My Breast Friend

"Eight...nine...ten!"

Rainbow Dash finished stretching and got ready to take off on her run. After days of waiting, the rain clouds that had kept her inside had cleared to allow the sun to shine today, and all that remained was a cool blowing breeze that shook the trees and cooled the sun's heat. In other words, it was the perfect day to go outside for a run, and Rainbow would not let it slip by. In preparation, she wore a blue shirt with her old school's logo, a pair of shorts, and her favorite pair of running shoes.

Running had always been a favorite pastime for the athlete. It made Rainbow Dash forget about the world around her and all her problems; it was her release. It reminded her of when she was just a squirt, running laps around all the boys in the neighborhood that dared challenge her. The pride Rainbow got from seeing their defeated glares still hadn't faded. Every time she went for a run, she gave it 120% to make herself the world's fastest and most perfect runner.

Smiling, she cracked her neck to the side and back again and prepared to take off. She almost lost her balance when a voice behind her caught her off guard.

"Rainbow Dash, wait!" When she turned, she saw her pink friend running out of the door toward her. She had tied her long curly pink hair into two buns and was wearing a white crop top that tightly hugged her enormous rack. Traveling down, she saw her friend had chosen to wear a pink pair of shorts that weren't too dissimilar to Rainbow's, although instead of showing sleek muscles, they showed a set of pink thighs and a shapely butt.

"P-Pinkie Pie? What are you...you know I'm just going for a run, right?" Rainbow stuttered out, trying to resist Pinkie's curvy body's gravitational force on her eyes.

"I know, but I wanted to join you!"

"Wha-Why?"

"Because I like spending time with you, silly."

"We...won't exactly be talking. I'll be trying to run as fast as possible, and, um, I'm not sure you can keep up." Rainbow chose her words carefully to sound cool while also trying not to be mean to Pinkie.

"I can still try!" she cheered. "Plus, I think I have been getting a little chunky lately. A workout could be good for me."

Rainbow didn't respond, but she knew she was far from obese. Compared to Rainbow, who was a twig and didn't have much in the front or back to show off, Pinkie was quite a bit bigger. However, Pinkie was bigger in all the right places and had plenty to show off, and Rainbow was always attracted to girls who had more to show off.

"I guess that settles it!" Pinkie decided after getting no response from Rainbow. "Oh, should we act like we're in a race together? That'd be fun!"

Rainbow smirked and crossed her arms. "I don't know," she smirked, "You know you're going to lose, right?"

"We'll see about that, Dashie," Pinkie smiled, walking up to her and getting into a bent-over starting track position. Rainbow saw her crop top slip a bit, and she noted with a blush that the party girl had chosen to wear a contrasting black bra along with it.

"O-okay," she stammered, getting into position as well. Although she didn't go downward dog like Pinkie, she bent her knees and set her arms to propel herself forward. "Ready?"

"Mhm," Pinkie nodded.

"Go!"

Rainbow Dash had decided to run her usual route, about three miles long. It started by going up a steep hill for the first stretch, and from there, it was a quick jaunt to the nearby city park. She would run around the entire perimeter of the park, maybe stopping for a drink at the fountain near the end, and then go back down the hill and back to the apartment.

At first, it was a tough course for Rainbow to handle. Even with her training and slick physique, it was still daunting to go up such a steep hill and then continue. It was one of those hills that cyclists stopped at and chose to walk their bikes up unless they were exceedingly skilled. It went on for about half a mile and had no breaks in between, making it tough for just about anyone to scale without stopping. Although it was tough, it helped Rainbow with incline training and keeping her stamina up. Plus, once she got up, she could focus more on speed since there was no longer any climbing.

It was clear that her roommate was not used to it yet, though.

When they started, Pinkie Pie tried to run fast to keep pace with Rainbow, but as her legs met the hill, they seemed to struggle to propel her up the incline. Not even halfway up, Rainbow stopped to let the girl catch up to her. She was surprised that Pinkie was already panting hard, but she still looked determined not to give up. This time, Rainbow moved at a jogging pace so the party girl could keep up with her, but even at the slower pace, her roommate still fell far behind. It took three stoppages before the two girls were at the top of the hill.

"You alright?" Rainbow asked after Pinkie slowly jogged to her. The pink girl had put her hands on her legs and her head down, trying desperately to catch her breath.

