to try her luck.
The Han family worries that an unsheathed blade may harm others and itself.
So, as the examination begins, they strike a deal with Princess Songfu, impressed by her character.
Songfu thinks, They want me to be the scabbard for Han Congyu's sword?
Easy.
All I have to do is become his master.
Theme: Keeping each other in check