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allfortzu · 3 months

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keep it going all night (don't stop)

-- dahyun / tzuyu, 3.55k. smut // overstimulation, exhibitionism. dahyun's just a liiittle mean and sana makes a brief appearance // MEN DNI

where do they get all this energy, anyway?

dahyun doesn't know where tzuyu gets all this energy.

“i- i can't, tzu,” she pants, pushing at tzuyu's wrist.

her eyes are already falling close, and she's all but knocked out in between laboured breaths and weak trembles.

tzuyu, on the other hand, still has a palm on her thigh and the same lidded gaze she had when she dipped her fingers under dahyun's shorts an hour ago.

though, she obeys anyway and pulls back her hand.

“are you okay?” she asks, voice exceptionally tender despite her messily wet fingers.

“mhm,” dahyun mumbles, head lolling to the side. “you were… really good.”

there's a pleasant buzz in her tummy that could coax her to sleep any moment, but she also desperately wants to repay the pleasure.

“are you?” dahyun continues, urging tzuyu to come closer.

“i am if you are,” tzuyu grins.

she lays a reassuring kiss on the tip of dahyun's nose, calming dahyun's heartbeat, but dahyun isn't quite convinced.

“that means you're not.”

tzuyu only keeps smiling. she brushes stray wisps of hair off dahyun's forehead, even though dahyun's sure it's too messy at this point to be saved. “sleep, unnie. i’ll clean up.”

dahyun throws an arm over tzuyu's neck to keep her in place.

they're not even undressed, so she can't imagine tzuyu's had enough already.

“i'm not sleepy. tell me what you're thinking about, please?”

she plays with the baby hair on the back of tzuyu's neck idly, intent on looking right into tzuyu's eyes.

tzuyu has never been the type to get off from just being on the giving end – dahyun knows she's thinking about something; knows she wants more.

“unnie, don't look at me like that.”

“like i want to know what filthy thoughts you're having right now?”

tzuyu bites her bottom lip, eyes darting. “... i don't know if you'll like it.”

dahyun slips her palm down the tzuyu's cheek, bringing tzuyu's focus back on her. “i'll love it as long as it makes you feel good, you know that.”

their eyes meet for only a moment before tzuyu panics again. “you don't have to if you don't want to.”

dahyun lets out an endeared chuckle. “i don't think i'll ever not want to try, but i promise.”

tzuyu sucks in a breath and lays her forehead on dahyun's shoulder.

“okay,” she says, then swallows.

“can you be a little, um… mean...? to me?”

dahyun's frowns slightly at the unfamiliar suggestion.

she knew tzuyu loved being praised, but this sounded like the complete opposite.

“like, calling you a… slut?” dahyun tries.

“no!” tzuyu jolts up, though still awfully flustered. “not… not the names, but something like that. just… i don't know. like… be mean, but still say i'm good..”

dahyun's mind blanks for a second, then suddenly there's warmth blossoming from the base of her neck up to her cheeks, and her imagination runs a little.

“oh.”

she wonders how long tzuyu has been thinking about this – and how tzuyu has only now just told her about it. a part of dahyun flushes at the thought of tzuyu becoming even more submissive under her, but another part of her melts at tzuyu's vulnerability.

before she can conjure up a coherent response, one that could encapsulate all her feelings, tzuyu pulls away to stand up.

she presses her palms over her face to cover its reddening hue, embarrassed. “it's okay, forget it.”

dahyun reacts instantly. “no, let's try.”

she scrambles to stand up, reaching out to touch tzuyu's elbow reassuringly. she gently tugs tzuyu hands down, prompting her to look at her, careful.

“really?” tzuyu asks meekly. her palms fall from her cheeks, but dahyun can still feel the tension in her shoulders.

“really,” dahyun catches her wrist and intertwines their fingers, rubbing her thumb soothingly.

she steps closer, then whispers carefully into tzuyu's ear; lets her breath hit tzuyu's jaw. “just tell me when to stop.”

tzuyu's heart flips and she feels like she should say something – but all the words stuck in her throat come out as a squeak when dahyun kisses the skin right below her earlobe, slow and soft.

