Sci-Twi stared in bewilderment, a blush apparent on her face as she witnessed her friend stripping naked right in front of her. "R-Rarity! You're getting naked!? Outdoors!?" The nervous nerdy girl exclaimed with worry, afraid her friend's vulnerable state will lead to them being caught.

"That's right." Rarity confirmed, chipper. "I feel a little… exhibitionism right now."

Twilight's face was certainly a bright shade of red, as she took in the sight of her friend's bare naked body. "H-how does it feel?"

Rarity looked at her naked self and started to do several poses. "Hmm, embarrassing… but I do feel a great sense of freedom!"

Twilight gulped a little as she continued to stare at Rarity's gorgeous bare body. "I think you have a beautiful body." She stated, before covering her mouth quickly.

"Thank you." Rarity said, proudly before looking at Twilight seductively. "So… which part do you like the most?"

"Huh?" The science girl inquired, caught off-guard.

Rarity slapped both of her butt cheeks first, making the flesh ripple. "My plump fanny?"

Next she let her boobs swing back and forth like a pendulum. "Or my sizable breasts?"

Twilight's eyes followed her friend's boobs as they swung back and forth, almost like a trance. The nerdy girl shook her head, blushing intensely.

"A-as beautiful as your whole body is, I think my favorite part might be that…. Fanny." Sci-Twi gulped a little, smiling nervously at the naked fashionista.

Rarity just giggled. "Yes, I have to agree, it is my best feature. As is yours."

Twilight looked down towards hers. "Really?"

"Oh, yes." Rarity nodded as she grinned wickedly. "In fact…"

Twilight grew nervous as Rarity started to approach her, snickering mischievously. "Wha… what are you doing?"

"Just providing a little motivation."

"Motivation?"

"Yes. If you do not strip yourself, I will."

Sci-Twi gulped again and started backing up slowly. "W-wait now, let's take it a little easy." She eventually stopped when her butt made contact with the bark of a tree.

"Don't worry, I won't bite… at least not much!" Rarity snickered as she continued to approach before grabbing Sci-Twi's shirt and started to pull up her shirt.

"Ohhh, Rarity wait." Twilight groaned, but still didn't put up a fight. Instead, she watched as the alluring fashionista in front of her removed her solar system shirt completely, revealing a lavender bra beneath, which Rarity removed also. A sudden chill washed over the nerd's body as her shirt and bra were taken off, causing her to shudder.

"Oh my goodness, it's so chilly." Sci-Twi stated, crossing her arms across her breasts, pushing her boobs up as she did so.

Rarity took in the lovely sight, smirking all the while. "Good. Now, could you do me a favor next?"

"Oh? What is it?" Twilight asked, her eyes darting all around, in fear of someone looking.

"Could you turn around, bend over a bit, and slowly pull down that cute star speckled skirt?" The fashionista's naughty smirk grew. "I wanna see that glorious full moon of yours, mooning me."

Twilight quickly nodded, and after grabbing the waistband of her skirt, she very slowly pulled it down and bent over forward in the process, raising her derriere up into the air in front of Rarity, causing her eyes to light up.

"Oh! What a breathtaking moon...absolutely gorgeous!" Rarity squeaked, as she raised her hand, and soon enough... the clap came down like thunder.

WHAP!

The twin globes bounced and wobbled, dancing spryly from the firm impact of Rarity's slender digits across Twilight's poor naked tush.

"GAH!" Twilight gasped in surprise, the stinging from the sudden spank still ringing on her wobbling ass cheeks. Soon, a faint pink hand mark appeared across her two globes.

"Ooh, nice squeal there darling." Rarity complimented her, staring down at the still jiggling buttocks of her friend. "In fact… let's make you squeal more…"

"More…?" Twilight echoed, very nervously as her legs bent and trembled.

"Yes. Now… put your hands against that tree behind you and stick out your rump." Rarity ordered as she twisted a finger around. "Chop, chop, dear."

Twilight wanted to say no and put that new confidence she had to good use, but the submissive part of her was still there, not to mention the fact that she greatly enjoyed being spanked too much.

"O-ok…" Twilight stuttered, timidly before she turned to the tree and pressed her hands against it. "Like this?

Rarity giggled. "Stick your butt out a little more, please?"

Twilight then moved her butt a little closer to Rarity. "Like this?

Her friend licked her lips and smiled. "Oh, yes… just like that," she said, pleased before she suddenly smacks Sci-Twi's rear once again.

The geeky girl yelped, her poor behind wobbling under the firm blow from Rarity's fingertips. The twin cheeks bounced and jiggled against once and other. She slapped again and again, alternating her tiny fingers across Twi's two wide cheeks.

