The Prince and the Pauper (Run Yu and Yu Yan, Exchanging Identity Jokes, Friendship)

I briefly scanned my brother's "The Fox in the Screen", and then I came up with this sudden idea. It tells the story of the fox demon Yu Yan and the emperor Runyu who discovered that they looked exactly the same, so they decided to switch identities for a day and experience each other's life. The timeline after the original drama of Xiangmi and Pinglihu is not Narcissus. The included CPs are Runyu x Kuang Lu, Yu Yan x Xue Jing.