Work Text:
You had always been a fan of Amane Kanata.
Ever since you saw her first stream you'd been hooked. You religiously watched her every video, listened to her music, bought merch even just to feel that little bit closer to her – forming a connection that was perhaps a bit too intimate for viewer-and-artist. Who could blame you though? Kanata was the perfect blend of cute and charming and funny, and everything else between.
So when you saw her at a convention in person, you didn't hesitate to chat her up, to take this once-in-a-lifetime chance to speak with her. It wasn't anything deep or serious, you weren't deranged enough to profess your love or anything like that, but your interest was clear. You parted ways with her that day, happy. Then when you tuned into her next stream and donated, she recognised you. Cheerily welcomed you.
Within months you had moved to messaging. Nothing beyond friendly chatter, but when she came to visit your home city you were first to invite her on a tour, to show her around like a good host. It was only right. Just like how it was only right to splurge on your oshi, to make her feel welcomed and cared for. Your devotion, perhaps, had been what led to Kanata kissing you that night before she went into her hotel, bidding you a fleeting, bashful goodnight.
By the end of the week you were dating. Within the year you had moved in with her.
For a fan, it was nothing short of a dream come true. To be dating your oshi, to be able to hold and kiss and tell her how wonderful a person she truly was-
But, it also came with downsides.
For one, you couldn't tell anyone about your relationship. Not friends, not family and certainly not social media – your relationship had to utterly top secret. That also meant limited displays of affection in public and never at events. Many times you couldn't even be with her when she was at formal events, or only while posing as her bodyguard and no more. Which of course all made sense; you knew how some people could be and you wouldn't wish chaos upon Kanata, so you dutifully kept your lips zipped shut.
However Kanata... she was also very devoted to her career. Again, understandable. Logical even. Having an idol career was a dream for many and a dream for her especially; just being able to perform to her fans or record music was something many would kill for, and you naturally gave her the time and space needed to do her job. The problem was that this meant your actual time together felt sparser and sparser.
Recording. Songwriting. Rehearsals. Conference calls. Streaming. One thing after another always demanded her attention – and 'demanded' was really the only word for it. Her free time even before meeting you was limited but now that you were together it felt as if she had even less time. Again, it was understandable. You knew how hard she worked and thus you had the wisdom to be patient, to be forgiving, to be kind.
But sometimes it was just too big an ask.
Such as today.
'...she really ditched me, huh...'
You were never one to really care about birthdays. You didn't like the spectacle and parties, you never had, but most of it you just didn't care for it – another year around the sun, in the end. However when Kanata had agreed to go out with you it had lit a spark of delight in you that had crackled from morning to noon-
-which was when she got an urgent call from her friends. They needed a back-up singer for the group project.
You understood. You really did. But it still hurt to have Kanata look you in the eye, smile apologetically, and leave you behind just so she could go do work. On a day she wasn't meant to be working and on a day you were supposed to spend together hanging out and 'making the day special', as she so called it.
In the end you never went to the planned restaurant for dinner – eating by yourself would just make you feel worse. You barely had the will to visit a few stores while you were in the area but disappointment eventually led you back home one step at a time.
A sigh, soft and slow, passed your lips. The air was cooling now as the sun began to dip beyond the horizon; the orange sky easily seen through the window atop the stairs. You marvelled at it passively, tracing the streaks of darker clouds that cut through the hazy orange hue that dominated the skyline; distant buildings towering up as silhouettes against the glare of the sun.
You turned away from it, your eyes landing on the door. In the quiet of the stairwell some part of you debated just... not opening it. Not risking finding her already home, but you shook the thought of as soon as it came. She likely wouldn't be back anytime soon; probably not until it was dark. Maybe you should start preparing dinner... but, well...
Maybe it was petty of you, but you didn't feel like making dinner for her tonight.
Sighing forcefully you purged the thought, banishing the insidious grip of bitterness before it could lock itself around your heart. Stalwartly ignoring the murky feelings in your chest you fished your key out and promptly jammed it into the lock, needing to fiddle with it for only a few moments before you successfully unlocked the door. It creaked slightly as it opened and you pushed it further with your shoulder, marching inside and dragging your bags of goods in with you, leaving them just beyond the threshold.