“hyun– ”

“sit down, baby,” dahyun husks, in her velvety low timbre that always makes tzuyu melt.

tzuyu sits and stares up wordlessly as dahyun moves to straddle her lap. her hands automatically find purchase on dahyun's waist before dahyun pushes them away.

“no touching.”

tzuyu pouts. “unnie…”

dahyun pinches her cheeks and raises her brows cheekily. “do you want me to tie you up too?”

she means it as a joke, but then tzuyu starts pursing her lips and clutching at the sheets, and dahyun knows how to read her all too well.

she scratches tzuyu's chin lightly, smirking. “i'll use the silk, hm?”

they don't use restraints much, or toys for that matter, but dahyun guesses this is special enough of an occasion.

as she rifles through their closet for that largely untouched box, tzuyu remains frozen in place.

“i said no touching, not no moving,” dahyun chuckles, returning to her lap once again.

there's a nagging voice in the back of her head telling her to be mean, but she also really can't help pampering whenever tzuyu freezes up like that, too shy to make a move. it reminds her of their first time together – though, in a way, this was their first time, too, doing something a little different.

dahyun traces her fingers from tzuyu's shoulder blades down her wrists, then brings tzuyu's palms together in between them.

her gaze darts back up to tzuyu's eyes, a silent request for permission that is promptly given under dilated pupils and anticipating nods.

tzuyu's skin looks incredibly pretty against white silk, dahyun realises. maybe they should touch that box more.

“you are a sight to behold, tzu,” she whispers, almost struck breathless.

dahyun pushes tzuyu back, dragging her bounded hands over her head as she falls.

she tries taking it all in – tzuyu's doe eyes, tzuyu's already heaving chest, tzuyu under her. she doesn't think she could ever tire of this sight.

“i'll stop everything the moment you say stop, okay? or just put your arms down and tap my shoulder twice.”

“i can take it,” tzuyu insists.

dahyun smiles. she barely even has to set the mood – tzuyu's brought herself all the way in.

“already so eager to please – aren't you such a good girl?”

she knows it's contrary to what tzuyu had requested, but she also knows praise gets tzuyu going just as well.

by the looks of tzuyu biting her bottom lip and as red as dahyun has ever seen her before, she's absolutely right about it.

dahyun presses her wrists into the mattress forcefully. “keep your hands up here for me, dear.”

she leans over to give tzuyu a kiss, but when tzuyu turns her face to try and capture her lips, she stops just short of them.

“not yet,” she juts.

tzuyu gapes a little, surprised.

dahyun lays a peck on her cheek. “that'd be too nice, wouldn't it?”

a tinge of helplessness flashes across tzuyu's face, but dahyun ignores it in favour of peppering kisses down her jaw, nipping lightly. her hands move to tzuyu's waist, nails scratching against skin as she hikes tzuyu's shirt up.

it's enough to make tzuyu squirm as she tries to keep her arms above her head, brows furrowed tight.

dahyun palms her over her bra and she lets out a whimper. her back arches immediately, curving into dahyun.

“you like this?”

dahyun pushes the fabric up higher and pinches a hardened nipple, before running over it with her thumb. tzuyu yelps in response, shoulders shrinking as her body twists. her hips rise instinctively, but dahyun keeps her down.

tzuyu has never been vocal in bed, not past those quiet sounds that leave the back of her throat, and dahyun has never minded it – though, today seemed like the perfect day to try something new.

“you're breathing so hard… and we haven't even done anything,” dahyun muses.

she drags her other finger between tzuyu's chest, then over the dips of tzuyu's ribs as it tenses under her touch. tzuyu's shirt is bunched up at her collarbone, so dahyun can only imagine it's even more suffocating for her than usual.

“you want me to touch you that bad?”

she's not one to tease this much, but she lets it roll off her tongue anyway, and watches tzuyu's reaction.

tzuyu's pulse races beneath her fingers, skin on fire.

dahyun leans forward, tilting tzuyu's chin towards her, coy and calculating.

“you want unnie to use you?”

tzuyu stiffens under her.

for a moment, dahyun's afraid she might’ve said the wrong thing. she's ready to drop it all and apologise –

but then tzuyu nods, eyes pleading, stomach undeniably clenching under her.

dahyun raises a brow.

