A DAY AT THE BRONY CONVENTION

I cannot allow them to take control.

...

My name is Stephen Nicholas Dirth.

I am not a busty teenage girl. I am a man.

I am not an anthropomorphic pony. I am a human being.

Uneasily calm, I took stock of myself in the mirror. The changes had come to a halt. The nanobots had again altered my wardrobe, which now consisted solely of a red sports bra and matching black gym shorts. My tail – God, I'm never going to get over how weird it is to have to say something like that... – pierced a tight hole near the upper band of my tight-fitting, feminine gym shorts, while my wings presently retracted discreetly into big, feathery inverted teardrops on my back, folding neatly over the thin, red straps of my bra. My bigger breasts fit snugly in the boob-hugging contour of its spandex cups.

I looked at the tag: DD cup. Yeesh. My boobs were now officially "big" – at least by popular standards.

I sighed and bounced a bit on my barefoot heels (my shoes, it seems, had dissolved entirely during my agonizing transformation into a brony's wet dream), watching my boobs jiggle a little in the mirror before being quickly restrained by their spandex harness. They really aren't that big. I could easily run with these – comfortably, even, if I can get used to those overexcited nerve-endings in my nipples – as long as I have this sports bra on, anyway...

Then again, pressing my open palm flatly against my left tit, my tiny fingers barely managed to grasp its flattened circumference. It felt hefty and full in my hand. I was certainly not flat. I released the boob and turned to the side. My breasts slope out roundly from my chest like perky, overgrown grapefruits. I'd certainly arrived within the realm of "busty" – but only just.

I flapped my wings in curiosity, utilizing muscles which mere minutes ago I would have never thought could possibly have existed. Spreading them to their full wingspan of 5 feet, I began to beat the air furiously, hopping slightly in hopes of attaining some semblance of flight.

Nothin'. They're useless.

At least they look kinda cute, I guess...

Rotating my hips and turning around, I looked over my ass in the mirror. It looked meatier than it had only moments ago... my hips seemed a bit wider as well. My muscles, previously nigh-nonexistent, felt toned and fit. My thighs felt tight and powerful. The barest suggestion of a thigh gap lingered just below my crotch, neatly framed by my now-even-wider hips. Standing in a full profile, my toned buttocks pooched out invitingly from my backside, the gentle curvature of my pretty frame clearly tracing the gentle suggestion of an hourglass figure, my tight butt perfectly counterpointing my trim waist and modestly busty chest.

Experimentally, I flick my new horselike tail, wagging my tight little booty, flexing some pelvic floor muscles that I'm not entirely certain existed before. My tail swishes from side to side, snapping like a technicolor blur at the air. Between this thing and my useless wings, I've got a lot of flexibility potential for expressive movement, at the very least!

– Yessir, that's a fiiiiiine tail you've got there, for sure! You're certain to get lots of male attention with that thing...! (oh, and that other tail is nice too, I s'pose... you know... the one with the rainbows...!)

I've got find a way to change back. Now.

Even if I end up stuck as a girl forever, I can at least become fully human again!

– Become human again? At a brony convention?? You've seen yourself, right?? The second those nerds lay eyes on you their imaginations will go mad with wild pony-lust. You'll be lucky if you don't turn into a into a full-on no-shit 100% all-fours horse with crotchtits!!

All I have to do is escape this damned convention & go hang out with some normal people! I'll be normal again in no time! ...right...?

– Ha! Good luck...

Walking briskly towards the bathroom door, the anthropomorphic embodiment of Rainbow Dash stands up to her rational fear of the public eye, boldly pushing open the knobless door with a free shoulder, inadvertently bunching up her tits into an bulging, indiscriminate fatty mass as she leans in.

Stepping out into the convention hall, her perky boobs jiggle gently back into place.

Gawd, I hate these things already...

I break into a light trot. My DD cup sports bra secures my chest from wobbling excessively, but they're still bouncing up & down in time with every footstep. Nearly every head is turning. I begin to feel uneasy. My body is still within a refractory period, so no physical transformations are taking place; however, I begin to feel a subtle blur between my own mind & the minds of the pony-fans surrounding me. Not one of them wants me to leave.

