Mistaken for Her Kept Man, I'm the Dragon Prince

Synopsis of Mistaken for Her Kept Man, I'm the Dragon Prince: Karen, the First Prince of the Dragon Clan, has exhausted his dragonborn powers defending the Northern Frontier and is now on the brink of death. He returns to the royal capital to claim the Dragonbone Heart, his only hope of survival. Hoping to surprise his younger sister, Princess Lilian, he arrives alone three days ahead of his delegation.