Floor 23
this is my first fic lmk what you all think!!
pairing:Β bucky barnes x stark!reader (Y/N) word count:Β ~4k summary:Β Y/N Stark was taken by Hydra at nine years old and experimented on β now she's back, powered, confident, and moving into Avengers Tower with a past no one quite understands. She shares a floor with Bucky Barnes, the quiet super soldier who trains her, teases her, and looks at her like sheβs more than just a ghost from her fatherβs past. Thereβs no angst β just slow burn tension, found family, super speed reveals, rooftop heart-to-hearts, spicy training montages, and one very unforgettable Stark party. warnings:Β canon-typical violence, spicy content (18+), mentions of past trauma (Hydra), suggestive language, emotional vulnerability, fluff, smut (clearly marked), soft!bucky, strong!Y/N, comfort a/n:Β this one is for the girlies who love the classic avengers dynamic, protective men with metal arms, and casual girls with quiet strength. this is a no-angst zone <3 timeline:Β post-Ultron AU, everyone lives, everyoneβs hot.
The Avengers had faced world-ending threats. Aliens. Armies. Interdimensional rips in time.
But somehow, nothing had ever shut them up quite like Tony Stark saying the words:
βSheβs my daughter.β It wasnβt a punchline.
He stood in the center of the common room, coffee in hand, jaw set just a little too tight.
βShe was taken when she was nine. Hydra,β he said. βThey used her to get to me. And I didnβt even know.β
The silence in the room was sharp. Uncomfortable.
βI found her six months ago. It took this long toβ¦ get her out. Fully. Legally. Safely. And now sheβs coming here.β
βTo live?β Steve asked gently.
βTo stay,β Tony said. βIf she wants to.β
Before anyone could process that, the elevator doors chimed.
And thenβ She stepped in.
Y/N Stark didnβt walk into the room like someone being reintroduced to a world that forgot her. She walked in like she already knew everyone was looking and didnβt mind one bit.
Faded jeans. Converse with ink scribbled on the rubber. A cropped navy hoodie with βStark Industriesβ printed in lowercase across the chest. Her duffel was slung over one shoulder, a beat-up set of wireless headphones hanging from her neck.
The first thing she said?
βSo this is what happens when you ghost your dad for eleven years. He gets famous, builds a robot army, and moves in with Captain America.β
Sam cracked a smile.
Tony exhaled. βYouβre late.β
βIβm not late,β she said, stepping further into the room. βYou just started early.β
Then she stopped in front of him, dropped her bag to the floor, and looked him in the eyes.
Tony looked back.
A moment passed.
Then he opened his arms.
βCome here, kid.β
She didnβt hesitate. Not even for a second.
She walked right into him and let his arms close around her shoulders like theyβd done this a hundred times beforeβeven though they hadnβt. He held her like he wasnβt sure heβd ever get another chance. She didnβt cry. She didnβt freeze. She just leaned in and rested her chin against his shoulder and said, βYou owe me like ten birthdays.β
βI owe you everything,β he muttered back.
When they pulled apart, Tony turned to the rest of the team like he was seeing them for the first time. βEveryone, this is Y/N. Sheβs funny, smarter than me, probably stronger than me, and knows how to pick a lock with a paperclip. Be nice.β
Thor was the first to approach, all broad shoulders and unshakeable friendliness. βYou are much smaller than I expected.β
βAnd youβre taller,β she replied, βbut only vertically.β
Thor blinked. Then let out a booming laugh. βI like her!β
βSame,β said Natasha, giving her an approving once-over. βYou talk like him, but less annoying.β
βGive it time.β
Steve smiled, offering his hand. βWelcome to the Tower.β
Y/N took it. βThanks. Itβs a bit cleaner than Hydraβs decor.β
Silence.
She didnβt flinch. βSorry. Was that too soon?β
βNo,β Wanda said softly. βNot too soon. Just honest.β
Y/N gave her a real smile at that.
It wasnβt long before the group fell into easy conversationβTony explaining her powers vaguely, Sam asking if she could fly (she couldnβt), and Bruce appearing from the lab just long enough to give her an awkward wave and say, βGlad youβre here.β
Only Bucky didnβt say anything.
He stood a little off to the side, arms crossed. Watching.
Y/N met his gaze once. Didnβt look away.
