Today was the day. The sky was clear of any clouds, which made it perfect for tonight's meeting. Twilight sighed happily and walked down the sidewalk, heading over to her friend's house. She was wearing a t-shirt that had the solar system mapped out on it, as well as a violet mini skirt with star designs across it. Underneath that, she wore some dark indigo shorts. The nerdy girl also sported her usual ponytail.

Twilight was feeling extra confident today, since she knew what was planned for later. Pretty soon she arrived at Rarity's house, approaching it and knocking on the door. After a couple minutes, she was met with the fashionista, who appeared to be ready as well.

"Oh my, you look absolutely wonderful!" The purple haired girl beamed.

Twilight blushed at the compliment. "Thanks, I decided to try on something a little bit different than what I normally where." She told her, brushing her hands across her mini skirt.

"You look good yourself." The science girl returned the compliment.

"Oh, this? It's nothing." Rarity exaggerated, trying to hold back a light blush herself, which was more difficult due to her white skin. Her clothes were similar to her camping outfit when they went to Camp Everfree and the shorts she wore highlighted her rear even more than the last pair. "So, when will they be driving by?"

"Any minute now." Twilight answered as she checked her watch.

The nerdy girl bounced a tiny bit on her soles from the excitement. Looking across the street, as well as left and right, she turned back to her friend.

"Hey, do these shorts make my butt look big?" She asked, turning her back and lifting the back of her mini skirt up, revealing her dark purple shorts, which hugged the science girl's rear end nicely.

"Quite." Rarity nodded, smiling.

"Thanks!" Twilight beamed.

"No problem! Actually, I picked out this pair myself because they highlight my lovely derriere." Rarity placed a hand on one of her cheeks, feeling it through the shorts she wore. However, she quickly removed it, remembering she was still in public.

"Hm, it seems to be a little bit late today. Normally it arrives right around this…." Before Twilight could finish, the faint sound of a bus engine was heard approaching a corner. The two girls looked over to their left, and saw the bus turning around the corner, and heading down their street. "Huh, shouldn't have spoken so soon."

The bus got closer, and driver instantly spotted her and made sure to stop right next to her.

"Well, I suppose that is our cue." Rarity observed.

"Looks like…" Sci-Twi added with a gulp.

Rarity noticed the sudden change in tune with her friend. "Don't worry darling, it's going to be alright. I'm right here with you." The fashionista placed a hand on her friend's shoulder reassuringly.

Twilight breathed in a deep breath, before exhaling. "Thanks…" She smiled back, before the two of them stepped onto the bus.

Inside, they found two rows of nothing but empty seats. Rarity was a little taken aback by the sight.

"Wow, I don't think I've ever seen a bus this empty before."

"Yeah… I'm normally alone, which means I usually get the whole bus to myself. Which I don't mind." Twilight grinned, heading down the aisle, while looking for the best seats for the two of them.

"So, where should we sit?" Rarity asked, not used to being provided with so many options on a bus.

"Well, I was thinking somewhere the driver can't really notice us, yet an area where we'll get a good advantage of carrying out the plan." The nerdy girl responded.

"I don't think that driver will notice us. I mean, he's already busy on the road." Rarity told her friend, peeking behind her and seeing the driver simply looking at himself in the side mirror.

"Yeah, you're probably right, which is good. I'm just trying to be extra precautious." Twilight said.

"Good idea." Her fashion loving friend agreed.

"So, I'm guessing somewhere around the back will be our best bet, as well as give us a good advantage." Twilight stated, looking back at her friend.

"That sounds like a good plan to me." Rarity agreed, before they both resumed down the lane. They each took a seat next to each other one seat up from the very back.

"Ooh, I just thought of something." Rarity said, trying to keep her voice at a moderate level.

"What? What is it?" Twilight asked. Rarity quickly started to whisper in Twilight's ear and her eyes widen when she hears it. "Ooh!"

The two of them broke into a fit of giggles, while the bus just started to move again.

"So, how exactly should we do it?" Rarity asked, nudging Twi's shoulder.

"You mean the mooning?" Twi asked, which her friend nodded to.