“you're so filthy, tzu.”

tzuyu doesn't deny it; only ruts her hips in an effort to draw dahyun's attention there.

“be patient.”

she whimpers when dahyun presses a thumb on the edge of her lips, and opens her mouth instinctively.

dahyun drags the pad of her thumb across tzuyu's bottom lip before she knocks her nail against tzuyu's teeth.

“suck.”

tzuyu takes her finger into her mouth obediently. her gaze strays, embarrassed, but a moan still escapes and her eyes still flutter when dahyun pushes her thumb deeper, opening her mouth wider.

dahyun would ask tzuyu to keep her focus on her, but she can't help being a little soft when tzuyu sounds this good.

“you make all these pretty sounds, all for me,” dahyun drawls.

she pulls her finger out, along with the drool dripping down her palm and tzuyu's cheek.

“why don't you tell me what you want with words?”

“unnie…” tzuyu huffs, slightly out of breath.

dahyun sits back intentionally. “i don't mind waiting.”

tzuyu, however, with her jaw hung open, eyes hazy – she might just be a little impatient now.

“touch me,” she mewls, pitch high with equal parts of shyness and desperation.

“what's the magic word?” dahyun hums. she rests a hand on tzuyu's chest, rubbing her drool-coated thumb over the sensitive nub. “i want you to beg, baby.”

tzuyu almost sobs. she arches into dahyun and lets out a choked moan as dahyun's mouth finds her other nipple, licking and lapping languidly. a steady wave builds in her tummy, and it's terribly hard to ignore when dahyun is sitting right on her.

“please– please touch me down there, hyunnie,” tzuyu cries. “i'll be good, i'll keep my hands up, you can use me, please, unnie, just don't wanna cum like this–”

there're tears welling up in her eyes now so she squeezes her thighs together, trying to find some friction but also trying to stop herself from coming so unsatisfyingly.

thankfully, or maybe not so thankfully at all – tzuyu really isn't in the headspace to decide – dahyun stops right when she's on the verge of falling apart.

“that's my girl,” dahyun coos. tzuyu sounds wonderful.

she licks her lips, then her fingers; then she's off, pulling tzuyu's sweats down.

“legs open, pretty.’

tzuyu listens without hesitation. dahyun settles in between her thighs.

she leaves tzuyu's underwear on, watching the damp spot slowly forming on the fabric. tzuyu's incredibly soaked through, her lust and desire painfully prominent even if she refuses to voice it without prompting.

dahyun presses the pad of her middle and index finger on the spot, teasing. “what a mess…”

tzuyu flinches instinctively. her entire body jolts upwards with a whimper when dahyun rubs up to her clit over the cloth, smearing her arousal. her arms fall below her head unconsciously, naturally seeking to pull dahyun closer despite being bound.

dahyun clicks her tongue and retracts her touch. “what happened to keeping your hands up?”

tzuyu whines at the loss. “unnie, please…”

“you're so desperate to be used you can't even go one second without whining?”

tzuyu swears she could cum from dahyun's voice alone at this point.

she has half a mind left to raise her arms again, mumbling brokenly in between. “s-sorry, but please.”

dahyun's expression softens – she's never been good with apologies – but she sets the thought aside, keeping tzuyu's initial request in mind.

normally, she wouldn't wait a second to pleasure tzuyu, but a little edging now and then never hurt anyone, did it?

she moves her fingers back to tzuyu's centre, sneaking below the fabric. dahyun sucks in a breath at the warmth engulfing her hand, but focuses on rubbing small circles over tzuyu's clit. tzuyu practically melts, throbbing with every touch and coating dahyun's fingers with wetness.

her digits slide almost effortlessly against tzuyu's heat, coaxing out quiet moans.

when the sounds heighten, growing into whimpers, dahyun knows it's time to slow down.

“you're gonna cum without asking?”

the cries leave tzuyu's mouth so easily after that.

“ah– unnie, please please please, let me...”

if her hands weren't tied together, she would be tugging on dahyun's wrist herself, but all she can do now is beg.

