Trapped In The Moon

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A pleased moan escaped Luna's muzzle as her magic pressed deeper and deeper into her rear, scratching the entirety of the plothole until the itch completely vanished. The mare clenched the muscle a few times just be be certain, but once she was satisfied the irritation was dealt with Luna took her leave of the throne room, only stopping outside the door to address the guards.

"By any chance did you see my sister come by?" She asked curiously.

After being informed that no, Celestia had not left the throne room, a mischievous smile began to spread across her lips. She thanked the Guards and began making her way towards the dining room--where her so-far absent sister no doubt waited for her.

"Getting cocky, aren't we Tia?" An amused whicker escaped the Lunar Princess as her smile morphed into a grin. As soon as she opened the door, something was going to happen--Celestia thought Luna would be easy to prank, so much so that she made it blatantly obvious it was going to happen.

Now, this may seem like a leap in logic to some, but this wouldn't be the first time Celestia had done something like this. A few weeks after Luna was purified by the Elements of Harmony, Celestia informer her that she was going to be pranked during her shower. Believing her sister's prank was to make her shower wrought with paranoia, Luna walked out of the bathroom with a brand new pink coat.

A few days ago, Celestia gave Tiberius--or Tibbles, as Luna affectionately called the little possum--a letter that told her that she wasn't feeling well, and wouldn't be coming to breakfast after raising the sun. When Luna woke up, she had a mustache and manacle doodled on her face with a post-it note stuck to her mirror that said "feeling much better now =)".

And that was only two examples. Needless to say, Luna wasn't going to risk actually opening the door lest something fall on her head. Instead, the mare gathered her magic into her still throbbing form and, with a burst of light, reappeared on the other side.

"Hah! I will not be fooled this time Tia! You--oh, she's not here..." Not yet satisfied that she was safe, Luna cast a quick spell across the room to make sure her sister wasn't hiding somewhere. Oddly enough, she got an incredibly faint trace of the older mare somewhere... behind her? Odd... just to be sure, Luna's tail swatted at the air behind her rump--just in case Celestia cast an invisibility spell--only for it to strike air instead of pony.

"Did she do something to my magic?" She muttered, cautiously making her way over to the table while trying to figure out what Celestia's plan was. If she was responsible for the influx of magic, than that would be a very low blow indeed. Still, after reaching the table without any incident, Luna sat down on her cushion and--

immediately deadpanned as the seat began to sink with a long, drawn out farting sound ripping from beneath her.

The prank shortcut, and one of the oldest, simplest tricks in the book; Celestia replaced Luna's seat with a whoopee-cushion, and to add insult to injury the mare wasn't even there to enjoy it.

"Very well, Sister. If that's how you want to play this out..."

Luna knew exactly how to get back at her sister; it wasn't the most ingenious plan, but than neither was a whoopee-cushion. After blowing the false cushion back up, Luna swapped it with Celestia's seat and, with a mischievous smirk and a quick, mild-pain inducing invisibility spell, Luna snuck into the palace kitchen with the sole intent to find the cake that was inevitably going to be served as Celestia's desert.

The smirk only grew once she found it. With small pop, a tube of toothpaste appeared next to the Alicorn and with glee more suitable for a foal than a princess, she began to decorate the baked good with her minty vengeance. Once done, she returned to her seat and began eating her breakfast, patiently waiting for her sister to arrive.

After ten minutes, Luna's patience was beginning to wear thin. Five more, and impatience began to give way to worry. Where was she? Being late was one thing, but not showing up at all? That wasn't like Tia.

And just like that, ten minutes became twenty, and Luna's worry drove her to begin searching the castle for her wayward sister. Much to her annoyance, the itch she had earlier felt like it was slowly crawling back up from her depths--she was too concerned for her sister to wonder about the source of the itch, and after making sure nopony was around to see it, she once more plunged her magic into her hole; this time making sure to go as deep as possible to--hopefully--keep the itch from returning.

Satisfied that the offending irritation would no longer bother her, Luna walked to one of the Castle Balconies and--with a flap of her wings--launched herself into the nighttime air. Searching the castle would take to long, and after casting a few cantrips to make sure the pain in her horn was truly gone, she began to cast a sensory spell across the Castle as she flew from one part of the grounds to another--if Celestia was still on the castle grounds, Luna would find her.