Author's Notes:

I don't own A Certain Scientific Railgun or any of its characters, no copyright is intended.

Italics - Means the person is thinking, just so you know.

Rating for chapter: M (for mature content)

Paring: Mikoto x Kuroko

Warning: This contains yuri (girl x girl) parings. Don't like, don't read simple, otherwise enjoy :D

WARNING: This contains lemon ;P

...

Today had been a hard and tiresome day for Kuroko Shirai, she had had some homework to finish off for school, Judgement had been bothering her a little with this new case that no one has found any leads on just yet unfortunately, not only that but she also had been meaning to go out shopping for some new clothes that she needed, but with everything that's been going on lately, she just hasn't gotten the chance to go just yet.

The young Teleporter sighed deeply as it was now late in the evening, as she was researching a few things on her laptop while her roommate had just come out of the shower and was getting ready for bed.

"What's up Kuroko?" she heard the older teen calling to her, as she took her attention away from the screen for a moment.

"Huh, oh nothing really Sissy, just Judgement work as all," Kuroko gave the older girl a small smile as she turned to look to her, while the Railgun sat up on her bed, looking a little concerned for her roommate.

"You're not going to be up all night with it are you?" Mikoto asked as she got up from her bed and walked over to the desk that her roommate was sitting at, leaning against it a little.

"No I think I'll just give it up for tonight, I'm tired anyway," Kuroko sighed again as she just shrugged her shoulders and shut down her laptop and closed it, looked to her roommate again, as she watched the older girl walk back over to her bed and sit down on it again.

"Hey Kuroko, can I…ask you something?" the Railgun asked, her voice taking a slight nervous tone to it.

"Sure, what is it Sissy?" Kuroko turned round in her seat, while she looked to her roommate with a wondering expression on her face.

"Well I was just wondering…" Mikoto paused, as she looked like she was blushing a little and turned away from Kuroko, before she shook her head and looked back to the younger girl again,

"What does sex feel like?" her voice came out in a whispered tone, as she nervously looked to the younger girl.

Kuroko didn't answer as she just sat speechless, and looked to Mikoto with wide eyes, seeming all too surprised by the older girl's strange and out of the blue question, 'She didn't just say what I thought she said right? No of course not I must of heard her wrong, or maybe I'm dreaming, yeah that's it I must have fallen asleep while researching, there's no way Sissy would ask me something like that in real life,' the young Teleporter thought as she blinked a few times, before she slapped herself in the face, hoping to wake herself up, only to end up winching at the pain she felt afterwards.

"Are you okay Kuroko?" Mikoto asked, wondering why the younger girl had just slapped herself in the face like that all of a sudden.

"Yeah, fine…sorry what did you say Sissy?" Kuroko asked as she rubbed her slapped cheek and sighed a little at finding out that she was in fact not dreaming right now, so that must have meant she had heard her wrong.

"I said, 'what does sex feel like'?" Mikoto repeated her question, talking a little more loudly and clearer now as she seemed a little less nervous.

It turns out that Kuroko hadn't heard her wrong as she sat wide-eyed, and took a moment to think about what was going on right now, 'Okay so I didn't hear her wrong or anything like that, but why did she suddenly ask something like that?' she wondered as she stood up from her seat and walked over to her own bed.

"Where is this coming from Sissy, are you sick or something?" the Teleporter asked as she sat down on her bed and looked to the older girl with a puzzled expression now, still seeming to be caught off guard a little by this certain question.

"No I'm fine, it's just that…Saten was talking to me about the subject earlier today, and I really just didn't know how to answer her or anything. I'm older than her and yet I know next to nothing about that kind of stuff," Mikoto explained sighing slightly, while she looked down to the floor and seemed disappointed in herself.

"So then way are you asking me about it? You're a year older than me as well don't forget,"

"I know, but you seem to always know so much about the topic that I thought you had already done it or something," Mikoto stated nervously, she knew that even though Kuroko was only in her early teens and was a year younger than herself, she guessed she had already done it with someone before, since she always seemed to know a lot about the subject, not to mention the weird and often times erotic fantasies and dreams she would have and sometimes brag to her and the other two about.

"Sissy just because I know a lot about the subject, doesn't mean I'm not still a virgin,"

"Wait…are you still a virgin?"

Kuroko just smiled as she sat forward on her bed and looked deep into the older girl's brown eyes, "Of course Sissy, after all I've been saving myself for you," she winked to her roommate, causing Mikoto to cringe a little and turn away from the Teleporter.

"That's exactly what I mean though, I should know more than you and Saten do, but it turns out that I'm completely hopeless when it comes to this sort of thing. I mean I know how a baby is made and all that stuff but…I guess since I've never done myself I don't fully understand it that well," Mikoto explained, changing the subject to what they were originally talking about.

