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)

Pairing: Mikoto x Kuroko

This one-shot is written form Kuroko's POV (point of view) all the way through.

Warning: This contains Yuri (girl x girl) pairings, don't like? Don't read simple, otherwise enjoy. ^_^

WARNING: This contains smut! ;P

...

I don't know how long I've been lying here for, but I know it's been a while, maybe an hour...I can't quite remember. I came back to our room to rest after a particularly long and tiring day at Judgement, I thought I'd end up taking a short nap, or perhaps go for a warm bath to soothe my aching muscles, however once I returned and saw that Sissy wasn't here, I...I felt like I just couldn't stop myself. Seeing her neatly made and empty bed, it just looked so inviting to me...I couldn't help but lay down on it.

'Just for a few minutes...,' I had thought at the time however that seems like so long ago from now, as I lay bare and squirming, sweat dripping from my shaking body as I feel it covering every inch of my skin. It was late in the afternoon last time I checked, where as now I can only guess that its way past that point and Sissy could return home at any moment.

But I...I can't find it in myself to move from where I currently am lying on her bed, my right hand gripping tightly onto her soft pillow and pressing it against my naked body, knowing that this is where she would lay her perfect head to rest each night, while her sweet intoxicating scent is filling the air all around me. I feel like I've become addicted to it by now, my legs twitching and my hips rising up off the bed slightly as intense pressure continues to build inside my core.

My left hand being soaked in both my sweat and erotic juices as it rested in-between my legs, my first two fingers thrusting deeply inside my drenched entrance over and over again, I've been teetering on the edge for what seems like such a long time now, my entire body desperately in need of a release and exhaustion beginning to overwhelm me. But my climax just won't seem to come, I'm so close and yet...I can't finish, I know I haven't done this in a while so maybe that's way I just can't seem to reach my limit, and even when I picture my dear Sissy being the one that is giving me this pleasure instead...still nothing seems to work for me this time. And I don't know why.

I know this is dangerous and if I don't stop soon then Sissy could easily just walk through the door and catch me, but I...I can't stop. 'Sissy...please...I-I want to cum...' I pleaded inside my mind, but still my long awaited release didn't come, no matter what I tried nor how much I wanted to finish, and I eventually just had to accept that it wasn't going to happen unfortunately.

A deep sigh leaving my lips as I felt defeated and exhausted, as well as still unsatisfied at the same time, removing my soaked fingers from between my legs, bringing them up to my lips and just sucking on them lightly. While I waited for my breathing to go back to normal, as well as my heart to stop pounding inside my chest, soon sitting up and placing Sissy's pillow back where it belonged. Resting my hand on the bed sheets for a few moments and letting my head hang a little, before I decided to just get up and take a shower, so that I wouldn't have to worry about explaining myself to Sissy if she happened to return back to our room anytime soon.

However just as I was turning to leave the bed and head for the bathroom, I heard the slight creak of our dorm room door being opened, and the exact situation that I had been dreaded this whole time, was now slowly unfolding right before my eyes. Causing me to freeze up and unsure of what exactly I should do, panicking as all I could think of to do was quickly grab Sissy's pillow, and use it to cover my bare body, although this not being the smartest idea of mine since it really wouldn't help make this situation I was now in any better at all.

"Kuroko, are you in here? Uiharu told me that you had finished for the day and so I..." I heard her gentle voice call to me, only to pause mid-sentence when she opened the door fully and her brown eyes landed on me, before they went wide and her mouth hung slightly agape in complete shock.

"Welcome back Sissy...I err... listen I can explain..." finding myself going quiet, as I tried to work out just how I was going to try and explain what I had been doing just mere moments before she had opened the door, a nervous smile forming on my lips and a deep blush beginning to cover my cheeks, while she just stood there frozen and speechless it would seem.

