Both are historical/fantasy mini dramas in which the FL is able to or is forced to change her face, and she then marries the ML in the place of someone else.
Both are mini dramas in which the FL is a spy who marries the ML on a mission. Unbeknownst to her, the ML is also a spy who wears a mask who she has fought with before, but he is now pretending to be weak or out of his mind.