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KuroMiko

By: DeliciousYurifagTears
folder +S to Z › Toaru Kagaku no Railgun
Rating: Adult +
Chapters: 4
Views: 7,603
Reviews: 4
Recommended: 0
Currently Reading: 0
Disclaimer: I do not own To Aru Kagaku no Railgun / To Aru Majutsu no Index, nor any of the characters herein. I definitely don't make any profit from this writing. This is purely a fan work for the sake of KuroMiko getting some well-deserved attention.
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Ch1: Mikoto Goes With It

Part 1: Mikoto Goes With It

Mikoto tossed and turned in her bed. After a hard day of training, she was dead tired, but the increasingly urgent dryness in her throat kept pushing her back towards consciousness. As her eyes flitted open in the pitch dark dorm room, her clouded senses were intrigued by a strange noise. It sounded like something distant splashing in shallow water. The longer she listened, the more curious she got; the sound was so fast and rhythmic, it was more like the wet smack of food being chewed. That wasn't quite right either though. It was so faint that Mikoto never would have noticed it if the dorm at this hour wasn't silent enough for her to hear a pin drop, yet in her mind it was slowly became more deafening than the roaring quiet of the air in in her ears. "Where have I heard that sound before...so familiar..." she pondered inwardly.

Shaking it off, she leaned over out of bed and reached for a water bottle she had left nearby on the floor. As she stirred, the sound abruptly stopped. Taking a long swig of water, the source of the bizarre noise finally dawned on her and she slowly turned towards her roommate's bunk. It was hard to make out in the darkness, but there was certainly the silhouette of Kuroko's figure laying still on the bed. And...in the moonlight, the glint of the girl's wide open eyes, watching her like a stalking tiger from the other end of the room. Mikoto shivered involuntarily.

"O...nee...sa...ma..." A sultry whisper resonated in the stillness.
Mikoto's brow was starting to dot with sweat. Her mind suddenly more alert, Mikoto became aware of a subtle scent in the air. It was the aroma of female musk.

"Shitshitshitshit!" Mikoto thought to herself. "Damn it Kuroko, you can't be serious!"

"ah....Onee-sama..." the sigh was louder this time, and the perverse schlick of Kuroko fingering her moistened cunt broke through the silence of the room again.
Mikoto buried her face in her palm. Why could she so easily picture in her mind's eye exactly what Kuroko was doing over there? "Eww...So awkward..." she thought.

While the Railgun was trying to decide whether to say something or just pretend to go back to sleep, she was interrupted by the sudden appearance of another presence on her bed.
"Ack!" she recoiled, knocking her pillows to the floor and spilling her water bottle all over them. "K-k-k-k-kuroko!!"

Kuroko leaned in close enough to kiss, forcing her surprised victim backwards into a position underneath her on the mattress. She began to stroke Mikoto's cheek lovingly with one hand, and as Mikoto felt the warm sogginess of some foreign liquid being smeared across her face, she realized with dread that it was the hand Kuroko had been masturbating with.

"Onee-sama, Kuroko can't take your teasing anymore. I planned so diligently and arranged for us to room together, I've done as much as I can... all so that you would look at me. I knew from the moment I saw you that I love you, Onee-sama. And now I'm going to show you how much."

Using her free hand she grasped Mikoto's wrist and held down with all her strength, pressing her body down on Mikoto's and craning her neck to nibble seductively on her Onee-sama's earlobe. Mikoto stammered and blushed, unable to muster a reaction. Kuroko's tiny breasts massaged her own through the thin fabrics of their clothes, and she twitched each time the teleporter's erect nipples brushed against hers. Kuroko had removed her hand from Mikoto's cheek, leaving her heavy musky scent behind, and was now deftly undoing the lowest buttons on Mikoto's pajama top. Biting her lip, Mikoto was too overtaken by an incomprehensible warmth spreading through her body to even try to throw her assaulter off. As the slender, silken fingers of her roomate slid over her belly, she unconsciously rubbed her thighs together, bothered by the burning feeling gathering there.

"Onee-shama, " Kuroko purred, still lightly clenching the flesh of Mikoto's ear between her teeth, "don't be afraid. Just relax and let me share this with you. It's going to feel really, really good. I promise."
With that, Kuroko pulled herself up slightly and undid the last button on Mikoto's top, throwing it open and exposing the pale flesh of her pubescent mounds. "You and your Gekotan pajamas...it's so cute, Onee-sama!" she giggled.