"You see I was just about to go and have a shower...which is why I'm naked, a-and the reason why I'm on your bed right now is because I was missing you. A-after all I've haven't see you all day because I've been with judgement since early this morning, so you see I just wanted to-

"Kuroko...just stop,"

It wasn't the first thing what I pictured her to say in response to this kind of situation, but it did silence my rushed rambling as I just shut my mouth and nodded my head, while she simply closed the door and sighed deeply, her cheeks stained with a slightly red blush as it seemed like she was collecting her thoughts for a moment.

I sat there in silence, nervously biting my bottom lip and turning away from Sissy when she looked back to me, I closed my eyes and braced for impact as I fully expected for her to shock me right now, however the intense feeling of electricity rushing through my entire body that I was waiting for...it strangely never came. Instead I soon just felt a gentle hand rest on my shoulder, causing me to open my eyes slowly, being quite taken aback when all that was there to greet me was my dear Sissy's look of wondering and maybe even...concern?

"Kuroko...tell me what you were just doing before I opened the door? And if you try to lie to me, I swear I will shock you to a crisp, got it?"

Even though my Sissy is 'The Great Ace' of our school there are times when she can be feared enough by simply her words, and this is one of those times, as that serious yet calm look in her brown eyes caused me to just nod back and agree to tell her the truth, and not try to come up with a bunch of excuses like I did before.

"Got it...well before you came back I was...touching...or I guess pleasuring myself...okay I was masturbating while thinking about you, as well as laying on your bed and hugging your pillow. But...but I promise I didn't dirty your sheets or anything, I didn't even finish after all so I-

"What do you mean?"

She cut me off once again only this time her tone was not so serious anymore, instead she seemed almost...nervous? Her blush going redder and her hand leaving my shoulder, while I still felt on edge, after all just because she hadn't shocked me yet doesn't mean she's not planning to do it after hearing my explanation.

"Well...well I-I haven't done this in a while, so maybe that's why I couldn't climax no matter what I tried. But I want you to know that I would never dirty your sheets like that, you have my word Sissy," I wanted her to know that I meant what I was saying, and that I was being one hundred percent truthful right now, however she seemed less focused then she was just a few moments ago. Instead for some reason I felt like she was acting very differently then how she normally does when she finds me doing something perverted, and it was almost like she was trying to hold herself back...or something like that.

"You couldn't 'finish'? Are...are you still wet...down there I mean?"

She pointed to the area between my legs that I was currently covering with her pillow still, as I just swallowed slowly and nodded my head, not knowing what to expect next from Sissy since she seemed to be acting so differently from how I thought she would, which in turn left me unsure of what I should do at this point apart from just doing as she told me for now.

"Well yes, I-I suppose I am...but you don't need to worry I can quickly just go for a shower, and then we can both forget this ever happened, no problem at all," I nervously smiled and was obviously trying to get out of this embarrassing situation that I had gotten myself into, thinking of simply teleporting into the bathroom and hopefully being done with trying to explain my way out of this, but before I could Sissy sat down beside me and grabbed me by my shoulders, causing me to pause and wait to see what she would say or do next.

"Don't teleport...listen I know your confused about the way I'm acting right now, and believe me so am I...in fact I don't know what's going on with me at the moment but I...just let me help you...and don't make me regret doing this, okay?" I noticed her voice shaking a little as her hands gripped onto my shoulders tightly, while I simply just sat there wondering if I should be concerned about Sissy right now, something did seem to be awfully troubling her as I started to question her, only to be silenced once again in no doubt the most surprising way possible.

"Regret doing what? Sissy what are you talking-

She cut me off for the third time but not with her words; instead she had pressed her lips to mine and moved her hands to hold my cheeks, my mind not really registering what had just happened as all I could think was how soft her lips were. My eyes going wide as her's were closed, my heart beginning to race inside my chest, while we soon parted and she stared back to me with a deep crimson blush covering her face.

"S-S-S-Sissy?"

Was all that left my lips as my mind was going crazy, trying to comprehend just what happened, 'She k-kissed me...Sissy actually just kissed me...' That's what I thought to myself as that moment replayed over and over again in my head. However I didn't get much more time to process it all as I gazed back to Sissy, seeing her panting heavily before she apologised to me for some reason.