"OWW!" Twilight practically screamed from the blows her backside was taking. Although, she was secretly enjoying this quite a lot. Rarity on the other hand, was also deriving great pleasure in spanking the submissive girl, who currently had her red booty on full display in front of her.

Twilight cooed in delight, feeling the sting was over her buttocks. "Ooo, we've been so naughty today. Mooning a bunch of strangers while on the bus." The sciencey girl smirked. "Leaving a little present on the windows for the next person to notice."

"Indeed we have been." Rarity agreed as she started to smack Twilight's bottom cheeks like a pair of basketballs.

Twilight took the punishment, yelping with each unwavering smack to her poor, sore tush. "Ah! Maybe you need to be punished as well."

Rarity smirked. "You're certainly welcome to try."

Twilight grinned in response. "Is that a challenge?" The naughty nerd inquired.

"What if it is?"

"Ooh, you're asking for it!" Twilight said, turning back around to face the fashionista.

"Oh dear." Rarity responded before Sci-Twi tackled her down and started wrestling her on the ground, fully naked.

"Aha! Gotcha now!" Twilight declared atop the fashionista. Much to the nerd's surprise, Rarity easily flipped her over, quickly climbing on top of her.

"I've taken martial arts, dear." Rarity grinned smugly, while the sciencey girl struggled beneath her.

"Not fair." Twilight grumbled, adding to the amusement of her victorious friend.

Still grinning, Rarity turned around while still sitting on top of Twilight, so that her fanny faced the pinned nerd's face.

Twilight felt her cheeks flushing intensely, as Rarity's massive twin white globes jiggled inches away from her face. She knew the fashionista had a large posterior, but actually being this close to it really highlighted its size.

The fashionista looked behind her with a naughty smirk, giggling upon seeing her friend's stunned expression.

"If you'd please pardon my French for just this moment, dear." Rarity started, her smirk growing. "Kiss my ass, darling."

Twilight was stunned at first by her normally uptight friend's use of such 'uncouth' language. However, it still didn't distract her from the fact that Rarity's massive, jiggling ass cheeks were inches away from her face. With a gulp, the nerd puckered up her lips, and proceeded to lean her head forward.

Slowly, but surely, her lips got closer and closer to the fashionista's immense derriere. She was so close in fact, that she could smell some sort of lotion that was undoubtedly expensive. She also noticed tiny beads of sweat, which shifted whenever the fat of Rarity's butt cheeks rippled. Without hesitating, Twilight pressed her lips against the soft flesh of Rarity's bare, white posterior.

"Oooh." The fashionista cooed in delight, rather enjoying the feeling of someone giving her a quite literal ass kissing. Rarity bit her bottom lip in an effort to stifle a moan, meanwhile her devilish smirk still remained.

Twilight closed her eyes and even let out a moan while continuing to smooch the fashionista's jiggling ass cheeks while doing so made Rarity shiver. When Twilight was done, she had left a bright kiss mark on her friend's ass cheek, which rose up as Rarity stood up and offered Twilight her hand.

"Now then, shall we streak back home?" she offered.

The science girl shuddered in a mix of excitement and anxiety at the mere thought of the two of them heading all the way back home in nothing but their birthday suits.

"Ooh, that sounds incredibly risky… yet also very exciting!" Twilight nodded, excitedly.

"I know." Rarity beamed as Twilight took her hand before she helped her up, turned away and started running off. "Race you!"

Twilight giggled and immediately took off after her. "Hey! You got a head start!"

"So?" Rarity teased.

The nerd tried her best to keep up with the fashionista, who was surprisingly quite nimble and quick, for a girl with such a large posterior.

"Wow, she's pretty fast." Twilight thought to herself as she raced behind her friend, who was getting farther ahead of her with each step.

---

Rarity felt her heart race with excitement, and her veins rushed with adrenaline as she ran steadily ahead of her friend. She felt a certain freedom openly streaking outside like this, a type of freedom she didn't know she wanted to experience.

The movement of the extra fat on her backside bouncing up and down, along with her sizable breasts doing the same, just added even more to the fashionista's enjoyment. Not to mention the slightly cool evening air rushing against her bare body felt absolutely incredible, like being hit with little jolts of electricity all over.

"Oh, I can't deny this. This is so much fun! I love it! I love streaking!" Rarity smiled and laughed freely as she continued to run without missing a step.

Behind her, Twilight felt the exact same way but was mostly distracted by the sight of her friend's badonkadonk bouncing in front of her. She watched how the flesh on the fashionista's glutes jiggled up and down with each step she took. In fact, she was so distracted by the marvelous fanny that she didn't notice a stray branch in front of her, causing her to trip and start falling forwards.

