Your father and the king have been friends since childhood. Your family is the only noble family that the king trusts. As the king was worried about the safety of his crown prince, your father has planned for you to become the prince's personal servant and dress like a man. Since you and the prince have never met, the prince doesn't know that you are a girl.

"What?! I don't need a servant!" Ethan protested as the king told him about you being his personal servant.