The door locked easily, the familiarity of the action granting you some measure of stability. You held onto it as you took your shoes off, as you hung your jacket up, as you hefted your bags up and left them on the nearby table so nobody would walk on them. It was simple, easy, focus-absorbing.
So much so you almost didn't hear soft footfalls come out of a room, and near you.
''Welcome back~''
Konata. Kanata's younger sister – not that you could tell by appearance. With a bright, chipper smile and deep purple eyes she stood taller than Kanata and was distinctly curvy; said curves easily seen even through her black turtleneck sweater, the gap in the chest and the detached sleeves adding a splash of contrast between her skin and the black fabric. Black thigh-highs clad her long legs and her nails were freshly-painted, you noticed; their purple-black colours shiny in the evening light.
''Hey.'' You replied tightly.
You didn't want to talk right now.
Unfortunately, Konata seemed to have other ideas.
''Hm? Hey, you alright?'' Konata hopped closer, the dip of concern to her brow forcing you to look away. ''Where's onee-chan?''
''Friends called her. Work stuff.'' Was your reply. Stiff, too stiff – your throat constricting with emotion.
Konata's expression was easy to read – her eyes widening and fingers splaying across her lips, before her brow dipped and unmitigated concern softened her expression. ''She just left you? On your birthday?''
''Yeah. She did.'' It came out harsher than you wanted – but not as harsh as you felt.
Was it really that much to ask, for just one day together? Especially after she explicitly suggested it beforehand?
''That's not right of her...'' Konata murmured, and you had to look away again. The pity in her eyes was too much. ''Come with me.''
''I'd rather just go to my room.'' You brushed her hand aside-
-but she grabbed your wrist. ''Nuh-uh, not leaving you alone when you're like this. You deserve some good company for a change.''
The words were surprisingly sharp, almost biting, but not directed at you. You didn't get the chance to inquire though before Konata was pulling out, nearly making you stumble over your own feet as she led you down the corridor – and instead of into the room on your left, she pulled you into her bedroom on the right.
It was about as girly as ever. Purple walls with RGB lights around the ceiling, posters of bands and anime characters, a desk filled with nail polish and other beauty products with multiple dresses draped over the back of her chair; it was messy but in a somewhat pleasant way. The evening sunlight spilled in through the window opposite the door, blinding you momentarily until Konata pulled you to her bed, the black quilt neatly tucked.
Until you sat down on the edge and she joined you on your right, her hand squeezing yours. ''C'mon, tell me all about it.''
''It's fine, Konata. Really.'' You insisted gently, though you didn't bother removing your hand from hers. Not that she'd likely let you. ''It's not like she ditched me, she has work.''
''She always does.'' Konata frowned at you – a rather cute expression, like a grumpy cat. ''I could see how excited you were this morning, so she could too. And yet she still agreed to go work and leave you behind.''
''What else was she to do?'' You argued – why, you weren't sure. You were ticked off too. You knew it was rude of Kanata – but you also understood how important idol work was to her.
You had always been second place to it. Why now, of all times, should you consider yourself first place? Just because it was your birthday?
Konata squeezed your hand, her shoulder bumping against your own. ''Maybe she should learn to appreciate you more, and everything you do for her. Honestly it's unfair how nice you are to her.''
You shook your head. ''I'm not-''
''You cook for her. Help her move stuff when she asks. Buy stuff for her under your own name to give her better privacy.'' Konata listed off swiftly, her tone uncomfortably even, uncomfortably serious. ''You never get to invite your friends 'round because of Kanata, you can't talk about your own girlfriend, and I've noticed you dropping hobbies whenever Kanata's needs come first. You do anything and everything for onee-chan.''
''And?''
''It's not fair. To you.''
You... weren't sure what to say to that. Unfair to you? Maybe. But.. well, Kanata came first, didn't she? She had her own struggles, struggles that Konata was doubtlessly aware of. Yet still she was siding with you over her own sister.
''Is...'' You swallowed. ''Isn't it wrong of me though, to be annoyed with her?''
''Not at all. She kinda deserves it at this point, to be honest.'' Konata shuffled closer, her eyes so wide with imploring pity. ''Seriously, you're such a great person and onee-chan doesn't seem to see it. She's was so much happier when you first started, but now it's like she's forgotten you're your own person, not just a thing to support her.''
