I Was Given a Golden Finger, but My Best Friend Didn't Use It!

What would you do if you traveled through time in a novel and found yourself transformed into an emperor? Xu You realized it. There is only one word to describe it: cool! Who is she afraid of, the giant golden finger who has the right to know the entire book? The villain who usurped her power? Catch it. The hero who destroyed her country? Catch it. Until she saw her best friend who was carried away by the guards—— Best friend, what are you doing! Good guy, it turns out that the ultimate villain who wants to subvert her empire is actually her best friend who came through time.