---I dressed as the current princess, but I have a twin sister who has never been seen.
---The world only knows that I am gentle and dignified, but they don't know that my sister will take my place every full moon night.
---His Royal Highness the Crown Prince treats me very well. He often touches my face and says, "My beloved concubine is particularly lively today."
---He didn't know that every time he said this, he was facing a different person.
---Until that day, my sister chuckled in my ear: "Sister, we all seem to have fallen in love with him."
---The prince is standing outside the door, holding the secret message in his hand for us to exchange identities.