The sixth prince, King Su, was the God of War of the Yehan Kingdom, but because of his unreliable emperor father, he married a girl who owned a tavern as his princess. The key is that this princess always had the ability to make him half-dead.
Jinzhu, who was running a tavern as expected, had her peaceful life broken by an imperial edict granting a marriage, and transformed into the enviable Princess Su, and she flew up the branches from then on.