"Yeah...Rainbow...of course...I am..." she gasped.

"Hey, if you want to turn around and go back, it's all downhill back."

"No...I'm alright." She stood straight up and wiped the sweat off her brow. Rainbow turned red and looked away. Something about seeing Pinkie Pie all sweaty was really attractive to her, and it became more so when she turned back around and saw Pinkie hiking up her shirt and her boobs jiggling around inside.

She cleared her throat. "Alright, let's keep going then."

"Okie dokie," Pinkie exclaimed.

They continued across the street and toward the park. The two girls could see that they weren't the only ones who decided to enjoy the perfect day. There were some middle-aged people playing tennis on the courts, a bunch of teenage boys playing an intense game of basketball, and many children running around the playground while their parents watched them.

Rainbow found herself going much slower as she circled the park. It wasn't because she was tired or hurt but because she didn't want Pinkie to fall too far behind. Rainbow checked behind her occasionally to ensure she was still keeping pace, at least somewhat, but it seemed like no matter how much she adjusted, Pinkie would still be falling behind.

Rainbow felt thirsty after running around the big park, and she figured Pinkie would appreciate the opportunity to take a break. By now, the athletic girl had lost track of how many times she had to stop for her friend, and now she was starting to feel embarrassed for her.

She got off the trail and ran toward a pavilion with a drinking fountain under its roof. She bent over and pressed the metal button on the fountain. When the cold water hit her lips, she instantly felt a recharge. It felt like ice was being put in her veins, cooling off the rest of her body and giving her energy to power through the rest of the run.

"Nice job, Dashie," she heard Pinkie's voice behind her.

Suddenly, without warning, she felt something slap against her butt. Shocked, she spit out the water in her mouth and started hacking. After clearing her airways, she turned around.

"P-Pinkie? What...did you just-"

"I thought you'd like it!"

"W-W-What?" Rainbow asked, beat red.

Pinkie nodded. "You and your sports buddies do it all the time, so I thought you'd like it if I did it, too! Since I think you did a super terrific job!"

Rainbow shook her head, trying to clear her thoughts. "Oh, well...I mean...you did...never mind. Uh, Y-You did alright too, Pinks."

Without thinking, Rainbow gave Pinkie a quick slap on her buttcheek in return, who giggled sweetly. It was a lot less hard than Pinkie's gesture, but Rainbow didn't want to hurt her. Plus, now she had officially touched her roommate's soft butt, and she seemed to like it, so that was a positive. Suddenly lost in thoughts, the athlete wondered if Pinkie would like it better if she hit her harder like the pink girl did to her.

It was then that Rainbow realized just how kinky she was.

"Thank you! I liked running with you, even though I was behind you the whole time."

Rainbow couldn't help but wonder if Pinkie had been staring at her butt the whole time.

"Anyway, could you please scootch over so I can have a drink, please?"

Rainbow realized she had been standing in front of the fountain, completely fazed out in her sexual thoughts.

"Whoops, sorry."

As Pinkie stepped past her, she looked the opposite way toward the playground, trying to clear her thoughts. She was watching a trio of boys throwing a football around when she heard a snap right next to her.

"Uh oh," Pinkie she heard Pinkie say.

"What's wrong?"

"I think my bra got unhooked."

Rainbow turned her head to look at Pinkie. The pink girl was still bent over, holding her breasts. Rainbow felt her face heat up instantly.

"O-oh," Rainbow mumbled, unsure of how to respond to the situation.

"Can you please help me?" Pinkie asked sweetly.

"How?"

"Just reach under my shirt and hook the straps together."

Rainbow Dash nervously looked around the area. Even though no one had noticed the situation yet, they were in plain view of the playground, and Rainbow knew that they wouldn't want their children to see a fully grown woman reaching into another one's shirt.

"Fine, but can we go over there?" Rainbow asked, pointing around the brick wall of the pavilion they were standing under. Pinkie nodded and followed her friend, still trying to hold her bra in place. Meanwhile, Rainbow was taking deep breaths to prepare for what she was about to do.