"But Sissy haven't you ever thought about it?" Kuroko asked as she now seemed much more interested then shocked and speechless.

"Not really, I guess I've never given it all that much thought,"

"Really Sissy, you've never thought of someone in that way before, haven't you ever had a crush on someone before?"

"No, I've never really bothered with any of that stuff, of course there was the odd guy that I maybe liked, but I always just ignored the weird feelings I would get, and after a few days they would go away like they had never been there in the first place," Mikoto slouched on her bed a little as she tried to think of a time she had maybe had feelings for someone, but none really came to mind, none of them being like how Kuroko seemed to feel about her at least.

"So you've never been in love before?" Kuroko asked as she stood up from her bed.

Mikoto just shook her head after thinking for a few minutes, as she shrugged her shoulders and let Kuroko come and sit down beside her on her bed.

"And you've never had your first kiss?" Kuroko rested a hand on her roommate's shoulder, now beginning to understand why something like this had been bothering the older girl.

"Have you?" Mikoto felt a little embarrassed now, as it seemed like she had been missing out on quite a few things since she had come to this city and had only really focused on things like school and levelling up more than anything else.

Kuroko looked to Mikoto for a moment, before she just smiled and nodded to her, "Yes a couple of years back, she was a nice girl, but not really my type I guess, we weren't together that long,"

Mikoto was a little surprised, not that Kuroko had already kissed someone before, or dated them, but more to the fact that she couldn't really believe that someone else could put up with an full-on and sometimes forceful girl like Kuroko, 'Then again that might have been why they didn't go out for that long.' She thought with a slight smile, before she looked to Kuroko, feeling a little nervous again.

"Kuroko?"

"Hmm?"

"What does a…kiss feel like?" Mikoto couldn't help but blush a little when having to ask her roommate things like this, it made her uncomfortable, but she felt like she just had to know.

"Well I suppose I could tell you, but you have to promise me that you won't shock me okay?" Kuroko smiled as she moved a little closer to the Railgun, as she saw an opportunity and decided to go right for it, without even having to think twice about it.

Mikoto was a little weary at first, wondering why she would shock her if she was just telling her how it felt, but shrugged and agreed to it anyway, nodding slightly, "Okay I promise I won't shock you,"

"Good girl," Kuroko smiled to the older girl, before she leaned in closer to her and surprised her with a light kiss on the lips.

Mikoto froze as she was all too surprised by the soft feeling of Kuroko's lips brushing against her own, only letting the light kiss last a few seconds, before she broke it and pulled away from her roommate, and glared to her.

"Kuroko," the Railgun spoke in an angered tone, getting ready to give the Teleporter a good shock, before the younger girl nervously smiled to her and held her by her shoulders, trying to keep her somewhat calm.

"Hey you promised you wouldn't shock me,"

"That was because you said you were going to tell me, not show me," Mikoto glared to her roommate, while her voice had an annoyed tone to it, feeling like she should just shock Kuroko and not care about breaking the promise she had just made to her.

"But Sissy isn't that what you wanted?" Kuroko smirked now as she let go of the older girl's shoulders and cupped her cheek, stroking it lightly.

"What are you talking about?" Mikoto frowned to Kuroko as she brushed her hand away from her face.

"You said you wanted me to tell you how a kiss feels, so wouldn't the more effective way of doing that, be showing you instead?"

Mikoto still frowned a little as she did want to know how a kiss felt, but she really didn't know if she should let Kuroko kiss her like this, after all would she stop at just a kiss, or would she turn it into something more?

"Come on Sissy, don't you want to know what a real kiss feels like?" Kuroko spoke in quite the lustful tone, causing Mikoto to shiver and feel even more uncomfortable as she felt Kuroko cup her cheek again, and traced her lips with her thumb ever so softly.

'It's just a kiss right? That's it, nothing more, we never need to speak of this again once it's over. Come on Mikoto Misaka you shouldn't be feeling so nervous about this, it's just one simple kiss, who cares if it's Kuroko, she's my roommate and probably my closest friend, but it's not like this will change anything between us. After all she's tried to kiss me a hundred times before, the only difference is I'm actually letting her do it this time I guess, then again if she takes it too far I could just pull away again, and besides what have I really got to lose by doing this?' Mikoto thought to herself as she could feel her cheeks heating up and swallowed slowly, while she looked to Kuroko and sighed deeply, convincing herself that a single kiss is all this would be, just so she could see what it felt like, then that would be the end of it.