You digested those words uncertainly. Did Kanata really view you so lowly? Surely not. No, definitely not, she wasn't a shallow person by any means... but, she wasn't taking your own wants into account. Konata's words made that clear, and you couldn't find the evidence to refute her. Or maybe you were just growing tired with defending your girlfriend's actions all the time. If even her own sister would stand against her, surely your frustrations weren't unwarranted?
Konata shifted then, her hand leaving your own – and by some impulse you grabbed it. She stilled only for a moment before twisting her hand around, allowing her to interlock her fingers with yours rather intimately, the thought causing your throat to close up. It was a dangerously intimate handhold, but right now you wanted- needed her comfort, her presence. A sentiment Konata seemed to pick up on.
Quietly she leaned her head on your shoulder. ''You know... I actually kinda envy onee-chan. Having someone like you loving her... it's hard not to be jealous, y'know.''
Your face warmed at the indirect compliment. Part of you almost wanted to say you didn't do anything special, but you just... didn't. You let yourself absorb the compliment. It felt nice.
''How you cook her favourite meals just to make her smile, how you take care of her when she's sick, how you make sure everything's always going well for her...'' Konata listed off softly, her smile small but fond. ''It's not fair, you know? That's kinda a dream partner for me..''
Her fingers curled around your own and you looked her way, but she wasn't looking up at you – her eyes focused on the far wall. Yet due to her posture she was pushing her chest out a bit, the gap in her sweater granting you a look at the ampleness hidden beneath the black fabric – and though you averted your eyes, the image pressed itself into your mind all the same.
''Onee-chan... she doesn't deserve you.'' Konata added, almost as an afterthought. ''She doesn't show you the care and affection you deserve, but...''
Her fingers uncurled from yours, and touched your back instead. ''But I could.''
A jolt reverberated through you – smaller than you expected. Your heart hammered in your chest and you looked at Konata; really looked at her. Her pink cheeks and eyes full of yearning, the arch to her back that pushed her chest out and the hand that came up to caress your jaw. It was plain to see what she was implying. It was easy to understand what she was asking and easier to know why you should refuse, why you should push her away and tell her to never speak of this again-
But maybe you were feeling a little selfish today.
And, perhaps, a little bit vindictive.
You dipped your chin, darted in – and Konata moaned, soft and sweet as you kissed her full on the lips. They were plumper than Kanata's own and laced with a faint taste you couldn't fully explain, only that meshing your lips against hers felt so right you melted into it; your hand catching her nape and pulling her deeper into the kiss, pressing your lips against her own and devouring her low, embarrassed moan.
The need to breathe though pulled you back, and no sooner had your lips left hers did you feel a pang of guilt. This was your girlfriend's sister after all – yet just as the guilt began to fester within you Konata pecked you on the cheek, her lips leaving your skin tingling from where they had been.
''Don't think about her right now.'' Konata insisted gently, her smile so very kind. ''She won't know anyway.''
Her words sent a shiver through you – arousal at how scandalous she sounded, excitement at what she was implying, and a nervous shame of going behind Kanata's back. Yet when Konata leaned in you found yourself doing the same; meeting her halfway and savouring those plump lips against your own, her little hum of content cute and enticing you to deepen the kiss; your hand catching her biceps then trailing down to her shoulder.
You drew back for a brief breath but when Konata tugged you in you melted, losing yourself in the soft tenderness she exuded, in the gentle seduction she wove over you. She shuffled closer to kiss you better and you settled your hand on her side, your heart pounding in your chest as you felt the side of her breast brush against your hand. Compared to Kanata who was as flat as a washboard, Konata was so plump you could probably motorboat her.
'Just a quick feel, just to see what it's like.'
A thought that ultimately tempted your hand to her right tit. Though clad in the thick cloth of her sweater you could still easily feel the plumpness of her breast fill your hand, and the soft moan you groped out of Konata was sensual beyond words. She smiled into the kiss and drew back from it, forehead resting against your own and letting you soak in her deep amethyst eyes from up close.