The other side of the wall was still in plain sight, but luckily for them, there was no one to witness what was about to happen. Once both girls were ready, Pinkie turned around and bent her back a little. Rainbow slowly tucked one hand under Pinkie's white crop top and grasped onto her loose bra strap. She then used her other and found her other bra strap quickly, trying not to think about what she was doing. That wasn't easy, with Pinkie wiggling around and giggling.

"Stop! That tickles!"

"Do you want me to help you or not?" Rainbow asked. Even though it came out sharper than she wanted, she wasn't angry at Pinkie but embarrassed that someone would see them.

"S-sorry, Dashie. I'll t-try to be less ticklish."

Rainbow furiously blushed as she thought about how she was essentially helping Pinkie get dressed like a little girl, except she had certain parts that a little girl wouldn't have.

Already knowing that the bra was probably a tight fit for Pinkie, Rainbow carefully stretched the bands so they wouldn't hurt her busty friend. She could still hear Pinkie breathing heavily, trying not to laugh, which made her roll her eyes as she tried to get the bands around her back. She crossed the straps in the back and tried to clasp them together. However, when she got them lined up, she realized they wouldn't hook together. She desperately tried to work quickly to stop the awkward moment but couldn't do it. Rainbow then realized that she could see the problem clearly, and it made her face even hotter than before.

"Everything alrighty?" she heard Pinkie ask.

"Uh, P-Pinks?" she spat. "Y-Y-Your, um...bra broke."

Pinkie's eyes widened. "Oh no! Did it really?"

Rainbow nodded, still unwilling to make eye contact. "Yeah, the hooks are shot. There's no fixing this."

"Well, that's okay," Pinkie smiled, "I've been meaning to go bra shopping anyway."

"Is...that so?"

"Anyway, are you ready to keep going?" she asked innocently.

Rainbow turned her head to meet Pinkie's eyes for the first time in what felt like forever. "How are you going to get back with no bra?"

"Easy," Pinkie said. "Uh, could you please let go?"

Rainbow realized she had forgotten to let go of Pinkie's bra. She had been too busy rubbing the cotton on the elastic between her fingers. She let go of the underwear and left the two bands hanging outside Pinkie's shirt and down by her butt.

She saw her friend let go of her ample chest, reach under her shirt, and pull her bra out from under it. Rainbow marveled at how big the cups were when compared to hers. While her bras looked like two pieces of leftover fabric attached to two bands, Pinkie's looked like it was made with a purpose. The soft and round cups stuck out and indicated a much fuller bust that needed plenty of support.

Pinkie then tucked her shirt in to wrap around her boobs to keep them in tightly. Rainbow's eyes immediately fell on the nipples poking through her shirt, now with no bra to cover them. Her friend walked over to a nearby trash and threw the garment away.

"Pinkie, what are you doing?"

She giggled. " I can't wear it anymore, silly, it's broken. Now let's go! I'm all ready!"

"...How are y-you even supposed to r-run like that?" Even though she didn't have massive tits, Rainbow could only imagine how much it would hurt to run without support.

"I just move my legs."

"I..." Rainbow was about to argue but then realized who she was talking to. "Nevermind. Are you ready?"

"Yeppers," Pinkie exclaimed.

"Alright, let's get going," Rainbow said as she began to jog again with her friend behind her. Rainbow tried to clear her head and focus on running, but the temptation of looking back was almost too much for her.

Rainbow's face lit up again when she looked behind her again.

She wasn't sure if it was because Pinkie was still winded from before or because she had a new obstacle to deal with because now she was moving even slower. Rainbow had to keep looking over her shoulder to make sure she wasn't outrunning the other girl. Each time she did, she would see Pinkie's massive rack wobbling back and forth and up and down with each stride she took. Because she was wearing a crop top, Rainbow wasn't sure if she would lose a tit from the top or the bottom because it seemed like either one was certainly possible at this point.

As they ran back home, Rainbow felt paranoid that people were looking at her friend. She could've sworn a car had slowed down to take a peak, and those two men sitting at the restaurant were probably talking about her. She didn't want people to think of her crush like an object because, to her, she was much more than that, more than meets the eye.

But even she found it hard to resist the temptation of Pinkie's headlights.