He didnβt either.
Later That Day β Floor 23
Y/N followed her dad through a private elevator with βStark Access Onlyβ engraved into the panel.
βI built this floor for you a while back,β Tony said, unlocking the door. βBefore I even found you again. Justβ¦ in case.β
Y/N stepped inside. The suite was wide and open, warm wood floors and oversized windows spilling afternoon light across the couch and bookshelves. One hallway led to a bedroom. Another led to a second door.
βWhoβs in there?β she asked.
Tony scratched the back of his neck. βTechnicallyβ¦ your neighbor.β
βTechnically?β
βYouβre sharing the floor with Barnes.β
She turned to face him.
βYouβre telling me that after eleven years in a Hydra lab, youβre putting me next door to the Winter Soldier?β
Tony held up both hands. βHeβs different now.β
βSo am I.β
βThatβs why I think it might work.β
She stared at him.
βIβm not saying you have to like him,β Tony added. βBut I trust you. And honestly? I think he could use someone who isnβt afraid of him.β
As if summoned by awkward timing, the other suiteβs door opened.
Bucky Barnes stepped out. Hoodie. Sweats. Barefoot. He looked like someone whoβd just woken up from a nightmare and found out he still had to be awake.
Y/N didnβt move.
Neither did he.
Tony gave them both a quick wave. βAlright. Iβm gonna go back to the lab and pretend this isnβt the weirdest thing Iβve ever set up. Play nice, you two.β
The door closed behind him.
Y/N shifted her weight, casual but alert. βSoβ¦ weβre roommates. Thatβs hilarious.β
Bucky crossed his arms. βNot roommates. Same floor. Two doors. Big difference.β
βNoted,β she said, stepping past him. βI call the good window.β
He said nothing. Just followed her with his eyes as she hauled her bag toward the bedroom.
When she opened the door and saw the soft lighting, the clean bed, the empty bookshelvesβher chest ached in a way she didnβt show.
From behind her, Bucky said quietly, βYou need help?β
She turned, eyebrow raised. βWith what? Lifting emotional baggage?β
His lips twitched. Just barely.
βIβm good,β she added. βBut thanks.β
And she meant it.
Y/N woke up to the muffled hum of the city far below, filtered through the massive windows of her new room. The sunlight spilled softly across the floor, illuminating the little mess sheβd made unpacking. Her jeans were draped over a chair, the duffel bag left unzipped near the bed, and a half-empty bottle of water was perched on the nightstand next to an old Stark Industries baseball cap. She was still adjusting to howβ¦ normal it felt. That is, until the quiet ping from the intercom reminded her she wasnβt alone here. βGood morning, Miss Stark. JARVIS is online and awaiting instructions.β Y/N grinned, swinging her legs over the bed. βHey, J. How long have you been waiting?β βSince you last disconnected at approximately 3:42 a.m.β She rolled her eyes. βNight owl, remember? Anyway, bring up my playlist and put on something chill. And maybe order some breakfast? You know, human things.β βAs you wish.β For the first time in a long time, Y/N felt like she could breathe. She liked it. Not just the tech, the luxury, or even her dadβs presence. But the quiet acceptance of a place that didnβt feel like a cage. Later that morning, after a breakfast JARVIS insisted was βbalanced and Instagram-worthy,β she headed out of her room to explore. She bumped right into Bucky Barnes in the hallway, arms full of random boxesβsome labeled βFragile,β others just scribbled βY/Nβs Stuff.β βYou again,β she said, raising an eyebrow. He shrugged. βThought you might want help.β βPlease.β He smirked, setting the boxes down. βIβm kidding. Thought youβd say no.β βIβm good,β she insisted, but he could see through it. The truth was, she didnβt like asking for help. Hydra had taught her independence was survival. But here? She was learning to lower her walls. Together, they moved the boxes into her room, and he stayed long enough to assemble a chair and hook up her gaming console. βDonβt think I wonβt destroy you at βStreet Fighter,ββ she warned. He laughed softly, a sound that didnβt reach his eyes. βIβm counting on it.β That evening, the team gathered in the common room for their usual downtime. Steve was telling a story about the old days, and Thor was rummaging through the snack cabinet in search of Pop-Tarts. Y/N sat near the edge, quietly observing, when Sam nudged her. βYouβre kinda quiet for a Stark.β She smirked. βIβm justβ¦ sizing you all up. Youβre weird.β βFair.β Natasha gave a knowing look. βYouβll fit right in.β βOnly if I can steal your stuff in the fridge,β Y/N quipped, earning a small smile from Nat. Bucky caught her eye from across the room and raised an eyebrow. She shot back a teasing grin. The comfortable banter was a new feeling for her. Like this strange, found family was exactly where she belongedβeven if she wasnβt ready to say it aloud yet.