"Do we do it against the side windows, or the back windows? Or maybe even both?" The purple haired girl wondered.

"Hmm." Twilight thought about it, switching her gaze from the window to the back. She suddenly snapped her fingers. "I got it. We can press our butts on the side windows, then once we are past them, we switch to the back to moon them even more."

The science girl tried to hold in her excitement, letting it out in short bursts of giggles.

"Ooh, Excellent!" Rarity grinned.

"I know this is wrong….but yet, it feels so good." Twilight said, rubbing her hands together like a mad scientist, while smirking mischievously.

"I know, right?" The fashionista grinned.

Twilight wiggled in her seat with excitement, biting her lip while looking out the bus window.

"How long is the drive normally?" Rarity inquired.

"A little over half an hour. I'll tell you when we're about to pass them." Twilight said, winking at her friend.

"Excellent." Rarity nodded, equally excited.

While the bus slowly trudged along, occasionally stopping at red lights, the only thing the two girls could think about was the naughty act they were gonna pull.

"Well, now we're gonna see what Rainbow felt when she mooned those Timberwolves." Twilight snickered, getting a little giggle from her friend.

"Oh definitely." Rarity stated, still smirking devilishly.

"I wonder what Rainbow would say while doing this." Twilight inquired.

"Probably something along the lines of, 'kiss my big blue butt!'." Rarity said, before the two of them busted out laughing.

"Yeah. she probably would!" Twilight admitted as they continued laughing. Luckily, the bus driver either didn't seem to hear them, or just simply didn't care. Soon, the bus was out of town and was now starting to drive uphill.

"Alright, we should see them up this hill soon." Twilight said, looking out the window.

"Gotcha." Rarity replied, looking out the window as well.

Just then, while Twilight looked out the window, she noticed something coming up ahead of them. "Hey! I see them!"

"Then I suppose it's time then." Rarity declared.

"Right!" The spectacle wearing girl nodded.

The two felt their hearts began to race, the reality of what they were about to do hitting them. However, both of them were not planning to back down now, not after they came this far.

"Let's do this!" Rarity declared, smirking as she reached down and started unbuttoning her shorts. Twilight nodded, giggling while she pulled down the zipper to her violet mini skirt, as well as unbuttoned her shorts she was wearing underneath.

Once the two of them finished unbuttoning/unzipping their shorts/skirts, they looked out the window and saw them getting closer to the protesters. Some of them carried picket signs saying slogans such as, "Space is for suckers!" and "The moon is a hoax!".

However, instead of being angry, the two girls only snickered, both knowing full well what was about to take place.

"Almost there." Rarity grinned, getting on her knees and turning around, so that her covered rear end faced the window.

Twilight felt her heart pounding excitedly as she did the unthinkable. Her legs wobbled while she climbed up on her seat and rested on her knees. Next, the science loving girl turned around, so that her skirted backside was facing towards the window, just like Rarity's.

The fashionista inserted her thumbs beneath the waistband of her shorts and panties, a familiar shiver running up her spine. Twilight did the same, sticking her thumbs under her mini skirt, as well as her shorts and underwear.

The two giddy girls looked over at each other for a moment, both wearing naughty smirks as the bus almost approached the protesters.

"Ready Twilight?"

"Ready as I'll ever be."

"Alright then… one…"

"Two…"

"Three!" The girls both said as they pulled their bottom clothes down, sat up a little bit and pressed their badonkadonks against the windows of the bus side by side. A familiar chill ran across both of their tushes, as the flesh from their butt cheeks flattened against the cold glass.

As the bus just started passing by them, a lot of the protesters stood silent, mouths agape at what they saw. Some of them even dropped their picket signs, while others gagged and averted their eyes. A few of their faces turned beet red in a mix of anger and humiliation, witnessing two big butts pressed right up on the windows, mooning them.

The two girls giggled while rubbing their bottoms across the windows, making squeaky sounds.

"Ooh, this feels so good." Twilight smirked.

"Right!?" Rarity beamed, looking giddy.