"Okay…" the Railgun answered with a slight nod to her roommate, finally agreeing to let Kuroko kiss her just this once, "But you can't tell anyone about this alright?" she warned knowing how bad it may look if this somehow got out.

"Don't worry Sissy, I won't tell a single soul," Kuroko smiled with a nod, before she cupped the older girl's cheeks with both hands and leaned in closer to her again, sending a few shivers down Mikoto's spine as the Railgun could feel the younger girl's warm breath on her lips.

Mikoto's brown eyes went wide for a while as she felt Kuroko's lips brush against her's again, being soft at first, but soon feeling a little pressure as Kuroko deepened the kiss slightly. Mikoto let herself slowly get used to the feeling of someone else's lips on her own, she had kissed her family before but this somehow felt completely different to that, as she now sat with her eyes half open, and her hands clenched into tight fists, uncertain if this felt good or bad.

She glanced to Kuroko, and watched for a reaction from her. Her eyes were closed, but she could easily tell that she was more than happy right now, after all why wouldn't she be? She had probably always wanted to kiss her dear 'Sissy' and now she was actually letting her do it, she was probably over the moon about it no doubt.

Mikoto pulled away slightly, as she nervously turned away from Kuroko and blushed deeply, tracing her lips with two fingers, while her head felt like it was spinning, and her heart was beating a little faster.

Kuroko looked to her roommate with a smile, guessing that she had gotten nervous again, and decided to see if she would let her go a little further, she wasn't herself right now, she was vulnerable and maybe a little confused, does that mean she would be willing to try something more than just light kissing?

"Hey Sissy, open your mouth for me," Kuroko spoke in a whispered voice, while that lustful tone could still be heard by the older girl.

"What, why?" Mikoto looked back to Kuroko, nervously as she wasn't exactly sure if she liked where this was going or not.

"Trust me, you'll like it," Kuroko winked to Mikoto as she stroked her cheek a little and rested her other hand on her shoulder, looking deep into her brown eyes again.

The Railgun hesitated at first, not sure if she should trust Kuroko's words, before she took a deep breath and slowly closed her eyes, parting her lips a little as she felt the younger girl's lips press against her's again.

A slight surprised gasp could be heard from Mikoto's lips as she felt Kuroko push her tongue in and begin to explore her walls, playing around with the older girl's tongue and encouraging it to join her's,

'Her…her tongue…is she trying to French kiss me? I…I…I'm not sure if I ever like this…it feels weird. Should I just tell her to stop?' Mikoto wondered as she really wasn't sure if this was going the way it was supposed to, she knew that Kuroko was enjoying it no doubt, but she wasn't so sure about herself, after all not only was this the first time she had done something like this with someone, but that someone was also Kuroko, her best friend and roommate, was it okay to do these sorts of things, there wasn't any harm in it right?

Although this was pretty much all that Kuroko had ever dreamed about, she could tell that Mikoto wasn't enjoying it as much. She smiled into the kiss, and decided to be a little more forceful, deepening the kiss even more, while she ran her hand through her roommate's short hair.

'She's…sucking on my tongue…why is my mind going blank…I can't breathe, what's happening to me,' Mikoto gasped for breath between kisses, as tears started to slowly well up in her eyes, she had never felt like this before, it felt so weird, but also was slowly starting to feel kind of…nice.

As the deep kiss grew more passionate and went on for longer, Mikoto had no idea how to react to what was going on, her heart was pounding in her chest, her head was spinning, her mind had now gone completely blank, and as she could feel her breath running short, her lungs begging for air, a very faint, but very clear enough moan of slight pleasure escaped her throat.

Their lips parted slowly as one single string on saliva connected them still. Kuroko smiled to Mikoto, clearly she had heard that small moan at the end, while the Railgun just sat there, blushing deeply and breathing heavily, getting her breath back, before she looked back to Kuroko and could feel some sort of urge to try that kiss again.

The Railgun sighed a little as she pulled away from Kuroko and touched her lips with two fingers, still tasting the younger girl's lips on her own, she bit her bottom lip slightly, as she knew that the kiss started to feel…really good towards the end there, should she try it again to see if it feels the same? This was Kuroko after all, she would be fine with it, but she was a little scared to admit that she actually did like that kiss more than she first thought she would.

"What's wrong Sissy, didn't you like it? Do you maybe want to try again?" Kuroko asked, looking a little concerned as she saw that the older girl looked to be awfully confused at the moment.

