It was the first day of summer in Ponyvile. All the fillies were out of school hanging out with friends, ponies were going to the beach, and some little fillies are going to camp over their summer. All the ponies always have something to do during the summer.
All, except one pony; Pinkie Pie, she really does love summer, but not the first week for some reason. No pony knows why, she just sits in her room frowning or even sobbing her eyes out, then by next week she is smiling, and being happy again. When somepony tries to ask her she would be sad, or even just regret it.
Speaking of Pinkie Pie, she was inside Sugar Cube Corner looking at the window with tears in her eyes. Mr. and Mrs. Cake went on vacation with their kids Pound Cake and Pumpkin Cake just a few days ago, and Pinkie was left in charge of the shop. Just then someone was knocking on the door.
Outside of Sugar Cube Corner was Twilight Sparkle. It's been a while since she became a princess, and since it's summer