Twilight peeked behind her to get a look at some of the reactions. "Do you believe in the moon now?" The science girl declared victoriously, proceeding to taunt the protesters even further by rubbing her butt up and down the window.

"And now you know how I felt." Rarity remarked.

"Yeah, and you understood how Rainbow Dash felt when she did it, right?" The techie girl asked.

"Indeed." Rarity confirmed.

The fashionista snickered and looked behind her as well, relishing in the shocked and disgusted reactions she got. She wiggled her big ol booty on the glass, sending ripples across her massive butt cheeks. Her rear took up a good portion of the window, around 80% was covered by Rarity's large derriere. During the whole time, the driver didn't look back, notice or even care at all.

While Twilight's rear didn't match the size of her friend's, her's still took up a bit of the window, and also gave the protesters outside a really good look at her big purple moon as they passed them by.

Once they were far enough away from the protestors, enough that they couldn't see them anymore and vice versa they removed their rears from the window, the flesh of their tushie's stuck to the glass briefly as well before the girls pulled up their lower garments and sat down again.

"Whoo! What a rush!" Twilight expressed.

Rarity squealed with joy. "Completely! And look at what we left behind!" she said as she gestured to the windows which Twilight saw had their butt prints on them, making them both giggle.

"So big…!"

"I know!"

"Hey… that gives me an idea…"

"What?"

"Maybe we could both sit in clay, then I'd put them in a kiln and we'd be able to see just how large they are!" Twilight suggested.

"Hmm, maybe… and we could also take your measurements too." Rarity pointed out.

"Right… it's… only fair I… guess. Plus I wonder if I could measure each individual cheek too…" The science girl mused, looking back out the window, only to break into another fit of giggles when seeing her massive butt print again. "Should we clean these off, or keep them up?"

"Oh, just leave them, it'll make a nice surprise for whoever sees them next." Rarity grinned.

Twilight snickered again, nudging her friend. "If you would have told me yesterday, that we'd both be mooning a group of strangers out of a bus, I would have thought you were insane."

"I completely understand." Rarity nodded. "I would also think I was going mad if someone told me this would be my future."

"And it's like… after I did something… inappropriate… I just wanted to do even more inappropriate things!" Twilight expressed, eagerly.

"I can also relate to that very much so." The purple haired girl said.

Twilight's mind eagerly began racing with so many other naughty thoughts and ideas, filling her with even more excitement. "What to do next…?" she muttered quietly to herself.

"It's a good thing it's only us two on this bus." Rarity told her friend.

Twilight quickly snapped out of her trance and turned to Rarity. "Y-Yeah, we'd get into serious trouble if we were caught."

"You're quite right and yet… the thought of being caught… is just as thrilling!" Rarity confessed, excitedly.

"Hence the lack of panties at school." Twilight realized.

"Exactly." Rarity nodded.

"Well, when you put it that way, it does seem pretty… exhilarating." Twilight told her, imagining herself going commando. The idea sent a shiver of anxiousness and excitement throughout her body.

"Still, did you see the looks on their faces back their? Oh, absolutely priceless!" Rarity giggled, scooching closer to her friend, rubbing her seated rear up against Twilight's.

"Oh, totally. That felt sooo good." The techie replied, squishing her seated butt against Rarity's too. Both of them snickered while squishing their hips together while still sitting.

"Hmm…" Rarity muttered as she started to think.

"What's the matter?" Twilight inquired.

"Oh nothing, I was just pondering how else we could go about mooning other people." Rarity told her.

"Hehe, soooo… got any ideas?" Twilight asked, nudging her friend playfully.

"Well, right now I was just thinking about how it would feel while wearing different outfits."

"Oh?"

The fashionista giggled. "I think you wore the perfect attire for this occasion. The cute little solar system shirt, along with the star mini skirt fitted absolutely perfectly for what we just did." Rarity grinned, wiggling in her seat. The science girl blushed, giggling along with her.

"Yeah, you're right. Especially since I just gave them a full moon back there." Twilight remembered.

"We gave them a full moon, dearie." Rarity said, giving her friend another hip bump.