Though my powerful legs could easily run for hours no problem, I slow to a stop.

...

Where am I going again?

A young teenager, maybe 14 years old, dressed in her own little custom Rainbow Dash outfit, approaches me.

– Excuse me, M-ma'am, but – that's a really amazing Rainbow Dash cosplay!! I've never seen anything like it before!! C-can I take a picture with you??

I'm taken slightly aback. Me?? No one has ever asked me to pose with them in a con photo!

She reaches up into my long, striped, rainbow mane.

– Wow!! Did you really dye your actual hair like this? That's amazing!! You're so dedicated! Did you make your costume yourself?

There's no way in hell I'm telling her the truth.

– Sure did!

– What's your name??

My name? I forget...

– Uh... Rainbow Dash! Fastest wings in Ponyville, if not all of Equestria!!

As I boast, my wings flutter confidently, and I whip my tail.

– Wow!!! How did you do that??

She begins to play gently with my wings and my tail, fascinated by their "craftsmanship."

I arch my back and puff up my chest, assuming a pose of mock-bravado.

– Hehe, trade secret, kid!! You just gotta work hard at your costume game, you know what I mean? It took me a long time to get this good, you know...!

Was that a convincing Rainbow Dash impression?

Yeesh, I hope she doesn't ask about the blue fur...

– Hehehehe, you're funny...!

The younger teen rustles around in her purse for her phone, handing it to a passing con staff member to take the photo.

We pose.

– Ok, now say, "20% cooler in 10 seconds flat!!!"

I bite my lip.

The phone's camera clicks.

We're both pretty satisfied with the result...!

– Hey, uh, "Rainbow," what's your IG? We should follow each other!!

– Huh?

– Your Instagram? You're a professional cosplayer... right? Surely you have an Instagram...?

– Well, you see, uh... actually... I don't...? I'm not really a professional cosplayer yet, I just, uh... do this for the fun! ... And for my friends!

– WHAT?? No way!! You could EASILY make a living creating costumes like this for other people, or heck – you're gorgeous! I figured you were a professional cosplayer at least – if not a 100% professional model. With your figure and your talent, you could absolutely kill it!!

She looks me in the eyes.

– A talented person like you NEEDS to be posting on Instagram. Or some kind of social media! The world needs to see how amazing you are. Where's your phone?

I root around in my gym shorts. Sure enough, my smartphone is still in there somehow. I hand it over to her.

– Ok, just gimme a sec... I'll download the app, get you set up... Instagram is such a great platform, if you get really popular – like I know you can! – you can use it as a really amazing business & marketing tool...! Hm...

– Business? Marketing?? I don't know anything about that kinda stuff! That's Rarity's thing. Rainbow Dash just likes to go fast...!

I do a little spin on one leg, flexing my wings to achieve an inhuman degree of acrobatic balance, and assume a "We can do it!" type of "girl power" pose.

She giggles tolerantly at my dorky Dash impersonation.

– Surely you're gonna do more cosplays than just Rainbow Dash...? What kind of cosplays have you done in the past? Do you have any pics?

– Er... actually, um, dressing up as Rainbow Dash is actually my very first cosplay!

She stares in disbelief at my unbelievably lifelike "costume." Her mouth is agape.

– Wow... if that's... if that's really your very first cosplay... and you made it... then you REALLY have A LOT of potential! You got so much potential! With your abilities, and your amazing body, you could revolutionize the cosplay industry!!!

Suddenly, realizing that she has been fangirling excessively, her face reddens. She places her hands behind her back and shifts her weight from foot to foot, looking down at her phone, swaying from side to side, trying to hide her embarrassment.

– All I'm trying to say is... I'm eager to see you develop as an artist.

She looks up. She's looking me straight in the eye.

– That's really why I want you to start an IG. I want to watch you grow.

She's looking down at her phone again.

– Ok, so, what do you want your username to be?

I wrack my brain.

– I don't know... how about "@growingpony7"...?

I smile.

Her face beams.

– Promise me you'll take lots & lots of beautiful pics today...! I'll follow you right now...