"No, no it felt good I guess…it's just…" Mikoto paused as she thought, trying to put her thoughts into words, but unfortunately her head was still spinning, and right now she didn't seem to have any way to focus her mind on anything, while her heart raced and her chest felt tight, all she could do was look to her roommate with a confused expression,

'What is this feeling…why can't I focus on anything? My head hurts, my chest aches, my tongue feeling tingly, and slight trembles are constantly going down my spine right now. Is this what kissing someone feels like? If this is all from a simple kiss…how would going all the way make me feel? Would it feel this good as well?' Mikoto thought before she moved closer to Kuroko and leaned into her more, laying a light kiss on her lips, before she looked to the younger girl with a longing look in her eyes.

Kuroko wasn't sure what Mikoto was going to say next as at this moment she still seemed to be in that vulnerable state, not only that be it seemed to have gotten even worse now. Plus as Kuroko looked into the older girl's eyes she could see something which she had never seen before behind them, 'Could she possibly want me to do more to her?' Kuroko questioned, before she felt Mikoto kiss her cheek lightly and blushed a little, wondering just what it was that her roommate wanted her to do next.

"Hey, Kuroko?" Mikoto leaned in closer again.

"Yes…Sissy?" Kuroko asked nervously as she shivered at feeling the elder girl's breath on her exposed neck, while Mikoto seemed to move closer with every word that she said.

"How do two girls have sex?" the Railgun whispered into Kuroko's ear, before she linked both of her arms around the younger girl's neck and gazed into her eyes with that same longing look in her own, she was clearly asking for Kuroko to carry on.

Kuroko eyes widened as she could not believe what she had just heard her roommate say to her. It was already quite the miracle that she had let her kiss her twice a minute ago, but to actually let her make love to her? Now she could have never ever imagined that. Still she quickly composed herself and smiled to her roommate, after all when would she ever get another chance like this, all her dreams were finally coming true, and she couldn't be happier about it.

"Are you sure about this Sissy?" Kuroko asked as she reached a hand up to Mikoto's cheek and stroked it lightly, combing her hand through her short hair, and taking her small hair clip out in the process.

Mikoto just nodded in reply. She had never done anything like this before, and she wasn't sure if it would change how she felt about Kuroko or not, but all she wanted to know was, how did it all feel, was it all as good as that kiss, or was that the only good part, she would only know if she tried it out for herself.

"So then do you want me to simply tell you how it all works, or…" Kuroko paused as she wrapped her arms around Mikoto's waist and pulled her closer to her chest, kissing her cheek lightly, before she whispered into her ear, "…do you want me to show you instead?"

Kuroko just smiled as she saw Mikoto's blush deepen at that, before she leaned into her again and blew into her ear, causing the older girl to shiver slightly.

"Sh…show me," Mikoto answered after a pause, whispering while she was still blushing nervously, trembling slightly as she felt Kuroko lift up her pyjama top a little and softly caress her exposed skin.

Kuroko nodded happily, before she hugged Mikoto close to her, while the Railgun sighed and brought her into another deep kiss, not caring if any moans escaped her throat this time as Kuroko was soon sucking on her tongue again.

'This feels different to the other kiss, this one feels more comfortable, and much more enjoyable…it feels so nice…to have her lips on mine, and to feel her tongue twisting and turning along with mine. I can hear her moans and gasps slowly starting to match with mine, this feels so amazing, I never knew something like kissing could feel this good,' Mikoto thought, getting well and truly lost in the deep, and passionate kiss, while the taste of Kuroko lips on her's made her tongue tingle, trembling at the soft touches she could feel going up her exposed back every now and again caused by the younger girl's hands.

Once there lips parted, Kuroko smiled to the older girl sitting in her arms, before she nuzzled into her neck, causing Mikoto to give out a small chuckle. Kuroko slowly let go of her roommate, moving to get up from the bed and stood in front of Mikoto, while the older girl just looked back to her with a wondering expression, a little puzzled as to why she had stopped and gotten off of the bed suddenly.

"Well Sissy, normally what comes after kissing, is undressing so…" Kuroko trailed off slightly as she lifted her purple pyjama top up a little, and smiled when the older girl looked to her now exposed navel and slim stomach, before she looked back up to Kuroko's eyes, and watched her strip down to her underwear, while she blushed deeply.

'I've seen her in only her panties and even completely naked plenty of times before…but why does it now feel so different to see her like this? I never noticed how child-like her body looks, her chest is smaller than mine, and she definitely doesn't have any curves on her…and yet her slender body looks so inviting right now, like its simply screaming for my attention.' Mikoto swallowed loudly as she couldn't help but bite her lip when she looked to her roommate's almost completely naked body,

'Her twintails are out right now…I've seen her with her hair down plenty of times before now, but right now I can see how long her hair really is, and I think I like it more when it's down like this…plus she looks…really cute with her hair down,' Mikoto thought with a small smile, before she pulled herself out of her thoughts and heard Kuroko say something.