Then with nary a word Konata shifted off of the bed. For a brief, frightened second you thought she was leaving – but with a caring smile she pecked your jaw and eased herself down before you, kneeling on the floor. A position that sent a shock of arousal racing up your semi-erect length. Excitement made you stiffen against the fabric of your underwear as Konata brushed her fingers along your jeans and when she pinched the button loose, you didn't stop her – the guilt simmering in your throat kept at bay by the desperate yearning for your girlfriend's caring, sympathetic sister.
Your pants loosened as she pried the zipper down and you nudged them down your thighs, enough to expose your boxers more. Cooing Konata wasted no time in popping loose the button on your boxers, your erection springing up before her and landing right in her waiting hand. Her fingers felt pleasantly slender against your shaft and it took a conscious effort to bite back a moan as she stroked you.
It didn't even feel that intense or anything. It was just a gentle hand, nothing more.
But weeks of pent-up stress was making itself known, clearly.
Dainty fingers encircled your cock, her dainty grip just firm enough to loosen a breathy exhale from your throat. Smiling cutely Konata leaned in and smooched your tip, her plump lips oh so sensual as they brushed against it, planting another chaste kiss as she steadily stroked your erection, her lewd touch simultaneously rising unease and relief in you. Unease at how much you were liking this, how wrong it was to go behind Kanata's back, to let her sister do this.
And relief at how good it felt after weeks of not even having the time to stroke one out, let alone be intimate with Kanata. Worse still you couldn't pretend it was Kanata giving you a handjob either; Konata's fingers were slightly longer and just a bit thicker than her older sister's, and the gentle enthusiasm in her tip-licks made your toes curl with irresistible pleasure, the breath in your lungs burning until you exhaled it out.
''Does it feel nice?'' Konata asked curiously, her kiss touching your tip. ''I've never done this before, so~''
You pursed your lips to quell a moan, daring to speak only after the urge subsided. ''Y-Yeah... you're doing good.''
Konata brightened under your praise. Even though it was casual praise at best she acted as if it meant the world to her – and that though alone made your heart clench. Kanata never reacted like that, never treated your praise as anything grandiose. At most she laughed it off or quietly thanked you. But still-
The thought didn't manifest before Konata's lips encircled your tip. They felt wet, warm, and sucked you into her even warmer mouth. You gripped at the quilt of her bed and groaned on instinct, unable to force the sound back into your throat as Konata started to bob her head, sucking you off with a devotion that made your heart hurt. Relinquishing her grip on your cock she held onto your thighs and spread them further apart, focusing entirely on using her mouth as she sucked her way along your length.
It didn't hurt that, leaning forwards as she was, you got a rather inviting look at her cleavage; her large bust made prominent by how taut her sweater was. As if sensing your gaze Konata cracked her right eye open, peering up at you first with confusion, then delight; her ensuing coo physically felt around your cock before she delved deeper, taking more of you betwixt her lips. Her lips smeared her spit into your shaft and her warm breath trickled down your shaft in a loose wave, tensing your balls and sending a shiver up your spine.
''Konata, I- mn...'' You groaned, reflexively, as the busty angel slurped up your shaft.
Preluding the next suck, and the one after that – her head bobbing with earnest effort and glazing your shaft as a result. The wet warmth of her mouth, the gentle press of her tongue beneath your tip, the hands that kneaded your thighs; the sensations all combined to be overwhelming, your breath catching in your throat and coming out as a laboured groan, the sound escaping freely despite your attempt at quelling your voice.
When Konata suddenly popped her lips off of your cock. The sudden lack of sucking was almost a shock and you refocused on her, a question on your lips – and one that you never spoke before Konata dug her fingers beneath the hem of her sweater. Not a moment later she pulled it up and up and up, exposing creamy skin and a soft belly, then a strapless black bra that pushed up her sizeable breasts; the sight captivating you.
With a thump Konata deposited her sweater on the floor. Within a few seconds her bra was fiddled with, and ultimately came loose – exposing those melons before you, her nipples soft and pink. The softness of her tits too was emphasised as she squished them between her fingers, holding her chest as she shuffled closer-
And promptly smothered your cock between her tits.
The feeling took the breath from your lungs. It wasn't as intense as her blowjob but their was something so maddeningly hot about seeing your dick between her tits, of seeing her smile sweetly as she pressed her boobs together and rocked on her knees, sliding your cock between them and cooing lovingly as she pleased you. Kanata could never do this, your brain traitorously noted. Even if she was fully willing she was too flat to paizuri you, and with how conscious she was of her chest size she likely would never even try.