"Hehe, yeah…" Twilight fiddled with her fingers, while staring down at her mini skirt.

"I'm curious, how did it feel when you went commando?" The techie asked, eyes sparkling with interest.

"Well, it was certainly uncomfortable at first, butt…." The fashionista trailed off, grinning. "I got used to it pretty quickly, even getting curious enough to do all those other naughty acts I told you about earlier."

"Maybe… maybe Ishould try it sometime." Twilight said, sparking the interest of the purple haired girl sitting next to her.

"Ooh, are you being serious?" Rarity asked, smiling excitedly.

"I… I'm not quite sure yet." The spectacle wearing nerd started. "I mean, maybe."

"Why not? I mean I have already done and felt it's wonders, why shouldn't you?" Rarity offered.

"Really?" Twilight asked, surprised.

"Yes. And I can keep you covered just in case." Rarity said.

Twilight felt like her face was on fire from the idea of it. It seemed so risky, yet so incredibly thrilling. "Alright, I'll try it out. Just this once."

"Really? Oh how delightful!" Rarity exclaimed. "I can keep an eye on the driver, while you take care of things."

The science girl blushed and nodded, reaching her shaky hands down under her mini skirt, and fiddling with the zipper on her shorts. Ever so swiftly, she zipped it down, before hooking her thumbs under the waistband of her shorts and undies. Gulping, she pulled them all the way down, until nothing but her mini skirt covered her tush.

"Whoa…." Twilight mused, shuddering a little bit from the sudden breeze she felt down there. "It feels so much colder than I thought."

"Don't worry, you'll get used to that quickly." Rarity assured her as she took the clothes Twilight just took off.

"Thank you." Twilight smiled, before instinctively grabbing a hold of her skirt out of nowhere. The fashionista looked at her puzzled.

"What's the matter?"

"Oh, I just thought I felt a breeze." The techie grinned sheepishly.

"That's normal, trust me, I know." Rarity told her, winking.

Twilight giggled, rubbing her hand along her skirted rear, feeling the touch of the fabric rubbing her now bare butt. It was a unique sensation that didn't feel all that bad and actually made her start to feel wet between the knees, a very rare sensation for her that was occurring more and more lately.

Meanwhile, Rarity's gaze floated around the bus, jumping from the driver over to the shelves, then to the floor. Suddenly, her eyes widened when she spotted something.

"Ooh, hello… What do we have here?" The fashionista cooed, picking up a pair of sunglasses from the floor of the bus.

"Someone must have left those here by accident." Twilight suggested. "Does it say who they belong to?"

"Hmm, let me check." Rarity stated, looking all over for a signature of some sort. "It says they belong to…."

"Well… who's are they?" Twilight asked, rather impatiently. She leaned over to see what her friend saw, before her eyes widened as well. In bold lettering was an "L.D." followed by a lightning design.

"These are Lightning Dust's?" Twilight said, a little surprised.

"Whenever she was last here, she must have left them here by accident." Rarity said.

In just that moment, a light bulb flicked on inside both of their heads. Looking over at each other, they both wore nasty little smirks.

"Oh my, whatever shall we do with these?" Rarity inquired, looking at her reflection in the sunglasses, seeing the devilish smirk she had.

"That's a good question." Twilight nodded, grinning as well. "I mean, it's not like she must've cared about them all too much, since she just left them here carelessly."

"You're absolutely right. Why, someone could have stepped on them." Rarity stated.

"Or stole them." Sci-Twi added.

"Or if she left them on her seat, someone could've even sat on them." Rarity brought up, causing the both of them to break into a fit of giggles.

"Seems like of mean though…" Twilight realized.

"Yeah… I suppose you are right…" Rarity admitted. "I guess all these revenge plans has affected me in a most negative way…"

Twilight nodded. "It would be mean to destroy someone's belongings, even if it's someone we don't like."

"So, what do we do with them then?" Rarity asked, more serious this time.

"We could play with them until we get there." Twilight suggested.

"Yes! Excellent!" Rarity agreed as she put on the sunglasses. "Well? How do I look?

"Like an egotistical jerk." The other Twilight giggled. "Just kidding, they look nicer on you."