"Like what you see Sissy?" Kuroko smirked at the longing look that was in Mikoto's eyes, while a deep blush stained the older girl's cheeks, "Your turn,"

Mikoto looked down to her pyjamas for a minute, blushing nervously while she fiddled with the collar to her pyjama top a little, turning away from Kuroko slightly, 'Why am I so nervous? I've undressed in front of Kuroko lots of times before, I shouldn't feel any different about now,' she thought as she shook off that nervous feeling and sighed, before she slowly unbuttoned her pyjama top and slipped it off of her shoulders, pausing as she looked down to her pyjama pants now.

"You know I could take them off for you if you can't do it Sissy," Kuroko smiled as she winked to the struggling Railgun, causing her look back to her, while her blush deepened, and she shook her head frantically.

"I can undress myself thank you very much," Mikoto stated as she glared to Kuroko slightly, before she looked back to her pyjama pants, quickly taking them off a second later and dropping them onto the floor.

Kuroko smiled as she came to sit back onto Mikoto's bed, allowing her to link her arms back around her neck, while she traced small circles on the Railgun's back with one finger on each hand, chuckling slightly when she would see the older girl shiver against her light touches.

"Okay, but if we're really going to do this, you've got to promise me you won't shock me for anything, got it?" Kuroko asked, not wanting to be shocked every time she did something to the powerful Railgun.

"But what if I don't like what you're doing to me?" Mikoto asked, willing to go through with the promise, as long as it had a good enough reason behind it.

"You can simply tell me, and I'll stop okay?" Kuroko stated while she could feel Mikoto hugging her a little tighter, while their chests' were currently being pressed together.

Mikoto just nodded in reply, while she lightly kissed Kuroko on her cheek, clearly she didn't want to talk for much longer, and obviously just wanted to carry on with what they had started.

"Good girl, Mikoto," Kuroko whispered to the older girl in that same lustful tone from before, as she traced her fingers up her spine, and licked her neck, sending Mikoto into shivers, while she moaned slightly and tilted her head a little, giving her roommate easier access to her neck.

Kuroko calling her by her first name had caught Mikoto off guard a little, but the fact that she was beginning to lick and bite her neck was more of a surprise right now, 'She's biting me…she could easily leave her mark on me…but I don't really want her to stop. It feels good, and it doesn't hurt at all, I never knew she could be so gentle when doing something like this to me. Her tongue feels warm against my skin…mmm, Kuroko,' the Railgun moaned again as she arched her back slightly and panted a little, feeling her whole body beginning to heat up and sweat, while Kuroko just continued and soon caused her roommate to have lots of little red bite marks on her neck, which would no doubt turn into bruises and/or hickies in the morning.

"Ahh…Kuroko…mmm,"

Kuroko couldn't help but smile when she heard those small but very clear moans escape the older girl's lips, as she couldn't be more pleased with herself for it to be her that she was making those cute sounds for, she could tell Mikoto was enjoying this just as much as she was.

"Your moans sound so cute Sissy," Kuroko smiled as she pulled away from Mikoto's neck and looked to her happily.

Mikoto just blushed and looked away from her roommate in reply, feeling a little embarrassed, before she got an idea and slowly moved her hands from around Kuroko's neck, and down to rest on her almost completely flat chest.

"What are you doing Sissy?" Kuroko asked as she looked to where the older girl's hands were and watched as she softly began to massage her small beasts.

"I want to hear you moan as well Kuroko," Mikoto stated as her touches began to become a little firmer, while she looked to the plump little mounds, feeling just how smooth they were against each of her fingers.

Kuroko looked to Mikoto, a little surprised at first, before she just smiled and shrugged slightly, "Go ahead Sissy," she replied before she kissed the older girl on her cheek lightly, letting her take the lead for a bit.

Wasting no time at all, Mikoto leaned into Kuroko and started to kiss and lick her neck lightly, while she gently massaged her small breasts, and would often pinch at her already slightly hardened nubs, advancing more whenever she heard a slight moan escape the younger girl's lips.

"Mmm…Sissy…that feels good," Kuroko moaned happily, while she felt truly at peace with the older girl pleasuring her like this, although she did sort of wonder how she knew that her breasts were awfully sensitive.

For a girl who hardly knew anything when it came to sex, Mikoto seemed to know exactly what to do when it came to pleasuring her roommate, as she lightly bit down into Kuroko's neck, before she descended down and started to leave light kisses around her now stiff nubs, giving the same treatment to each one, before she would lick and suck on each one a little, while little red marks started to form where she would bite down on.

"Ahh…Sissy…don't bite so hard," Kuroko moaned as she could feel the older girl bite down on each of her nipples again and again, causing her to winch at the pain a little.