But Konata did, and was. She knew where you were looking and gave you what you wanted without even being asked for it. You pursed your lips at that but a moan fled your throat all the same, accelerated by the soft marshmallows that kneaded your cock on all sides. You refocused on her just in time to see Konata dip her chin and drool onto your tip, her opaque saliva splatting against your tip and running down your throbbing cock-head, swiftly smeared in by her smushing breasts.
The sticky noises that escaped her cleavage bordered on pornographic, forcing moans out of you in turn – stiff, stilted gasps without words, your voice trapped in your throat as you felt your orgasm rapidly draw near, every mush of her tits squeezing you towards climax. You endured it, your hardness trapped between her softness, her adoring gaze and silly smile inviting you to cum whenever you were ready, that she'd keep pleasing you until that moment came-!
''K-Konata...!''
You came. Gasping out another woman's name you gripped the quilt as you erupted between her tits – spurts of semen jumping from her cleavage and landing atop Konata's tits, her pleased giggle preluding the firmer squish that made you moan; thrusting up into her tits and making a shameful, sticky mess all over her skin. Her breasts smothered your tip just as another rope was about to shoot and it splattered messily between her tits; your own load sticky against your shaft as Konata mercilessly wrung you dry.
Pleasure kept your nerves electrified as you came down from cloud nine, every breath leaving your lungs aching and your dick throbbing against her tits. A small shock trembled down your shaft when Konata finally leaned back; your gaze drawn to her chest and soaking in the view of her cum-covered boobs, streaks of white topping them and plenty ropes clinging between her breasts. It was a view that just made you harder.
Doubly so when she stood up. Only now did it occur to you that she was wearing only a pair of black panties, the flowery trim not hiding how low-cut they were, showing a hint of groin even when fully on. She hadn't removed a skirt or shorts, either; she was just wearing underwear beneath her sweater this whole time. Walking and chatting with you for months with nothing but panties beneath her sweater.
Panties that, presently, inched down her hips. ''Hey... wanna do it?''
Your throat clenched. You should stop here. You should say no. You should stay loyal to Kanata.
'Just once.'
You gave in, breathing out an agreement.
Konata smiled – a bright, delighted expression that brought out her cuteness. A tug of her thumb sent her panties falling to her ankles and the sight of her pussy made your dick ache with sudden, primal need; her puffy lips a touch sticky already, as if just pleasing you excited her beyond measure. Your throat closed up and you watched her hop out of her underwear, utterly nude before you and taking a single step closer; easing herself down onto your lap.
You took her hips in your hands, pulling her close – and groaned into the inevitable kiss. Her lips felt so nice to kiss you lost yourself in the moment, fingers digging into her hips and pulling her against you, your erection pressing against her groin. Konata moaned so very sweetly and lifted herself up, rubbing her slit on your tip, her wetness clinging to it and sending a tremor, deep and primal, down your shaft.
''Hehe...'' Konata giggled softly, tone dripping with anticipation .''Let's make love, darling~''
Slick, honeyed lips parted for you and you groaned as Konata pushed herself down your swollen length. Her walls clenched around your intruding member and her soft whine of bliss fried your mind; your eyes glued to her pussy as inch after inch of you was swallowed up by her loins until just over half of you was snugly squeezed by her nethers, her angelic pussy lovingly kneading you.
Then with a little mewl she dug her knees into the bed and lifted herself up to the tip – only to drop herself back down, moaning with you as she nearly hilted on your cock. The oozing heat of her womanhood was enough to fry your thoughts and all you could do was dig your fingers into her soft thighs, grounding yourself with her body and groaning with her as her nethers twitched and squeezed you adoringly, as if the happiest place in the world for her was on your dick.
Konata cupped your cheeks then and tilted your head back, affixing you with an adoring smile – right before she pressed her lips unto yours. You kissed back without thinking, your hands gliding up her hips and cupping her cum-covered breasts – groping a moan out of your partner and groaning with her as she slowly rode you, her pussy seizing around your length and moulding to your girth.
''A-Ah, it feels so good, it's do deep- myn~'' Konata's lips brushed yours as she moaned. ''Do I feel good~?''