"I'm sorry Kuroko...I-I can't stop,"

She looked like she was fighting with herself, like her body wasn't listening to her right now, and just as I was about to ask her what exactly she was apologising for...her lips we on mine once again, kissing me over and over as she moved one hand to cradle the back of my head. Pulling me closer to her and easily breaking through my teeth to invade my mouth with her hot tongue, while all I found myself doing was melting into the deep kiss, my eyes slowly closing and my mind going blank, as the endless questions stopped and my body just seemed to be enjoying this heavenly moment.

Barely being able to even process just what was going on right now, as it wasn't long before I was pushed down onto the bed, and I felt both my wrists being tightly pinned on either side of my head. Still having the mind-numbing feeling of Sissy's tongue exploring every inch of my mouth, causing me to unconsciously moan into the kiss, which both of us were currently lost in.

I could soon feel my breath running short, my lungs pleading for air while my mind was still obviously preoccupied at the moment, as I knew this was probably the craziest thing to happen, since the only time Sissy would ever do anything like this to me was in my dreams. However this definitely didn't seem like another one of my dreams, it all felt so real, how soft her lips were against mine, how tightly her hands were grabbing onto my wrists, and how hot both her breath and tongue were inside my mouth. It was all simply too real to just be a dream.

'Wait...this is wrong...isn't it? I mean every time I've tried to kiss Sissy like she's doing to me right now, I ended up getting shocked for it. So what happened? Did I somehow flip some sort of switch when she saw me naked? But she's seen me naked plenty of times before, and nothing like this has ever happened, why it this time different? Am I taking advantage of her by not doing anything right now, I mean she's clearly not acting like herself at this moment so... just what do I do?' All this was rushing through my mind as it seemed like I was finally able to stop myself from getting even more lost in this long, deep kiss, now realizing that there was probably a lot more to this, and to what was going on with my Sissy at this moment.

'I have to stop this...I mean I don't want to, my god I don't want to...but I need to find out just why Sissy is acting so unlike herself, plus with how much my lungs are begging for oxygen right now, it's not like I have much of a choice...' Finally pulling myself together and collecting my thoughts, I squirmed and struggled to get my wrists out of Sissy's tight grasp, luckily she didn't fight back much as she just released me and held my cheeks in her hands again instead.

Obviously she was still lost in kissing me, to the point where even when I pushed both of my hands against her chest and caused our lips to part, she simply just switched to showering my jaw line and neck in kisses instead, almost like no matter what I did in response she just couldn't stop herself from continuing on. Panting to get my breath back as I felt my heart pounding wildly inside my chest, while also feeling my Sissy's soft lips caressing my skin over and over again, making me want to just let myself drown in this unbelievable moment, but that was exactly why I had to put a stop to this because Sissy doing this to me so suddenly was so unbelievable.

"Sissy...stop, what's gotten into you? Why are you doing all this?"

I felt my breathing finally going back to normal as I pushed harder against Sissy's chest, feeling her let out a deep sigh into my neck, stopping her assault it seemed, while she panted heavily and crouched over me. My cheeks going beat red as she stroked my skin with her thumbs, our eyes locking and suddenly it struck me that Sissy was like a hungry predator, and I was clearly her helpless prey in this situation.

I truly had no idea just what Sissy was going to do next, as I searched in my mind for what I should say to her, but before I could say anything at all, she spoke up instead, "Listen Kuroko...I know you're confused about what's going on with me right now, heck even I'm questioning my own actions at this moment. But...I-I can't stop..." Her tone being quite the low and shaky one, as it seemed like she was still fighting with herself over how she was acting towards me at the moment, and it looking like she was struggling to keep control, almost as if her mind was telling her to do one thing while her body was telling her to do another. And by the looks of things the latter was winning, or at least was getting the upper hand from where I was laying.

"What do you mean Sissy?"