One afternoon, the Avengers were hanging out on the Towerβs rooftop garden, trying to enjoy a rare break. Steve and Bucky were reminiscing about missions past, Tony was tinkering with a gadget, and Wanda was quietly meditating near the flowers. Y/N leaned against the railing, scrolling on her phone. Suddenly, Steve threw out a challenge. βAlright. Who thinks theyβre fast enough to beat me and Barnes in a race?β Bucky smirked. βYouβre on, Cap.β Tony looked over from his workbench. βThis is gonna be good.β The team quickly gathered at the starting lineβa strip of rooftop lined with potted plants and benches. Y/N stood to the side, arms crossed, amused. βDonβt leave her out,β Sam said. βShe looks fast.β Steve glanced at her. βYou wanna try?β Y/N shrugged with a grin. βWhy not? Iβm already here.β The countdown started. βReady?β βSet?β βGo!β Before anyone could blink, Y/N was gone. A blur of movement that left Steve and Bucky staring, mouths slightly open. She was halfway to the finish line before Steve and Bucky had even taken their first strides. βIs sheβ?β βFaster.β Y/N crossed the finish line, slowing to a casual walk as if sheβd just taken a stroll. Tony whooped from the sidelines. βThatβs my kid!β Steve and Bucky trailed behind, breathing hard, eyes wide. βI didnβt see that coming,β Steve admitted, shaking his head. Bucky wiped his brow. βYeahβ¦ sheβs faster than either of us.β Y/N grinned, brushing a lock of hair from her face. βYou guys okay back there?β Sam laughed. βYou just beat two supersoldiers like they were standing still.β Y/N shrugged. βGuess Iβm not just a Stark.β Wanda approached, impressed. βThat was incredible.β Y/N shrugged again, but the smile was soft. No one knew the full extent of her powers yet. But maybe, just maybe, they were starting to. Y/N was starting to realize that living in Avengers Tower wasnβt nearly as chaotic as she expected. Or maybe she was just getting used to the chaos.
Her mornings were still slow, with JARVIS gently nudging her awake by dimming the lights and playing her favorite soft tracks. The AI had developed a knack for reading her moodsβif she was cranky, JARVIS lowered the volume; if she was restless, heβd suggest a walk on the roof.
βHey, J,β she said one afternoon as she sat cross-legged on her bed, scrolling through mission reports on her tablet. βYou ever get tired of being perfect?β
βI do not experience fatigue in the human sense,β JARVIS replied smoothly. βBut I do enjoy your sarcasm. It keeps things interesting.β
Y/N smiled. βWell, donβt get used to it.β
Later that day, she found herself wandering into the common room just as Bucky was finishing up his morning workout. He looked up, hair damp and muscles still moving from exertion.
βHey,β she greeted, dropping onto the couch a little too casually.
He gave a tired smile. βHey.β
For a moment, neither said anything. Then Y/N reached into her bag and pulled out a half-eaten granola bar.
βWant half?β she offered.
Bucky raised an eyebrow but didnβt refuse. βSure.β
They shared the bar in comfortable silence.
βYou donβt talk much,β Y/N observed.
βDepends on the day.β
She nodded. βMe too. Hydra taught me a lot about silence.β
βYeah?β
βSometimes itβs the only thing that keeps you alive.β
Bucky looked at her then, really looked. βYouβre different than I thought.β
βDifferent good or different bad?β
He smiled, small and genuine. βDifferent good.β
That night, she joined the group in the kitchen. Wanda and Natasha were debating the merits of spicy food versus comfort food.
βNatasha canβt cook,β Wanda said, rolling her eyes.
βShe burns water,β Natasha shot back.
Y/N laughed. βSounds like youβre in good company.β
Wanda looked over at Y/N. βYouβre fitting in fast.β
βOnly because Iβm sneaky,β Y/N teased. βAnd because you guys are actually decent.β
Tony popped his head in, holding a tray of cookies.