When they got to the hill, Rainbow decided it was easy for her roommate to go down by herself at her own pace. She didn't want Pinkie to try and stress herself, so she decided that it would be best if she went faster so Pinkie wouldn't bother trying to keep up. Rainbow felt her pace quicken as soon as she started downhill. The cool wind brushed by her face, cooling her off and taking the beads of sweat off her face as she descended further and further down. It was why she liked this part the best. It was a nice little reward after the rigorous run.

Rainbow stopped when she reached the bottom of the hill, just across the street from her apartment building. She put her hands on her head to keep her chest open so she could breathe easier, a trick she had learned from an old soccer coach. After a few seconds of deep breathing, she turned to see how far behind Pinkie was.

Although Pinkie obviously had not managed to keep up, Rainbow could see that Pinkie was jogging at a plodding pace, and she also saw why running without a bra was a bad idea. Pinkie's boobs were bouncing even more inside of her top now that she was going down a hill. When they bounced up, it looked like they were more in than out. When they bounced down, Rainbow thought they would spill out the bottom.

When she finally got to the bottom of the hill next to Rainbow, she bent over and put her hands on her knees, giving Rainbow Dash an amazing view of her cleavage as her boobs hung down. She felt her face heat up even more when she saw far enough down to see the top of her friend's nipples.

She turned away and tried to focus on something else before she got too excited or seemed like a pervert. "You know," she mumbled, "i-if you put your hands on your head, it opens up your tits- I MEAN CHEST...s-so that you'll be able to, um, breathe...easier."

Rainbow cursed herself for the mistake and having breasts on her mind, but Pinkie didn't seem to notice as she put her hands on her head and panted desperately to catch her breath. Now her shirt hugged her chest tight so that her nipples were poking out very clearly again. Rainbow was amazed at how round and perky her tits were, even without a bra. Perky was the only thing she may have been able to brag about her own breasts, but even Pinkie had that going for her. Rainbow felt a familiar ting of jealousy thinking about how perfect Pinkie's boobs really were, but also a longing to be intimate with them.

"T-thanks...Dashie...whew!" Pinkie brushed a bead of sweat off her eyebrow. "Is it hot out here, or is it just me?"

"Oh, it's definitely just you," Rainbow said from the cuff.

The busty girl smiled, "Well, thank you for letting me come with you! Even though I had a little accident, I had lots of fun!"

Rainbow thought about how she almost had a little accident herself, but didn't want to mention it to Pinkie. Instead, she asked the question she had been thinking about since they were at the park. They were both girls, after all, so she thought it wouldn't be weird to ask casually.

"Is it uncomfortable?"

"Hm?"

"Uh, i-is it uncomfortable...running without a bra?"

Pinkie turned her head to the side. "Shouldn't you know?"

Rainbow caught a bit of angst at the last statement. Her boobs may have been small, but she still ran with a sports bra to support herself and reduce injury. "I meant for you. D-did it hurt running today?"

"Not really," Pinkie shrugged, surprising Rainbow with her response. "I mean, it's less comfortable to run with my boobies swinging around, but they don't hurt me that much. I guess I'll just have to wear a stronger bra next time."

"Next time?" Rainbow questioned.

"Of course! I want to do this again with you! You're my best friend, and I want to hang with you as much as possible!"

"Thanks, Pinkie. Your my breast fri- BEST FRIEND, TOO."

"Aww, you're so sweet," Pinkie replied, again missing her friend's slip-up. "And, hey, maybe next time you'll even beat me!"

"Yeah...wait, what do you mean?"

Before Rainbow could react, she saw the pink girl burst at a full sprint toward the front door of their building. Rainbow realized what Pinkie was trying to do and tried to follow, but although Rainbow was clearly faster, Pinkie had just enough of a head start to beat her friend.

"Whoo!" she cheered, jumping up and down. "I can't believe it! I beat the old track team captain at a race! I must be the fastest girl alive!"

Rainbow tried to ignore how her puppies bounced while jumping up, but it got a little hard when Pinkie began approaching her.

"I told you I'd beat ya!" Pinkie beamed, wrapping an arm around Rainbow.

Rainbow's expression morphed into an awkward smile, and she chuckled. "Yep, you sure did."

"Oh my gosh, I need to tell everyone about this! This is so exciting!" The party girl then ran through the building doors, being held open for her by a very confused passerby.

Rainbow Dash just sighed and followed her inside the building, ready to take an extremely cold shower.