She is a misunderstanding.
Only because the Fourth Young Master suddenly disappeared on the eve of his ascension to the throne, she had the opportunity to become his replacement. No matter what, what you want to do and what you should do are inherently different.
She was also a misunderstanding.
He concealed his identity but was accidentally noticed by the cabinet ministers, and became the current emperor's attendant.
Who exposes whom first, and who sinks to whom first.
Make a decision or be forced to choose.