βTry these. Iβm taking credit for all of them.β
Y/N took a bite. βNot bad, old man.β
The warmth of the kitchen, the laughter, the messβit was the first time in a long time Y/N felt like she could be herself without armor.
Later, she caught Bucky in the hallway.
βTraining again?β she asked.
βYeah,β he said. βYou wanna join?β
Y/N smirked. βYou trying to show off?β
βMaybe.β
βChallenge accepted.β
As they moved to the training room, Y/N felt something shift. She wasnβt just Tony Starkβs daughter anymore. She was Y/N. Stronger. Ready.
Tony Stark throwing a party was a bit like a fireworks display β bright, loud, and impossible to ignore. And when the occasion was his daughter finally stepping back into the world heβd built, well, you knew the Tower would be overflowing with Avengers, allies, and anyone with a good excuse to sneak in. Y/N stepped out of her room on Floor 23, already wondering if she could survive a night surrounded by Tonyβs βfriendsβ β people she mostly knew by reputation or by what her father had described in rushed phone calls that were more apologies than explanations. The music was loud, the kind of pulsing, electric mix that made the floor vibrate under her boots. She felt a familiar zing of nerves but also a strange warmth, like maybe this was the kind of chaos she could get used to. Tony was in full dad mode, wearing sunglasses indoors, holding a drink, and running around making sure everyone had what they needed. βY/N!β he called from the kitchen. βYou made it. Come meet the important people who matter.β She smirked. βYou mean the people who kept your tech from self-destructing?β He laughed, waving her over. The crowd was a mix of familiar faces and new ones. Steve was charming someone near the buffet, Thor was explaining something about Pop-Tarts to an increasingly confused Sam, and Natasha wasβ¦ well, Natasha was leaning against the wall, looking unimpressed but secretly enjoying herself. Bucky stood near the edge of the room, arms crossed, eyes on Y/N like she was a flame he couldnβt quite look away from. Y/N caught his gaze and gave a small, playful raise of her eyebrow. Tony nudged her. βGo on. Say hi.β She stepped forward and bumped into Sam, who grinned. βHey, Y/N. Heard about your superspeed.β Y/N shrugged. βItβs a good party trick.β Thor suddenly approached, holding a plate stacked high with Pop-Tarts. βYou must try. They are delicious.β Y/N took one, bit it, and made a face. βToo sweet. Iβm more of a black coffee and sarcasm kind of girl.β The night rolled on in a haze of laughter and storytelling. Y/N found herself drawn to the quieter corners, and somehow that always seemed to lead back to Bucky. Finally, the music shifted. A slow, steady beat filled the room. Tony clapped his hands. βAlright, everyone! Dance time. And yes, Y/N, you have to dance. No excuses.β Buckyβs eyes found Y/N again. He took a step forward. Y/N smirked but didnβt move away. βDance with me?β he asked quietly. The room seemed to blur. She nodded. They moved to the center of the floor, the noise fading into the background. Buckyβs hand found hers β steady, sure. Y/N let herself relax against him. For the first time since she arrived, she wasnβt the daughter of a genius billionaire. She was just Y/N. And Bucky? He was more than the Winter Soldier. He was something soft and real. The music slowed, and so did their breathing. No words needed. Just the quiet certainty of a dance, a glance, and the start of something new. The party had settled into a hum of laughter and scattered conversations when Y/N found herself standing in front of Buckyβs door.
She hesitated for a heartbeat.
Then knocked.
Bucky opened it, his usual guarded expression softening the moment she stepped inside.
The room was dimly lit, personal, with photos pinned to the wall and a guitar resting in the corner.
Y/N glanced around and then up at him.
βNice place,β she said, kicking off her boots.
βYeah,β he said quietly. βItβs home.β
They settled onto the couch, not quite touching but close enough that silence felt natural.
βIβm glad you asked me to dance,β Y/N said after a moment.
Buckyβs eyes met hers. βMe too.β
They talkedβslow, easy conversation about things neither usually said out loud.
Her voice softened when she spoke about Hydra, about being gone for so long.
He shared quiet stories about his past, about finding purpose again.
No pressure. No grand declarations. Just two people finally letting their walls down.