"Well...you said you couldn't 'finish' earlier right? So how about I lend you a helping hand with that?" Her lips were on my neck again as she spoke in what was almost a whisper, feeling her warm breath against my ear causing me to shiver all over, biting my bottom lip and clenching my fists while she continued to make me feel like I was quickly losing all control, and becoming weak to her advances once again.

"After all you've helped me out of a lot of... 'Sticky' situations in the past, so why don't I help you out of this one in return?" Ending her sentence off with a light peck to my earlobe, causing an uncontrollable moan to escape my throat, while she had now simply gone back to covering my neck in soft kisses. I felt like I couldn't resist any longer, my body was being put through torture as I tried to stop myself from giving into her, my head kept trying to convince me to fight against Sissy. But how could I?

I've been wanting and wishing for this for so, so long and now here is this perfect, and probably once in a lifetime chance being presented right in front of me, my head is telling me that she might come to regret this later and so I shouldn't go along with it all, but my body on the other hand is telling me that it doesn't matter and I should just enjoy it while it lasts. After all it would be so worth it in the end...wouldn't it? It being obvious which choice was the clear winner to me soon enough as I eventually just let a long sigh leave my lips, before I nodded my head in response.

"Okay,"

Was all I was able to say before Sissy's lips were yet again on mine, bringing me into another deep and passionate kiss, which I didn't see the need to fight against anymore, and so I just let myself melt. My mind going blank once more as I felt both of my hands now being held tightly, our fingers interlocking, while it seemed like the two of us were lost in this blissful moment.

Of course since I had now given into her it didn't take long for Sissy to fully indulge herself in my body, soon moving on from just kissing my lips and instead giving my bare breasts some attention it seemed, starting off by just placing small and delicate pecks on my skin and causing me to shiver, before making me cry out in low moans as she took my already erect nub into her mouth. Beginning to suck gently at first, causing my nipple to harden while she got a little bit rougher with me, nipping at my skin and giving the exact same treatment to my other nipple, while all I could do was moan out that name that only I ever call her by and squirm against her.

"Sissy...mmm Sissy..."

My moans only seeming to encourage her to go further as she soon stopped her assault on my breasts, letting go of my hands for a few moments to quickly remove her shirt and bra, having already kicked off both her shoes and socks and being left in only her school skirt now, even taking off her little hair clip and setting it aside while I watched on in awe.

'She's really getting serious about this...I thought she might stop halfway through, but that doesn't seem to be the case,' I thought gazing up to my Sissy's beautiful bare chest as she sat on top of my stomach, admiring the way that her sweat was staring to cover her body, my attention soon focusing on her breasts, being only a little bigger than mine and obviously still developing. It didn't matter that they were on the small size, they were already perfect just the way they were, I often wasn't allowed to look at them for very long before I would normally get shocked for staring too much, so as you can imagine I was well and truly savouring this chance while I had it.

This moment being interrupted however as Sissy soon covered her chest with her arms and caused me to look to her face instead, seeing a deep blush staining her cheeks while she turned her head away from me and wore quite the annoyed expression in response to all my staring.

"Kuroko, don't stare at them so much,"

I had obviously just made her embarrassed, which definitely showed that although she had been acting very unlike herself up until this point, she was still my Sissy even though it was clear that she was still lost in whatever mindset she was currently in, and was nowhere near done with me yet it seemed.

"Sorry,"

Being all I felt I could say in reply, before she leaned down to me and began to leave a trail of light kisses starting from just below my breasts, along my navel and ending just inches away from the place that was begging for her attention the most right now.

My body desperately wanting a release as I felt myself twitching all over the closer she got to my most aroused spot, it being obvious how wet I was as all she did was lightly stroke one single finger over my drenched entrance, and I almost screamed out in pleasure if not for the fact that I instead just gasped and bit down on my tongue, I didn't want to alert any of the other girls who might be in the dorm at the moment after all.