“please, i'm close…”

dahyun smiles, satisfied. she dips into tzuyu’s heat again, and this time, she doesn't stop rubbing until tzuyu cums.

she speeds up when tzuyu starts moaning and furrowing her brows, knees folding into dahyun and stomach clenching.

tzuyu pants heavily, thighs shaking and trembling as dahyun continues dragging out her high, spreading her slick all over. her bounded wrists are red and aching by now, and she honestly can't wait to be untied so she can finally put her hands on dahyun.

once she’s caught her breath, she peeks under her hooded eyes, expecting dahyun to come up and release her.

though, dahyun seems to be thinking about other things.

she clicks her tongue, showing tzuyu her hand. “look at how filthy you are.”

her fingers are webbed up with tzuyu’s clear arousal, sticky and warm, and it makes tzuyu’s cheeks flush. dahyun peels her ruined panties off, slathering her cum over her skin as she goes.

without warning, she dives in again, licking up tzuyu's folds and collecting the arousal greedily. tzuyu squeaks, still feeling the oversensitivity from her previous orgasm.

“unnie–! wait–”

dahyun ignores her pleas and spreads open her clamped thighs cruelly. usually, she would check in first, knowing tzuyu didn't have much stamina when it came to this – but she simply couldn't wait. maybe all that being mean was getting to her head, because now all she wanted to do was listen to tzuyu cry her name all night.

she presses the tip of her tongue against tzuyu's clit before pushing it flat, then sucks gently. tzuyu's back grows taut, arching off the bed sharply. she mumbles out a cacophony of unnies and pleases, every other word long forgotten the moment dahyun laid her mouth on her.

when dahyun's tongue finds her clit again, lapping slowly, she cums almost immediately.

“hyunnie,” tzuyu puffs out weakly, chest heaving. it's so soft that she's not sure dahyun can even hear.

she hides her face under her bicep, unable to keep her arms up straight anymore. tears stain her skin, all messy and wet and limp.

dahyun comes up to capture her lips in a comforting kiss, melting into one another despite the lewd undertones of saliva mixing with slick.

tzuyu thinks its the end of it when dahyun takes hold of her wrists, but instead of untying her, dahyun pushes them into the sheets once more.

“wh– ”

she's cut off by a vibration.

their eyes dart to the sound from dahyun's phone, but neither move.

dahyun keeps her hands on tzuyu's and retrieves her phone with the other.

“it's sana unnie,” she announces.

tzuyu lets out a sigh, happy to have found an excuse to catch her breath.

for some reason, dahyun doesn't get off her.

rather, she leans down to kiss tzuyu's tears away, and her grip tightens.

“give me one more,” she whispers.

“i-i can't… and s-sana unnie…”

dahyun picks up the call and tosses the phone aside. it's right up tzuyu's alley.

“hello? dahyunnie!” sana's voice rings.

dahyun keeps her voice steady. “hey, sana unnie. did you need something?”

as she speaks, her fingers trail down tzuyu's tummy, pressing her palm over the base of it.

tzuyu mewls, centre throbbing all over again. she bites down on her bottom lip harshly, brows twisting in a meagre attempt to keep quiet.

“i was just wondering if you and tzuyu wanted to come over tonight to watch the seollal fireworks together. is tzuyu there?” sana chirps.

dahyun smirks, sinful.

“is tzuyu here?” she echoes. her fingers slip between tzuyu's folds, prodding in.

tzuyu whimpers softly, rutting her hips.

she knows she could mouth the words, shake her head once, and dahyun would get off without hesitation; knows that the knot bounding her is loose enough to be slipped off herself – but she also knows she's terribly turned on now, even if she's sensitive all over, and that there's a part of her desperately begging for dahyun to keep going with sana listening.

“y-yes, i'm… here,” she manages, albeit a little high pitched and broken.

there's a pause on the other line, then sana speaks again. “are you two… are you sick, tzuyu?”

as tzuyu thinks of a response, dahyun thrusts two fingers into her slowly, then out again. tzuyu shivers and turns her head into the mattress in a panic, words lost in low moans.

“hello?” sana asks again.

dahyun is merciful enough to help.

“she's okay, just… distracted.”