Mikoto simply did as Kuroko told her, and took care to be more gentle, while she continued to pleasure her roommate's breasts, stopping to just lick them lightly, as she looked to Kuroko and her heart felt like it skipped a beat when she saw the Teleporter panting a little, while a deep blush was covering her cheeks.

"You okay Kuroko?" the Railgun asked as she looked a little concerned and wondered if she had actually hurt her by doing that, stroking her cheek lightly with the back of her first two fingers, while Kuroko just smiled and nuzzled into her touch more.

"Yeah I'm fine," She replied as she leaned in and lightly pecked Mikoto on the lips, causing her to smile back to her slightly.

'I may have marked her worse than she marked me just then, but if those marks do become more visible tomorrow it shouldn't be a problem, they're on her breasts after all, so it's not like anyone will see them,' Mikoto thought as she looked to the red bite marks that were now on Kuroko's small breasts.

'True that hurt a little then, but they're still from Sissy, so I don't care if it was a little painful,' Kuroko thought with a smile, while she lightly kissed Mikoto on her forehead.

"I thought you said you knew next to nothing about sex, so where did you learn that?" Kuroko asked.

"I did say that, but I know how sensitive growing breasts are. After all mine are the same," Mikoto explained with a smile, before she looked to her own small chest, and sighed a little.

Kuroko smiled as she lifted Mikoto's chin up so that she was looking to her again, "Don't look so disappointed about it Sissy, I think your breasts are just perfect," she stated, while she gently rested her hands on the older girl's small breasts and massaged them a little, causing Mikoto to moan slightly in reply.

"Kuroko, can you kiss me again?" Mikoto stated nervously, while she slightly looked away from Kuroko.

"Of course Sissy," Kuroko replied as she cupped Mikoto's cheek and leaned into her more, pressing her lips to her's, and pushing her tongue in almost instantly, while Mikoto moaned slightly and let Kuroko pin her down on the bed, and kiss her passionately.

While the two young girls were lost in their deep and passionate kiss, Mikoto started to slowly feel Kuroko's hands exploring her body, caressing her smooth skin lightly, causing the elder girl to let out a small moan between each kiss. Kuroko soon stopped however when she came to Mikoto's waist and paused for a moment to see if the older girl would stop her.

But everything seemed fine as Mikoto allowed Kuroko to continue and start to stroke her covered sex, while she trembled and squirmed at the feeling a little,

'Kuroko's touching me 'down there'…can she tell how wet I am right now?' Mikoto wondered as she only now just realised how turned on she really was at the moment, the area between her thighs feeling well and truly drenched.

Kuroko didn't seem at all surprised but looked rather more pleased as she lightly traced her finger over Mikoto's clit, and smiled at the slightly louder moan it caused the older girl to let out, 'She must be enjoying all this more than I thought, she's soaking through her panties, and her clit is already swollen and stiff,'

"Sissy you're soaked down here," she whispered, while Mikoto just moaned in reply, constantly squirming at the amazing feeling Kuroko's light strokes shot through her body.

"T-then do something about it," the Railgun smirked up to Kuroko, speaking in a panting tone, while she slowly rolled her hips into the younger girl's touch, almost begging her for more.

Kuroko just smirked back in reply, before she leaned down and kissed Mikoto on the lips, soon removing the older girl's panties, along with her own, while the two of them now looked to each other, with Kuroko sitting on top of Mikoto, as the two girl's had stopped for a minute and gazed deep into each other's eyes.

It wasn't long before the room was filled with slight moans and gasps of pleasure and ecstasy, both of the girls being careful as to not let their voices get too loud in order for the girls next-door to not hear them. They held onto each other's hands tightly, as they thrusted against each other, and could soon feel their climaxes building up in their lower abdomens.

"K-Kuroko…Ahh…I'm close…" Mikoto managed in-between heavy pants and fairly loud moans, as she could feel her eyes welling up with tears, while she was quickly reaching her limit.

"Metoo Sissy…let's cum together," Kuroko whispered as she smiled down to the beautiful girl laying beneath her, causing her to nod and smile back up to her.

And so, within a few more deep thrusts from both of the two lovers, neither of them could hold back any longer, the pleasure they both felt hitting its highest peak, before they both gave a couple hard thrusts, and let out fairly loud cries of release.

"KUROKO!" Mikoto came first as her back arched, and her toes curled, her eyes shutting tight, while tears streamed down her cheeks, still rolling her hips against Kuroko's as she rode out her first ever orgasm, panting heavily and trembling all over.

"M-MIKOTO!" Kuroko soon followed suit as she tightly held onto Mikoto's hands, biting down on her bottom lip a little while she rode out her intense orgasm along with her lover laying beneath her.

