It was the cadet's birthday, and there wasn't much left to do in the night. They had gone to a concert, played video games, and even though Rainbow wasn't exactly 'nimble' in the kitchen, they had managed, to enjoy a delightful home cooked dinner. Surprisingly enough, the night was going extremely well. They had managed to get out of kitchen duty though some favors Dash had pulled. They got

the last two tickets left for the big DJ Pon3 concert. The music was amazing, and on the way out of the stadium, they found a twenty bits, just lying on the ground.

Rainbow gave a relaxed grin, , leaning back to soak in the view of Lightning, who had insisted that she put the dishes away even if it was her birthday. She had aqua fur and a bright yellow, off yellow mane cut. They'd joined the academy together, and now...well...now Lightning Dust was a pony Dash couldn't live without. They were partners in everything, and they thrived on adventure.

" Yo Rainbow ?" The cadet looked up, tilting her head curiously. Lightning was staring at her, having long since put the dishes into the sink. Both cadets living on the base, neither of them had anywhere nearby to crash, but Lightning's friend, 'Surprise' had a little place near by, which she had offered them for the night.

"Yeah?"

"You were staring into space."

"Heh. Sorry. I guess I was just thinking..."

"Did it hurt?"

"Har har."

"Well, it's starting to get late. Maybe we should start thinking about cleaning up." The pegasus quipped, to which Rainbow nodded her head. Together, they rose from their spots, and headed into the living room, where a plethora of personal belongings cluttered the floor. Lightning bent down, beginning to collect her things, while Rainbow busily gathered up their jackets.

"We really need to find a way to thank Surprise for letting us borrow her apartment for the night." Lightning mused while reaching for an empty soda bottle. Rainbow chuckled, and nodded her head.

"Yeah, well, I just wanted to have a place to cook something...I think I'm getting better." She said with a wide smile and perked ears.

Lightning grinned and stood up, nodding her head appreciatively.

"Yeah you are. Soon you'll be just like Emerald-BAM!" The cadet chuckled, giving Rainbow a firm punch in the arm. Dash yelped, stumbling backwards and landing with an "Ooof!" onto the couch, and was quickly followed by Lightning on top of her, chuckling softly. Rainbow grinned, and squirmed, reaching a hoof out of the tangle of arms and legs and grabbed at her jacket.

"Ooooh, Hey, Lightning, I've got something for you."

"For me?"

"Yeah...it's just... Ya know..."Dash smiled sheepishly and reached into her jacket, producing a small white package; a decorated box, white paper with red wrapping. Lightning grinned, rattling the box near her ear.

"What is it?" She asked with an eager grin. The Pegasus underneath her squirmed a bit and shook her head,

snickering quietly.

"Just open it." She quipped, but her voice was drowned out by the sound of ripping paper and torn ribbon, followed by a gasp.

"Dash, what the hell?!" Lightning yelped. Rainbow giggled. In Lighting's hooves was a package of panties0 bright white with Rainbow Dash's cutie mark all over them. Compliments of Rarity. While Lightning Dust looked bemused, Rainbow caught sight of a slight blush forming across her nose and grinned.

"How modest. Like I want anything to do with you on my butt. "She snorted. Rainbow gave a quiet grasp and stuck her tongue out. "

"Please, I'm the coolest thing that would ever touch your butt. Anyway, I didn't know your size so I guessed. ...I hope they fit. Um...try them on?" Rainbow asked, a soft red tint of a blush starting to form over her muzzle. A similar stripe appeared across Lightning's muzzle and the little aqua pegasus bit her lip.

"Geez. For you and ONLY for you, you perv. But we shouldn't stay here much longer...how about the dorm rooms?" she asked. Rainbow

quickly agreed.

* * *

"Well what do you think?" Lightning asked sheepishly a full on blush over her face as she stood, entirely bare save the underwear, in the

middle of the tiny room, while Rainbow sat on the bed, the tip of her tail flickering happily as Lightning modeled off the custom undies.

"I like them!" Rainbow said almost instantly, who was sitting with her legs crossed and her tail by her side. She'd stripped down to just her undershirt, and a pair of panties herself, and grinned a sly grin at Lightning Dust. Lightning rolled her eyes, crossing her arms.

"You would. They're a size too small. " The girl grumbled, and indeed they were. The panties fit snug around Lightning's hips, outlining her curves and a clinging helplessly to her rear in the back. No matter how hard she tried, it was impossible to get the fabric up high enough to cover up the embarrassing 'Y" of the cleft under her tail.

Rainbow blushed a little deeper and shrugged her shoulders helplessly. "Sorry Lightning...I'll take them back if you want me too..."

"Shut up, Dashie. I'm just saying you've got crappy taste in sizes....or very good tastes, You perv." Lightning chuckled. Rainbow blushed a little harder and giggled along with her, nodding her head.

Soooo Dusty. There's also one last present I gotta give." Rainbow grinned wickedly. Lighting frowned. She knew that tone of Rainbow's voice...

"Yeah...whats that??" Lightning asked, ears flattening a little as an edge of caution filled her voice. Regardless of her reflexes and nimble agility gained for years of flight, Lightning completely failed to avoid Rainbow 's grasping hoof, fingers wrapping around the girl's wrist, pulling her down onto Rainbow's lap.