“ah,” sana muses, sounding a little coy herself. knowing her, she's probably already guessed. “enjoy yourself, tzuyu. call me back?”

it doesn't take long to bring tzuyu over the edge again, not after hearing sana say that – another thrust and a curl of dahyun's fingers, a practised thumb to her clit – tzuyu cums a third time with a silent scream, cracked whimpers escaping her throat.

“stop, stop,” she sobs quietly, tears blurring her vision.

dahyun lets go of her hands instantly and carefully pulls her drenched fingers out.

without even bidding goodbye, she hangs up the call and returns to tzuyu's side, untying the silk. though, tzuyu's too exhausted to do anything but lay limp in the same position.

“was that too much?” dahyun asks, worried.

she rubs up and down tzuyu's stomach soothingly, trying to ease her oversensitivity.

tzuyu lets her eyes fall close, enjoying the relief dahyun was providing.

“three times… is enough,” she mumbles.

dahyun wipes her tears away with the back of her hand. “did i push too far? are you okay?”

tzuyu shakes her head. her chest rises and falls comfortably, and her mind feels like it's on a warm, velvety cloud.

“i liked it,” she assures. she brings her hand to dahyun's cheek, guiding dahyun in for a proper kiss.

dahyun continues planting kisses all over her face, even as tzuyu loses the focus to maintain the kiss. she runs a thumb over her hairline, brushing the hair out of tzuyu's sweaty forehead.

“does that mean i did well?”

“really well,” tzuyu smiles dreamily.

she ducks her head, only then noticing the mess she made on dahyun’s fingers and their sheets.

“i probably need a shower…”

“i’ll help.”

“ah, no,” tzuyu protests.

they've never been able to keep their hands off each other in the shower, and she doesn't think she can handle a fourth time, especially not standing up. she’ll have to make do with this drowsiness if she doesn't want to wake up with sore muscles tomorrow.

“i’ll shower; you change the sheets.”

dahyun traces teasing circles over tzuyu's waist. “i'll be good.”

“you won't.”

“but you like it when i'm a little mean, no?

tzuyu comes out of the shower sweatier than when she got in.

she runs through her skincare as dahyun changes the sheets, and once that's done, she flops down carelessly, legs sore. she doesn't know where dahyun gets all this energy.

dahyun chuckles, patting tzuyu's thighs. “up, i'll dry your hair.”

tzuyu sits up begrudgingly. dahyun comes behind her with a blow dryer and her towel.

the gentle whirring of air on top of dahyun's fingers through her hair lolls her right back to sleep.

she's awoken by another call to dahyun's phone, but doesn't stay alert long enough to listen in.

she's told it's sana when dahyun leans over to whisper into her ear – “do you still wanna go over to sana unnie's?”

tzuyu stirs a little at the name. “... do you think sana unnie could tell? just now?”

dahyun pats tzuyu's hair down comfortingly. “probably. she just joked about joining us.”

tzuyu groans and lies into dahyun's front, slightly distraught. “i'm too embarrassed to go.”

dahyun laughs, but doesn't try to convince her otherwise. she puts the phone back to her ear.

“i think we'll sit out of this one, unnie. we'll visit tomorrow, i promise – sorry again!”

dahyun is quick to end the call; or maybe sana still thinks they're doing things – tzuyu isn't keen to find out.

“you liked it, though. didn't you?” dahyun teases, after she's hung up. “maybe we'll take sana unnie up on that offer, hm?”

she kisses the spot under tzuyu's earlobe, and tzuyu goes red all over again.

she decides she doesn't quite have the energy to entertain that thought –

not yet, anyway.

oh this was a roller coaster to write from start to finish -- i wrote it over so many different sessions i kept getting lost in whatever minimal plot i set for it <3 i think everyone can probably guess my fav datzu smut tropes by now.. i am just a girl 😞 top!tzu has not been forgotten, i promise! i hope you enjoyed this chaepookie, thank you so much for waiting 🫂

anyway, thank you for reading, and thank you for interacting!! i appreciate it so much <3

#twice imagines #dahyun x tzuyu #datzu #twice smut #chou tzuyu #kim dahyun #twice fics #title: shot clock by twice #idk how much more smut i have left in me yall.. my next fic will be fluff...... unless something possesses me #i truly am not cut out for this #happy valentines day?????????

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