Luna has been considering the matter for a while, and she can't put her hoof on why. Confused and irritated, she goes to her sister in search of enlightenment.
Luna reread the graffiti, but it came no closer to making sense. “Princest Is Wincest,” it said. It was confusing enough to be offensive; did nopony spell correctly anymore? Perhaps Tia would be able to explain it.
After an accident involving one of Starswirl's objects, Luna gets turned into a stallion. She'll have to contend with judging nobles, romantic mares, paparazzi, and her obnoxious sister in order to find a way to turn her back.
When Twilight is awake, Celestia is her teacher, and she a faithful student. But when Twilight shuts her eyes, another mare approaches, who teaches her a very different lesson.
Book Two of the Lonelyverse. Having gotten through Harry's first year with a lot of excitement, him and the alicorns thought they could unwind. Sadly, it was not to be. House elves, giant snakes, hidden chambers... Looks like another eventful year!