"Guess you must have been going at it for quite a while before I came back, huh? You're overflowing down here,"

It sounded like she was more just thinking out loud when she said that, but it still took me by surprise and made my head spin like crazy, plus she didn't really give me that long to try and prepare myself for what she was about to do, as she only looked to my slit for a few seconds before crouching down and slowly inserting two fingers inside. Causing my whole body to convulse on reaction, as I almost came right there and then if it weren't for the fact that she slipped her two fingers back out again, and instead replaced them with her hot tongue, feeling the appendage already thrusting deep inside me as I was at least thankful that Sissy wasn't going to tease me much.

But before my climax could even begin to build up Sissy's tongue left my sex, as it seemed like she just wanted a single taste of my juices, and preferred to use her fingers again instead, thrusting two of them deep inside me while she began to lightly suck on my swollen clit. From there it was like a constant onslaught of intense pleasure, my hips buckling and moans being dangerously close to escaping my lips, having to cover my mouth with one hand while I could feel the other one being grabbed and held tightly by Sissy, our fingers interlocking once again as I didn't want to ever let her go.

My core finally the getting the attention that it had been pleading for all this time, after all I had already been so close before, meaning that now it didn't take much for pressure to quickly start building up inside my lower abdomen, it being obvious that Sissy could tell I wouldn't last much longer as she continued to increase her pace with every thrust of her two fingers.

"S-Sissy...Ahhh! Sissy I-I..."

I could barely even get a single word out in-between my spaced out pants, while also trying to hold back my loud moans but luckily it seemed like that's all she needed to get the message, doubling her efforts and thrusting her two fingers as deep as they would go inside me, feeling tears escaping my eyes and my toes curling in reaction to her making me ride out my long awaited orgasm.

'Sissy just made me cum...this is something that has only ever happened in my dreams, I-I never thought this would ever really happen,' Was all that went through my mind as I pressed my palm harder against my lips, muffling out my loud screams of release while I felt wave after wave of breathtaking ecstasy rippling through my entire body, throwing my head back onto my dear Sissy's pillow, and soon collapsing into a squirming mess.

Feeling Sissy licking me clean as I slowly began to recover from reaching my limit, my heart still racing inside my chest and my mind still spinning at a million miles a minute, panting heavily and removing my hand from my lips, while I felt one last soft kiss being planted onto my satisfied sex before her arms wrapped around my shoulders.

Hugging me close to her I just closed my eyes and relaxed in her warm embrace, waiting for my breathing to go back to normal and for my exhausted body to regain some energy, while I felt Sissy nuzzling into my neck as she let a sigh escape, before she sat back up and just turned away from me.

"I can't believe I just did all that,"

She seemed to be thinking out loud to herself once again, holding her head in her hands and blushing deeply as I just let my lips form into a smile, clearly seeing that she was now back to her regular-self and obviously trying to understand why she had acted the way she just had towards me. My breathing being back to normal as I sat up and wondered if Sissy was okay, however I didn't really get to say much in response, as it still seemed like she was trying to collect her thoughts and work out what had come over her all of a sudden.

"Yeah it definitely was surprising but-

"You got that right; I mean I was planning on shocking you at first, but then...just seeing you sitting on my bed, with nothing but my pillow covering your naked body. I...I just couldn't stop myself...it was like some switch had been flipped and my body was just completely going against what my mind was telling it to do," It was like she was trying to explain her actions more to herself, rather than to me at the moment which caused me to become a little more worried for her as I tried to think of something to say, hoping that I could calm her to some degree.

"Well I was wondering how you knew to do all that stuff, I mean it was like you knew all my weak spots without me having to say anything. Just where did you learn to drive someone that wild?" A slight smirk resting on my lips as I had clearly caused her to not focus on her own thoughts so much anymore, turning back to me with a slight blush covering her cheeks still, while I felt glad that I was able to distract her from wracking her brain for answers for now.

"I-I just did the things that I would normally imagine being done to me whenever I...touch myself," Was her simple explanation which I wasn't expecting at all to be her answer, as I was clearly taken aback at first while Sissy just folded her arms and rolled her eyes at my response.

"Wait...you touch yourself Sissy?"