You didn't trust your words so settled for a groan of agreement, breathy and rasping. Konata mewled in delight and paid you back by grinding down onto your dick, stirring you about her drooling pussy before smoothly going back to bouncing on it – the wet, sticky plaps of flesh joined by the creak of her mattress, the noises borderline scandalous given your current situation. Yet you simply groped her ample breasts, kneading sweet sounds out of your girlfriend's sister and bucked up into her, jolting a moan out of her.
It was intoxicating, thrilling, addictive. You tried not to think of Kanata right now but it was impossible not to compare her with her sister. How curvier Konata was, how eager and motivated she was to have sex, how lovingly her loins wrapped around you. Sex with Kanata had felt intimate, but often just tentative. Slow romance beneath the sheets or more loving pounding from behind.
This was wholly different. Konata slid down your shaft with open want, her moans rich as they filled her bedroom as you filled her cunt. Her sopping tunnel gripped you desperately as she impaled herself onto it and it was all you could do to keep up with her; gasps and groans forcing themselves from your lungs as you felt her wet pussy around your cock, her excitement literally dripping with how plentiful it was.
''K-Konata...'' You groaned out her name, voice tight.
You were close.
And Konata knew it.
''Cum.'' She held your cheeks; amethyst eyes lidded yet imploring. ''Let all your love out into me~''
Your throat tightened and a weak agreement loosened itself from your throat, your fingers digging into her ass as you helped yank her down, her nectar-laden lips glazing your shaft and guiding you deep into her quivering, clenching depths-!
'Fuck-!'
You came. Through gritted teeth you groaned and flooded Konata's depths with semen – powerful, potent pulses of pleasure pumping up your cock and delivering untold amounts of cum into her womb. You felt her buckle, heard her gasp, and held onto her for dear life as she ground herself own onto you – sweet gasps reaching your ears as she orgasmed with you, overjoyed as you knocked her up and showed her the love she so clearly yearned for.
A shaky breath loosened itself from your throat, easing the tightness within. Similar tightness clenched around your cock and you rocked your hips, pumping into it as Konata rode out the tail-end of her orgasm, her weary mewl gentle on the ears. Her ensuing moan as she lifted herself up and off of your cock made you shudder and when you met her lidded gaze, so full of dazed adoration, you acted without thinking.
''Mmh...!?''
A grip, tug, push – and you had her on the bed beneath you. You broke off the kiss and reared your hips back, still achingly sensitive-
''Yah~!''
-and you were back inside of Konata once more. Her sopping wet pussy was overflowing with your load but you sunk into her all the same, groaning with her as you sheathed yourself up to the hilt between her gleaming folds and pulled out just as fast – electric-like pleasure shocking your nerves but not stopping you from pumping yourself into her cunt, each thrust faster and rougher than the last.
Until you were actively ploughing Konata into her own bed. Her fingers clutched at your shoulders and you suddenly jerked your hips forth in response, hilting in her syrupy cunt and grinding your tip deep inside of her, eking out a string of whimpers you wanted to hear more of. A kiss to the corner of her mouth made her giggle and a kiss drowned her ensuing moan; her fingers curling into your shirt as you resumed thrusting, pumping you into her cloying depths.
''I love you.'' Konata moaned against your lips, her words clinging to them like spit. ''I'll be everything you want me to be.''
The devotion lacing her tone, the submissive adoration, the sheer love made your heart clench – and you kissed her, devouring her happy giggle as you rammed your cock into her, filling her needy pussy with every buck of your hips. Her soaked loins squelched with every rough thrust and the headboard banged against the wall in protest of your actions, but if anything that just made you rut into her more; casting aside that fringe of hesitation that plagued you and making love to Konata.
The sounds of sex rippled through the room and doubtlessly into the hallway beyond but you hardly cared, pounding her into the bed – and when you found release her squeal imprinted itself into your mind, her orgasm so vocal you instantly wanted to hear it again.
Enticing you to flip her onto her belly and hit Konata from behind, her ass bouncing with your every thrust.
X-x-X
Just beyond the boundary of the front door, Amane Kanata sighed.
''Ugh, finally... I hope I didn't keep him waiting too long...''
In her hands, carried with special attention, was a handmade birthday cake.
''I hope he'll like it... hehe...''
[END]