"Why, thank you darling. I have a tendency to do that." The fashionista giggled. "Here, you try them on." She handed the pair over to Twilight.

The nerdy girl took off her normal glasses and put on the sunglasses. "So? How do I look?" She asked

Rarity smiled. "Oh, they look fabulous on you."

"Aw, thanks." Twilight blushed, before giggling again. "Wait, watch this." The nerdy girl said, before getting on her knees once more.

Rarity was confused as Twilight bent over, lifted up her mini skirt, and placed the pair of sunglasses on top of her butt.

"Can you guess what I am?" Twilight grinned, wiggling her tush in front of Rarity.

"A smartass?" The fashionista asked, trying to suppress a giggle.

"Correct!" Sci-Twi beamed as they both laughed.

"Ooh, let me try." Rarity cooed, taking the glasses off of her friend's rear. She smirked and pulled down her shorts, sitting up a bit and turning around so that her rear faced Twilight. Looking back, she placed the sunglasses onto her massive derriere.

"Well, how does it look?" Rarity giggled, wiggling her booty and making the fat on it jiggle all over. Twilight was trying her hardest to not crack up laughing.

"I'd say it's an improvement," she admitted.

"Yes, I would have to agree." Rarity smiled.

The two of them giggled at their immature sense of humor.

"Sorry to butt in, but I'd like to ass you a question." Rarity said, causing her and Twilight to snicker again. She continued wiggling her big butt, making her butt cheeks jiggle.

"Want me to kiss it?" Twilight blurted out. After a few seconds, the nerd suddenly realized what she said, and covered her mouth, in an attempt to hide her intense blush.

"I'm sorry, could you repeat that?" Rarity inquired, quickly.

"Nothing! I said nothing." Twilight offered her friend a wide smile, clearly indicating she was nervous.

"I could have sworn you said something."

"Nope."

"Did it start with a 'k'..."

"No, you're mistaken."

"Really? I'm quite certain it started with a k."

"Nope! Not at all."

"Why, it almost sounded like you said kiss."

"Kiss? Who said kiss? I certainly didn't say kiss." Twilight was beginning to sweat.

"I think you did." Rarity stated.

"Well I didn't." Twilight insisted.

"Twilight…" Rarity began to say sternly.

"Can we have this conversation when we're not on the bus?" Twilight requested, practically begging.

"You said it yourself, Twilight. There isn't anyone else here besides the driver, and it's not like he's paying any attention to us back here." Rarity pointed out.

Twilight was soon sweating bullets nervously, thinking of another way she could try getting her friend's attention on something else. Without a second to think, the bus suddenly came to a halt. The front doors opened up, signaling their arrival at the planetarium.

"Well, we're here now." Rarity told the nerdy girl, making sure her shorts were pulled back up all the way, before getting up from her seat. Twilight gulped and stood up as well, but quickly sat back down. The fashionista took notice of this.

"What's the matter, dear?" The purple haired girl asked.

"I felt a breeze….down there." Twilight told her friend, while gripping her mini skirt tightly.

"As yes, I know that feeling well." Rarity nodded, understandingly.

"Can you….help keep me covered?" Twilight asked, sheepishly. Rarity nodded and stayed behind Twilight as they both started to walk toward the bus's exit.

Although it was incredibly rude, Rarity kept her eyes firmly planted on her friend's backside as she headed forward. She noticed how her left and right cheeks moved up and down individually while she walked. In fact, she had been so distracted, that she didn't notice Twilight stopping right in front of her.

"Oof!"

Twilight quickly turned to her. "Ooh, sorry!"

"Twilight? What's wrong? Why did you stop?" The fashionista inquired, surprised.

"Oh, sorry. I felt another breeze and kinda freaked a little bit." Twilight offered her friend a nervous grin.

"Don't worry about that, darling. Remember, I'm here to make you sure you won't be humiliated." Rarity reassured.

Twilight smiled thoughtfully in response. "Thank you."

Next Chapter: Chapter 13 Estimated time remaining: 3 Hours, 55 Minutes