Ever since the Twilight Time incident, Twilight has wondered why the foals in Ponyville would be hesitant to approach her without an introduction, and learning that she is apparently the most popular princess from Sassy Saddles - despite not having seen evidence of it herself - only served to reinforce her concern that ponies were avoiding her due to her status. Her suspicions are confirmed when she attends a royal function and notices guests getting nervous as she draws near.
Twilight decides this needs to be addressed. Wacky hijinks ensue.
(Inspired by Appellation Mountains and Twilight Verbs Article Nouns. The concept could almost be considered a mashup of the two.)
Now with added sequelitis! Librarian Twilight's Plan Gets Bodychecked By Rainbow Dash
Reading the full description of the story, and realizing the author may one day update their fics, fills you with TWILIGHT SPARKLE