"Well sure, but all teenage girls do that sort of thing from time to time. You were doing it before I walked in earlier," Her tone raising a little as she seemed be on the defence now, as my smirk grew wider and I crawled over to sit closer to her, getting the feeling that I might be pushing my luck a little here, but this was the first I had ever heard about Sissy doing something perverted so of course I wanted to hear more about it all.

"True. So it's no surprise that I think of you when I do it, but what about you? Do you think of me when you masturbate, Sissy?" I asked wanting to know so much more about the kind of perverted things Sissy got up to whenever I wasn't around, as I could already picture her pleasing herself while possibly thinking of me. However my question not being one that she wanted to answer it seemed, going red and just turning away from me, before she stood up from the bed and retrieved her forgotten shirt and bra from the floor.

"Just get off my bed and get dressed already,"

She replied as I took her low tone as well as her warning glare as a clear sign to stop my teasing, 'Yep she's back to herself alright,' I sighed and decided to just not push my luck anymore, knowing I would most likely get a good shock if I continued on for much longer. But before I thought of getting up and doing as I was told, I was reminded of an earlier worry I had, which caused me to think for a moment, catching Sissy's attention as she had just finished putting her bra back on.

"Wait...Sissy..."

I paused thinking back on just what I was going to say to her, biting my bottom lip as I did want to know what her answer would be to this particular question I was thinking of, but I also was a little scared of what that said answer just might be. While she just looked to me with a wondering expression, obviously wanting me to get out what I wanted to so that she could probably go and freshen up, as she seemed reluctant to put her shirt back on just yet and was most likely planning to go for a shower, once I had said what I needed to.

"Do you regret...doing all those things to me?"

I asked feeling nervous still as I just didn't know how she would respond, turning my head away from her as I hoped she wouldn't take too long to answer, only to be a little taken back when she came to sit down beside me on her bed again and sighed slightly, shaking her head to me and softening her expression into a small smile.

"No, I don't. I mean yes I am still unsure as to why I did all things to you so suddenly, but that doesn't mean I didn't want to do them. And if you...happen to need a 'release' again you can just come to me about it, instead of having to deal with it yourself...you know," Her tone was gentle and caring as she rested her hand over my own, causing me to not quite believe what I had just heard at first, as I thought for sure this was going to be just a 'onetime thing', and would not have ever imagined that she would be okay with doing it again sometime. But that's exactly what she had just said to me, it taking me a minute to process how she had just answered me, before a hopeful smile spread across my lips.

"Really, you mean it Sissy?"

"Yes, but as long as it's only every now and again, and not all the time. And you can't tell anyone about this, especially not Uiharu or Saten, got it?" She demanded more than asked as I just nodded to her quickly, before I wrapped my arms around her and hugged her tightly, nuzzling into her neck and closing my eyes while I could feel her soon embracing me back, and combing her fingers through my long hair gently.

"You know Sissy...if you ever need a 'release', I could help you out too," Breaking the short silence that had fallen on us as I whispered into her ear, winking to her a moment later and causing her to widen her eyes slightly, a slight blush beginning to cover her cheeks again, while she turned away from me and I just held her closer.

"I'll think about it, now just get dressed already,"

Was her reply which I just took as the best answer I would get from her right now without running the risk of getting myself shocked, and so I simply just let go of her and let her head for the bathroom, while I moved to go and follow her, but she quickly stopped me and just gave me a warning glare.

"Aww come on after all you just did me, can't we please have a shower together Sissy?" I pouted hoping that she would say yes just to stop me from bugging her any further, and surprisingly enough she did, in the quite the annoyed tone mind you.

"Fine, but you better keep your hands to yourself alright?"

She warned as I nodded happily and simply just followed her into the bathroom, without anymore teasing. After all everything that had just happened between us felt like my most wildest dreams had finally come true, so I was more than glad to just stick with a shower and nothing more, since I can guess we'll likely be having a lot more showers together after we're done 'lending a helping hand' to each other whenever we may need to from now on.

...

Hope you all enjoyed and thank you for reading.

Killerchainsaw ;)