The two young lovers, collapsed as they both panted heavily and tried to get their breath back, while they both slowly started to recover and lay together in their shared afterglow.

'That felt…incredible, I'm not sure if I can even describe it by simply saying just that. I've never masturbated, or even thought about it in anyway before, I never thought I would ever let anyone take my virginity at this age, let alone let it be Kuroko who did it. That moment before I came there, I thought I was going to burst from all that pleasure overwhelming me, not to mention that pressure I felt as my climax kept building up in my stomach, and then of course the relief and bliss I felt after, it all felt like nothing I've ever felt before…it felt heavenly,' Mikoto thought as she was still trying to get her breath back and make her racing heart go back to normal, while she looked to Kuroko with glazed over eyes, guessing that she felt the same right now.

'It was like a dream, but so much better because it was all real, it all really happened, I did all those things with Sissy, it wasn't all just some dream or fantasy, we really did it. Sissy and I just had sex, and I simply have no words for it,' Kuroko smiled down to Mikoto, panting still as she lay on top of the older girl and squeezed her hands tightly, never wanting to let them go, while she sighed slightly and seemed to be the first out of the two to get her breath back, closing her eyes for a moment as she leaned down and kissed her lover's tears away.

"I love you, Mikoto," the Teleporter now sat on top of her lover smiling to her, as she watched her breathing slowly return to normal again.

Mikoto eyes widened as she heard what Kuroko had said to her, not only had she just called her by her first name, which is someone she hardly ever does, but she also told her she loved her. True she had told her many times before, but the older girl had always thought that she was just trying to tease her like she normally does, however now it didn't seem like that, Mikoto could see the genuine look she had in her eyes while she smiled down to her and said those three words, and all the Railgun could do was feel sorry for her.

"I'm sorry Kuroko," she whispered, catching her breath and seemed ashamed that she couldn't find it in herself to return the younger girl's feelings, she now knew that Kuroko had been in love with her for a long time, but even now after they had just slept together, she still felt like she was nothing but her roommate and closest friend, nothing more,

'I'm horrible, just completely heartless. I asked her to do this for me, and she accepted, she just confessed her feelings to me, and all I can say is, 'I'm sorry?' really Mikoto just how much of a monster can you be? Kuroko loves me, and I'm just too stupid for not realising it sooner,' Mikoto cursed herself under her breath feeling like she was probably the worst person on Earth right now.

"It's okay Sissy, I know that you don't feel the same way about me, and that's fine," Kuroko stated with a forced smile to Mikoto, she wasn't expecting the older girl to return her feelings, but it still hurt to hear only those words of pity leave her lips, 'This is where my dreams and what's real are different, my dreams always end happy with Sissy saying, 'I love you too, Kuroko', but reality can never be as kind sadly,'

Mikoto could easily see through the younger girl's fake smile, and watched as her maroon eyes filled up with tears, which were soon running down her cheeks, however the Railgun knew they weren't like the ones of sheer pleasure and feelings of sheer bliss she had cried earlier, all that were behind these ones were sadness and pain.

The Railgun sighed heavily as she let go of one of Kuroko's hand and reached up to the younger girl's cheek as she slowly wiped away her tears, still smiling for a moment, while she felt her roommate nuzzle into her touch more, seeing that even though she said it was fine, that's not what she really felt inside her heart.

'I really am so sorry Kuroko,' Mikoto thought, before she squeezed Kuroko's other hand and brought it up to her lips, kissing her knuckle lightly, while Kuroko smiled down to her and bit back the tears she could feel welling up in her eyes again.

"You know if ever you want to do something like this again, I won't object to it," Mikoto smiled as she wiped Kuroko's watery eyes.

"Really?" Kuroko looked all too surprised by this, she was certain that once this was over, that would be it, this would just be a one-time thing, which they would never speak of again after tonight, but it seemed like she was completely wrong.

Mikoto nodded in reply, "As long as you ask me beforehand, and we haven't got lessons in the morning, we can do it as often as you like, okay?" she winked to the younger girl, happy to see that expression of absolute pain and disappointment slowly fade away from the Teleporter's face, to be replaced with one of happiness.

"Okay," Kuroko nodded as a real smile now formed on her lips and she leaned down to her lover, kissing her lips happily. The older girl couldn't return her feelings, but this was more than enough for her right now.

"And you have to not tell anyone about it, not even Saten or Uiharu, got it?" Mikoto warned once Kuroko had stopped kissing her lips and had pulled away from her a little.

"Can I at least tell them that I'm not a virgin anymore?" Kuroko asked, slowly going back to her regular self now.