"Whoa!" She called out, luckily stopping herself from landing face first in the dirt and her ass up in the air for the world to see.

Rarity on the other hand, just arrived right at an empty street. She decided to take a quick peek behind her before crossing it and found Twilight dusting herself off. After she waited and saw that her friend was alright, the fashionista quickly zipped across the street, stopping on the other side.

She looked behind her once again and found the nerdy girl still brushing some dirt off her legs. This lead to an idea popping in the fashionista's brain. Feeling the excitement rushing through her body, she chose to borrow a page from Rainbow.

A coy little grin formed on her lips, as she placed both her hands on her knees, and leaned her upper body forwards a bit. This caused her big, bare, derriere to jut outwards towards the street as she leaned more.

"Yoohoo!"

Twilight looked up from dusting off her legs, and blushed bright crimson.

"O-oh…" She stammered, finding none other than Rarity's enormous rear end wiggling from side to side, just on the other end of the road up ahead. The nerd's heart pounded in her chest, both from the amount of energy she had just exerted, along with the fact that her friend was currently mooning her.

"I'll… I'll be right there!" Twilight called out, panting. "Whew! Not used to so much running…"

"Need some motivation?" Rarity inquired before kissing her hand and smacking her bum with it, making the extra fat on her ass wobble.

Twilight smirked. "Classy."

"Well, I am indeed a lady of class." The fashionista giggled in response, shaking her tush at the nerdy girl on the other side of the road, who was still catching her breath before sprinting ahead.

"Hey!" Twilight exclaimed before chasing after her.

They suddenly stopped however, when they started to hear a car coming their way and quickly looked around for something to hide in before seeing a bush and jumping into it. They held each other close with bright red faces as they waited for the car to pass.

Twilight's eyes suddenly shot wide open, in a mix or nervousness and embarrassment. "Rarity! Your butt is sticking out!" She warned, noticing her friend wasn't completely obscured by the bush they were hiding in.

Rarity looked back and gasped in shock and embarrassment when she realized she was right.

"Oh dear…." The fashionista mustered in a squeaky voice. Her mind became filled with several thoughts at once, which were interrupted by the sound of a car approaching closer. "What do I do!? What do I do!?"

"Just… I don't know… press it down!" Twilight said, hushed.

Rarity quickly set her bottom down into the grass and the dirt and curled up into a tight ball while still holding to Twilight who did the same.

They waited and listened as the car drove by, at which point they both stood up, covering her breasts and butt and lifting a knee to cover their crotches.

One close call, and now the two naked girls were checking all of their surroundings frantically, nervous about any possible eyes spotting them.

"Wow, that was a very close call." Twilight said, her voice a little shaky from the incident.

"Indeed…" Rarity nodded, also very shaken. "Oh… see anyone else?"

"No… but I doubt it'll be for long…" Sci-Twi admitted.

Rarity moaned. "Maybe this was a bad idea… if we get caught in our birthday suits in public not only will people see how fat our rear ends are but…"

"We could go to jail for public nudity?" Twilight guessed.

"Among other things!" Rarity confirmed.

"Well, there's no point in standing around talking about it, where's your house?" The sciency girl asked.

"Oh, it shouldn't be too far. At least... I think it isn't too far?" Rarity stated, with uncertainty in her tone.

Twilight quirked an eyebrow, similar to how Applejack usually does. "You don't know?"

"Well, I haven't even been in this area before!" Rarity yelled out, her body trembling with adrenaline and anxiety, and her eyes darting around all over.

Twilight slowly placed a hand on her friend's shoulder comfortingly. "Look, it's okay. Just relax. Breathe slowly." She said, demonstrating by inhaling deeply, and exhaling with her eyes closed.

Rarity nodded shakily, before closing her eyes, breathing in slowly, then breathing back out. She repeated this process a few more times, until her body had stopped shaking, before looking back at Twilight, smiling.

"Thanks for that. I was getting a bit carried away right there."

"A bit?"

"Oh alright, a lot."

The two naked girls giggled together, temporarily ignoring the situation they were in, and simply finding the humor in it all.

"I wonder if anyone will find our clothes?" The sciencey girl wondered.

"Maybe, maybe not." The fashionista shrugged, before giggling again. "Would you still like to continue that race? Perhaps to my place?"

Twilight grinned, her playful side arising again. "Oh, you're on!"

Without a second to waste, both streaking girls quickly started off once more, running with each other through the little wooded area on the side of the road, avoiding bushes and trees they come across.

Next Chapter: Chapter 15 Estimated time remaining: 3 Hours, 39 Minutes