One is a Northern Zhou princess who is not loved by her mother, and the other is an idle heir apparent.
Zhou: Neither Your Highness nor I are good people, so why not start a business together first?
Su Mingzhao: Since you are making small moves with me to do business, it would be better for me to kill you.
Zhou: I mean the same thing.
…
Zhou: Your Highness, I am pleased with you.
Su: But I am engaged.
…
Zhou: What about now?
Sue: Can I trust you?
Zhou: Why not give it a try?
Purpose: When one day meets A and B, the old illness will go away.