So the white haired FL is a fake saint that knows it and just wants to go into exile so that she isnt killed, because she is being blamed for a couple murders. But in order to get into the magic kingdom she wants, she needs to be free of all criminal charges, so she needs to investigate who the real culprit is. The culprit is the blonde guy - her fiance who is obsessed with her, but she refuses to believe it cuz he has golden retriever energy around her.
My Villain Fiancé is Interfering With My Flowery Path