Mikoto tossed her head back when she felt the luxurious caress of Kuroko's charmeuse babydoll sliding across her chest, and the heated flesh once again pressed flat against her own.
"Fuck...fuck...this is wrong...what I am doing..." her mind looped over and over in between bursts of pleasure. She glimpsed Kuroko licking two fingers and then reaching down to excitedly twitter her nipples, before the shock of it sent her into a new height of ecstacy. With each pinch and flick of Kuroko's fingers, Mikoto unconsciously sent a tiny arc of electricity bolting through the air, illuminating the room with her excitement.

Kuroko smiled, pinching both of her Onee-sama's nipples fiercely and aweing at the fireworks. "Heh, you're incredible, Mikoto-Onee-sama!" she cooed. "But just wait. It gets better."
Losing control of herself, Kuroko yanked down Mikoto's bottoms with a jerk, and her eyes widened like saucers at the close-up glimpse of Mikoto's hairless mons.

"Onee-sama doesn't wear any panties when she sleeps! Oh my GOD!" Kuroko practically shouted, her jaw hanging slack with raw delight. Her Onee-sama's tight, rosy slit, unquestionably that of a virgin, glinted with a soft dew in the moonlight. Kuroko instantly backed up off of her victim and closed her face in on Mikoto's crotch. She petted Mikoto's thighs as she eyed the already-moistened mound hungrily. But she had totally forgot about keeping the upper hand over Mikoto.

"KUROKO!!" Mikoto growled. Kuroko felt the sharp smack of a knee to the face and rolled off the bed, thudding hard against the wood floor before she even knew what happened. "What...the...FUCK, Shirai!"
This time, Kuroko was pinned to the ground, as Mikoto, her face flushing a fantastic crimson, mounted her would-be rapist in a counter-assault. Her hands wrapped so firm around Kuroko's wrists that the younger girl's smirk twisted into a wince of pain. Gritting her teeth in a wild mix of anger and passion, Mikoto sent a surge of electricity coursing through the helpless girl's body, eliciting a disgustingly aroused yelp from Kuroko. Breathing hard, the dazed Kuroko stared up into Mikoto's deliciously firm A-cup breasts hanging through the open shirt about a foot over her face. Despite everything Kuroko's pussy was now overflowing with her lust. "Kuroko! Kuroko! Kuroko!" Mikoto continued to bark senselessly. Saliva flecked from her mouth onto Kuroko's face.

"KU!"
Kuroko winced at a powerful shock.
"RO!"
Another jolt.
"KO!!"
And again. Kuroko cried out so loud that the girls in the next room woke up.

Easing up, Mikoto glared down into her perverted roommate's eyes, shaking her head at the way Kuroko still managed to wear a look of contented pleasure, even though she was panting for air after her torture.
The room was frozen in pure silence for a moment as neither one of the girls said a thing. Clouds eclipsed the moon outside and a deeper darkness enveloped the room, obscuring their faces from one another. A drop of sweat fell from Mikoto's heaving chest down onto Kuroko's lips, and she licked it up greedily.

"You...you really like that, don't you?" Mikoto whispered, breaking the silence. After a second, Kuroko responded quietly.

"Yes, Onee-sama. Anything you're willing to give, it is my pleasure to take it."

Mikoto released the teleporter's sore wrists and leaned back to sit on her cowgirl-style. Kuroko smirked, she could feel her Onee-sama's balmy lubrication soaking into the fabric of her lingerie. "We're both aroused. There's no way Onee-sama can back out now..." she thought. She propped herself up on her elbows and waited for Mikoto to determine the next move in their game.

"It...it did feel good. Just like you said." Mikoto stammered in a hesitant voice. Kuroko watched in amusement as Mikoto shook her head violently and lightly slapped her own cheek to get herself together.
"BUT! I've actually...god damn it Kuroko...I've actually...thought about this before and..."

"OH MY GOD! Onee-sama, I knew it! I knew it!" Kuroko interrupted with glee, laughing victoriously.

"..and I'm not sure how two girls do it but...I think I should be the one doing that stuff. Er, what I mean is..." she cleared her throat loudly. Her next words were so bold and firm that they set even Kuroko back.
"You want it Kuroko, fine, you're gonna get it, you sick little dyke!"

