It was late in the afternoon with only a few hours left before sunset and Fluttershy had to make a delivery to one of her most closes friends, Rarity. Rarity was in her house/store making another dress as she normally does before she puts on a welcoming smile for Fluttershy and Opalescence, who's riding on her back.
"Fluttershy, there you are! I was starting to worry if Opalescence was causing a problem" Rarity elucidated
Fluttershy lowers herself to the ground for Opal to hop off "Sorry for the wait. We were going to leave soon when Parappa met up with Opal and-"
"Oh no, don't tell me my poor sweet Opal had to run away from him!"
Fluttershy shook her head "No, he had to run away from her."
Rarity gasped and was about scold Opal (to think she could even tame that little devil) but a knock at the door broke Rarity's attempt at lecturing.
"Miss Rarity? You in here?" a grey Pegasi with a blond mane at the door called out "I got a letter for you."
"Oh thank you dear" Rarity responded and uses her magic to levitate the letter over to her.
The mail-mare was about to leave when one of her eyes caught sight of another Pegasus in the room "Hey Fluttershy, thanks for watching over my pet chameleon the other day."
Fluttershy looks at her "It was no problem at all. Waldo was very well behaved." She knew this pony very well, in fact, almost everypony knew this pony very well. Her name is Ditsy "Derpy" Doo and she is one of the town's mail carriers. She's a nice pony and she tries to do her best in everything, but unfortunately messes up in the end and it shows in her work.
"Derpy" Rarity says softly with a hint of rage "when did you get this letter?"
The mail-mare didn't seem to catch the fury behind those words "Yesterday."
"ReAlLy!" her calm demeanor cracking "who DID yoU gEt It frOM?"
"The janitor, he said he found the letter on the floor near the station I work at. I guess I drop it and didn't notice, silly mistake."
"Silly mistake? SILLY MISTAKE?!?!?!" Rarity glares at Derpy "IT IS THE. WORST. MISTAKE. YOU COULD HAVE EVER DONE!"
Derpy hightailed it outta there before Rarity could do anything to her, leaving only Fluttershy to deal with the enraged mare "Whats wrong Rarity?"
"Hoity Toity" Rarity began "he wants me to make a new dress design and has given me two weeks to make it. Sadly, because of some 'silly mistake', he's expecting a design by tomorrow and I have none on hoof."
"I'm sorry about that Rarity. I wish I could help."
"That's sweet of you dear, but I don't think there's an- wait! There is something you could do!" Fluttershy cocked her head "I could use your input on making a design!"
Fluttershy started to quiver at the thought "I don't know anything about designing dresses."
"Don't sell yourself short dear" Rarity reassured her. "You know a lot about what makes a good dress, do you remember what you told me you thought about your dress for the gala?" Fluttershy tried to remember, but was too flustered to recall "If I recall, you said" *inhales* "The armscye's tight, the middy collar doesn't go with the shawl lapel, the hems are clearly machine-stitched, the pleats are uneven, the fabric looks like toile, you used a backstitch here when it clearly called for a topstitch or maybe a traditional blanket stitch, and the overdesign is reminiscent of prêt-à-porter and not true French haute couture." *pauses* "I still have no idea what this 'French' thing is."
Fluttershy was blushing at the thought that she said that, she couldn't imagine herself making such a comment.
Rarity saw Fluttershy fumbling around in her mind so she tried to give her a path to follow "Honey this isn't as hard as you might think. If you can handle Opalescence then I believe this should be water under the bridge."
Fluttershy's mind did clear from that statement, mostly because of one word 'believe'. "She's right, this is nothing to worry about. I gotta believe!"
When, it comes up at, making a new dress.
~Make one that you'll gladly wear.
I, know that it will be, a true success.
~One that is meant for a mare.
Pick, a piece of cloth, for us to work at.
~Choose one that has a fine flare.
Maybe, we'll have time, to create up a hat.
~That will make up a great pair.
View, how it will be, the dress we'll perceive.
~It'll be beyond all compare.
It, shall be done soon, before Luna's eve.
~We're ready so let us dare.
Why, don't we try and use this thread.
~It makes the dress look quite rare.
No, why don't we use this instead.
Though, it seems to me, its off gear.
~Something I just can't declare.
Got any ideas, Flutter dear?
As I view, and take a look.
I think that, maybe a brook.
~Just right about there.
And right here, move up the sleeve.
At least that's, what I believe.
YES, I see it now, it's all become so clear.
~It will make it look so fair.
Though, for a moment, I was caught up in fear.
~It gave me quite a good scare.
Its, was something I, would have never guess.
~But now that I am aware.
Quick, lets send it now, on the pony express.
~There's not much time for us to spare.
Rarity and Fluttershy were able to deliver the letter just as the post office was closing. A few days later, they got a response from Hoity Toity saying that he loved the dress idea.
"See, what did I tell you" Rarity said, praising Fluttershy on her choice "you always had a fashion sense." Fluttershy started to rub her legs from embarrassment by the praise "Oh, wait! I just remembered, hold there a second." Rarity left the room and came back with the dress that the two designed in its finished form. "I would like you to have the first dress" Rarity said, leaving Fluttershy speechless from the wonderful gift she is given and the beautiful dress she helped create.