"No…I want everything that happened tonight to stay just between us okay?" Mikoto blushed a little as she glared at Kuroko slightly, but was really happy to see her now acting like herself again deep down, after all she had never really seen that depressed side to her roommate before, she didn't even know it was there underneath everything else.

"Okay Sissy, we can keep this night as our little secret," Kuroko smiled as she put a finger to her lips and winked to Mikoto.

"Good," Mikoto smiled back to her with a nod, before the two girl's embraced each other, and soon fell asleep, wrapped in each other's arms, while they happily slept together in the older girl's bed that night.

….

Mikoto sighed heavily as she looked into the bathroom mirror, looking at all the marks Kuroko had left on her neck last night, which were now clear bruises and red bite marks that would no doubt take weeks to fade.

She tilted her head a little so she could see all the marks more clearly, and really didn't see how on Earth she was going to hide any of them, standing in her pyjamas from last night still, while she lightly touched one or two of the marks, and winced at the slight pain it sent through her skin.

The Railgun smiled slightly as she heard footsteps coming up behind her, and sighed again when she felt her roommate wrap her arms around her shoulders and hug her from behind.

"Morning Sissy," the Teleporter whispered as she nuzzled into the back of her neck happily.

"Morning, sleep well?" Mikoto asked as she looked to her roommate and couldn't help be chuckle at the tickling feeling of Kuroko nuzzling into her neck.

Kuroko just nodded, before she kissed the older girl on her cheek lightly, before she let go of her and walked to stand beside her instead of behind her, "Are we going to school tomorrow?"

"Are you kidding, there's no way I'm going to school like this, my neck's covered in bruises and hickies because of you," Mikoto smirked to Kuroko as she looked to the younger girl and ran her hand through her short hair.

"Hey you were just as bad Sissy," Kuroko pointed out, as she pulled her pyjama top down a little so her roommate could see all of the love bites and small bruises that were covering the Teleporter's neck and small chest, not forgetting the ones that were on her breasts and around her nipples, making them look a little swollen.

Mikoto smiled to Kuroko slightly, before she looked to all those marks on her skin and thought about all the things that happened last night, including the guilt she felt after not returning the younger girl's feelings, making her feel just terrible.

"I really am sorry Kuroko,"

"Stop apologizing already Sissy, it's okay really," Kuroko smiled as she cupped Mikoto's cheeks and caused her to smile back to her, before the younger girl brought her into a deep kiss.

'I'll still love you, no matter what Sissy,' Kuroko thought as she felt Mikoto kiss her back and wrap her arms around her waist, hugging her close to her.

'Although I thought of Kuroko as nothing more than a friend still…kissing her like this really does feel good,' Mikoto thought as she happily smiled into the kiss and moaned pleasantly when she felt Kuroko sucking on her tongue.

"So since we're staying here for today and tomorrow, do you think we could possibly…you know…" Kuroko trailed off slightly once their lips had parted, as she winked to Mikoto, causing the older girl to raise an eyebrow to her.

"Not so fast Kuroko, I know what I said last night, but I'll only allow you to do it with me, if we can get some breakfast first, I'm starving right now," Mikoto started as she rolled her eyes to her eager roommate.

"Deal, I'm feeling quite hungry myself anyway," Kuroko replied with a smile and a nod, before she pecked Mikoto on her cheek, and turned to leave so she could get changed out of her pyjamas, having quite the spring in her step it would seem.

Mikoto smiled as she watched the younger girl leave the bathroom, sighing a little, 'I'm sorry Kuroko, I couldn't return your feelings, but I can do this for you at least,' she thought as she really didn't mind repeating the events of last night every once in a while for Kuroko, as long as she could see that smile of her's that's all she cared about, Kuroko was happy with how things were right now, and that's all that mattered to Mikoto.

The Railgun smiled as she left the bathroom, and walked up to Kuroko, wrapping her arms around her, and hugging her tightly from behind, while Kuroko looked back to her with a smile.

"I love you Mikoto," the Teleporter whispered as she nuzzled into her roommate's neck, happy to be in her warm embrace.

"I know," Mikoto smiled to the younger girl, before she lightly pecked her cheek, and brought her into a deep kiss, giving out a pleasant moan as Kuroko kissed her back happily.

'I can't return your feelings and say I love you back, but I can make you smile and keep you happy for now, so that's enough for you, right Kuroko?' Mikoto thought as that feeling of guilt still lingered in her heart, only really realising now that yes she didn't understand the topic of sex all that well, but also there were some things she didn't know about her dear roommate and friend before last night happened, and while their deep kiss grew more passionate, she thought that with some time, maybe, just maybe, she could learn to love her as well.