With an unprecedented vigor, she flipped Kuroko over onto her back into pulled her ass up so she was in a doggy-style position. Then Mikoto hunched over her and cruelly forced Kuroko's head to the floor with one hand. With her other, she began to run the width of her palm over Kuroko's dripping slit, grimacing at the sticky feel of another girl's genitals and still not entirely sure if she was turned on or disgusted. But either way, she continued, jamming three fingers into Kuroko's hole awkwardly. Kuroko's back arched as she cringed at the unexpected intrusion. Even though Mikoto had done this to herself before, the feeling of Kuroko's velvety walls contracting against her fingers felt unreal to her, and she quickly got lost in her act, ramming her fingers in and out without mercy. She wasn't quite sure what else to do, so she pulled her hand out after a solid minute and just started exploring all over Kuroko's folds, eventually bumping her index finger sharply into a swollen little lump she recognized as Kuroko's clit. Kuroko mewed with a wild protest, pulling her hips away by reflex. Mikoto pursued, seeking the little pearl out again and pinching the thing between the breadth of her index and forefingers.

"Aaaahh! Too much Onee-sama, that's too much!" Kuroko pleaded as Mikoto curiously yanked on her clit.

Mikoto released her hold and positioned herself her prey to tentatively lick along the other girl's swollen sex. Her mind swam at the bizarre taste of Kuroko's juices, some kind of lightly tangy mixture of citrus and sweat. She jabbed her tongue a good inch into her roommate and swabbed it back and forth across the tender flesh, listening to Kuroko moan the whole time. Placing her hands on Kuroko's petite ass, Mikoto spread it a bit to bury her face deeper and continue lapping at the younger girl's snatch without any sort of form or technique. After a while, she felt Kuroko pull away and sit up on her knees.

"Hehe, I have an idea Onee-sama. Let's feel good together, okay?"

She leaned back, holding her legs open in the air and motioned for Mikoto to do the same. After she did, Kuroko scooted closer, still holding her thighs apart, and awkwardly started grappling with Mikoto's legs until she had locked the two of them together at an angle. "This is called tribadism, Onee-sama!" Kuroko exclaimed with glee. Mikoto felt the burning heat of Kuroko's open pussy grinding against her own, and despite her previous oath to be the aggressor, she laid back semi-limply and let Kuroko gyrate their conjoined hips in rythm. Her roommate clutched the meat of Mikoto's thigh and pulled her leg up a little to fix herself in the best possible angle, then ground her pelvis furiously against her Onee-sama's.

"Fuh...fuh...FUCK Kuroko, that feels so good!"

Kuroko moaned unintelligibly in response. Still grasping Mikoto's thigh, she extended her free hand and started massaging one of the Railgun's breasts with her whole palm. She continued to smash her genitals into Mikoto's violently, the two of them panting and sighing in the center of the moonlit dorm room while her pace quickened.

Mikoto gasped. "Kuroko, Kuroko, Kuroko...What is...I feel like I'm gonna!"

Kuroko felt her Onee-sama's muscles contracting against her own as Mikoto's body surged with orgasm, letting loose into the air a loud crack of lightning that branched like a neon spiderweb across the ceiling. Overwhelmed, Kuroko came hard underneath the dancing light above, her body shuddering for what felt like an eternity. At last, she fell slack and plopped over on top of Mikoto, the two of them soaked with sweat. Panting wildly, Kuroko pulled her face up to meet Mikoto's and with the last of her energy, gave her the deepest kiss she could muster. To her delight, Mikoto returned the favor. Neither of the two said a word as they lay together and swiftly drifted into sleep while the first cracks of sunlight began to inch their way through the blinds.

Mikoto was jolted awake by a knock at the door. She tried to get up, but looked down to find Kuroko asleep on top of her, her hair a tussled mess and wearing a look of angelic bliss on her face. Mikoto grinned a little, recalling the events of a few hours ago. While she was spacing out, however, the door swung open with a loud bang.
"Misaka-san! Shirai-san! I received several complaints from your neighbors last night, and now I find both of you missing from the morning class! Just what are you two deviants doing!?"
Mikoto craned her head back and, from her view, saw the nightmarish upside-down figure of the dorm mistress towering over her with her trademark poker face.
Mikoto calmly pulled her pajama top up to cover her exposed right breast. Kuroko's sleeping face was drooling over the other one.
Putting on the best innocent smile she could muster, she replied "Oh...good morning Mistress..."


To be continued...
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