"H, hey! Dash! Leggo! Get offa me!"Dusty snarled. Rainbow only grinned, holding tightly onto Lighting as she squirmed in her lap. One hoof rested on the small of Lighting's back, while the other rested gently along the plump, firm curve of the girl's upturned rear end.

"Sorry, but rules are rules, and it's yer birthday..." Dash hissed.

"Birthday spankings." Lightning said with an amused grin. Rainbow quickly nodded and the pegasus giggled, giving her rump the cutest little wiggle Rainbow had ever seen.

"Well...go on, get them over with." Lightning grinned. She had expected Rainbow to say something before the first swat landed, but that wasn't the case at all, the surprise of the blow causing the girl to jump in Rainbow 's lap. The cadet just giggled quietly. The firm kiss of Rainbow 's fingers weren't hard at all, playful would be the best word to describe it. The second blow landed a hoof squarely across Lightning's firm right cheek, followed by another blow to the left aqua cheek. The fourth blow landed across both cheeks of the panty covered rump, forcing a surprised yelp from the girl's other end.

"Hehehe, Happy birthday, Dust. Give up, yet??"

"...Give up?? Harder you pussy!!"

Lightning snapped. Rainbow needed no further encouragement. The fifth, sixth and seventh blow smacked across Lightning's right cheek, and the eighth, ninth, and tenth, all landed perfectly across her left cheek. flooding the room with firm cracks and swats, now that Lightning had teased Rainbow into it.

"That's ten." Rainbow chuckled, , looking down at the girl, squirming across her knees. Lightning blinked, her ears perking, and her face twisting in confusion.

"Aren't you supposed to go to twenty?" "She asked curiously with a gentle wriggle of her rear. Rainbow rolled her eyes.

"I don't think you can handle twenty."

"Bitch please! "Lightning snorted. Rainbow grinned- Exactly what she was hoping for. Rainbow nodded, drumming her fingers gently along the rounded swell of Lightning's backside.

"Ok, but for the last ten..."Rainbow paused for a moment, letting her voice trail off. Lightning didn't need to ask, instead she only shivered when she felt the cool breeze of the room kiss the freshly bared cheeks of her rear. The rainbow panties hanging around her thighs. she blushed faintly, squirming under the gaze of Rainbow dash, who had a perfect view of her unprotected bare bottom.

"Eleven!" Rainbow cried out in an obviously pleased voice Lightning Dust shivered, her blush still resting comfortably on her cheeks as the blow echoed through the room. She wished Rainbow wouldn't' take her sweet time with this. It was almost unbearably embarrassing, and Lightning was almost positive that Rainbow could smell the birthday "surprise" her actions were causing. Rainbow paused, staring down at the twin globes of Lightning that she dominated. This was the closet she had even been to the Lightning's backside and she never really had a chance to observe the way she did now. The cheeks were perfect, rounded, firm yet, plump. The perfect bubble butt- like ripe grapefruit, so to speak. She trailed a finger delicately along the adorable divide that separated the twin globes, forcing a squirm out of the girl below her.

"D-Dashie...come on That- that...feels funny..." Lighting mumbled, only to gasp in surprise when the next hit struck!

"Twelve!" Rainbow barked, landing a swat across Lightning's behind with the force of a cadet who was starting to go overboard. Lightning bit her lower lip, shivering under Rainbow 's hooves and the sensations that came along with it. Rainbow giggled quietly to herself. She had to savior this ,make it last as long as possible. Thirteen smacked across both cheeks, forcing a most delightful jiggle from Lightning's rear end. Both cheeks bouncing and trembling, like some foreign dance done only for the watching blue pegasus. Rainbow 's heart skipped a beat. Fourteen, fiftieth and sixteen, all landing on Lightning''s right cheek, and seventeen, eighteen, and nineteen, all landed on Lightning's left cheek. By twenty, both of them were panting equally hard...

"TWENTY!" Rainbow barked, landing the blow squarely across Lightning's bottom, forcing a yelp out of the girl- it was the hardest Rainbow had chosen to hit yet. There was a slight pause now. They were done. There weren't any more smacks to be had, yet neither of them moved. The naked girl shivered a bit, looking back at Rainbow over her shoulder with a quiet smile.

"Well...is that all?"

"AND ONE TO GROW ON!!" Rainbow giggled, landing one last slap across Lightning's behind, forcing Lightning to bounce on Rainbow 's lap. The two of them giggled quietly for a moment, before Rainbow let Lightning sit up, the two of them tumbling back onto the bed in a playful embrace.

"Mmm, you need to wait until your birthday bitch." Lightning whispered gently. Rainbow rolled her eyes- but nodded her

head.

"Well it's almost midnight...now what?"

"Well...now my ass hurts. And it's still my birthday, so get to rubbing!"

"hehehe...alright...alright.. " Seconds later, Lightning was treated to the wonderful, familiar sensation of hooves rubbing her bare behind. She shivered, a quiet moan of ecstasy slipped past her lips and she closed her eyes, her ears perking slightly to the gentle words that trickled from the her best friend behind her.

"Happy Birthday Lightning."

Author's Note

I posted this months and months ago, but some one made some comments about my dreadful grammar, and I got self conscious and pulled it down. It's not -that- great of a story, and it got a buncha negative votes. I admittedly, had written this a long time ago about another couple, then never posted it, and then translated it into Rainbow Dash and Lightning Dust, because I liked it that way much better, but over all, eh. -.- not that great. I gave up on it.