Celestia takes a vacation away from Equestria for a few days, and Luna begs to be left in charge. Celestia decides to give her sister a chance. Unfortunately, Celestia made a mistake, and Luna does several questionable and ridiculous things, like deciding to make Pinkie Pie a princess, making friends with some parasprites, and traveling back in time to say hi to an old friend. And those aren't even the worst parts.
I decided that there isn't enough silly Luna fanfiction, so I made one because Luna is best princess.