When Y/N leaned her head on his shoulder, Bucky didnβt pull away.
For once, the night was theirs. Then he kissed her like heβd been waiting β like every missed glance, every sparring match, every smirk had been building to this. She kissed back like sheβd been searching for something and just found it. There was no hesitation anymore.
His hands slid slowly, reverently, around her waist, drawing her in until she could feel his heartbeat against her own. Her fingers found the edges of his shirt, tugging it upward, and he let her. Their mouths never left each other as the fabric disappeared piece by piece. Her hands roamed over his chest, feeling the heat of him, the scar tissue, the muscle β and he let out a quiet groan against her neck that made her heart stutter.
She whispered his name and he froze, forehead pressed to hers. βTell me to stop,β he rasped, voice strained.
βI wonβt,β she breathed. βDonβt even think about it.β
And that was all it took. He kissed her again, harder this time, walking her back until she hit the mattress and fell into it with a soft thud. He followed, his body blanketing hers with warmth and tension and need. Every movement was deliberate, every touch a conversation. There was a tenderness in the way he peeled away her layers, kissing the skin he uncovered, trailing his lips along her collarbone, her shoulder, her chest β and when her shirt was gone, he just stared for a second, eyes soft and hungry all at once.
βYouβre beautiful,β he said, barely a whisper.
She pulled him down by the necklace at his throat. βThen do something about it.β
They moved together like it had always been inevitable β months of tension unraveling all at once. He took his time, mapping her body with hands that had only known violence and now wanted to memorize softness. She arched into him, breath hitching, head thrown back, and the way he looked at her made her feel like she was the only thing in the world that mattered.
When he finally pushed into her, slow and deep, she gasped his name. He kissed her temple, her jaw, her lips β every part of her he could reach β while they found a rhythm that felt like coming home. It wasnβt rushed. It wasnβt clumsy. It was honest, raw, and overwhelming in the best way. Her nails dragged across his back, his grip tightened on her thigh, and their bodies moved like theyβd done this a hundred times in dreams.
And when she came undone beneath him, head buried in his shoulder, he wasnβt far behind, whispering her name like a prayer.
They lay tangled in the sheets afterward, chests heaving, slick with sweat and barely touching because it was too much and not enough.
He pulled her against him, pressing a kiss to her hair. βYou okay?β
She looked up, cheeks flushed, eyes bright. βMore than okay. You?β
He smiled β a real one, rare and warm. βYeah. You ruined me.β
She laughed softly, burying her face in his chest. βGood.β
The next morning, the training room buzzed with energy.
Y/N was already warming up when Bucky walked in, a determined look on his face.
βReady to get your ass kicked?β he teased.
βOh, youβre on,β Y/N replied with a grin.
What followed was an intense, breathless hour of drills, sparring, and sprinting.
Bucky was relentless, pushing her to her limits.
Y/N matched him move for move, her powers giving her an edge, but Buckyβs experience kept her honest.
They laughed through the exhaustion, exchanged sharp jabs of sarcasm, and shared those fleeting glances that meant more than words.
At one point, Y/N surprised him by pulling off a move he hadnβt seen coming.
He shook his head, impressed. βOkay, Stark. Youβre full of surprises.β
She smirked, wiping sweat from her brow. βYou have no idea.β
By the end, they were both dripping, breathless, but the atmosphere was electric.
Theyβd tested boundariesβnot just physical, but emotional.
And neither wanted to stop.
In the days that followed, Y/Nβs presence became a new constant.
She joined Natasha and Wanda for late-night strategy talks, offering sharp insights and a steady voice.
With Steve and Sam, she ran drills and shared stories from her years in hiding, slowly earning their respect.
Tony hovered in the background, proud but trying not to smother.
JARVIS was her unofficial partner in crime, managing everything from playlist curation to subtle tech pranks.
Bucky found himself often at her side, whether it was cooking disasters in the kitchen (courtesy of Natashaβs famous inability to cook) or quiet walks on the rooftop.
During one particular evening, Y/N and Bucky caught Thor debating the merits of Pop-Tarts versus pancakes in the dining hall.
βPancakes are fluffier,β Y/N argued, crossing her arms.
βBut Pop-Tarts are eternal,β Thor insisted, brandishing a tart like a weapon.
Bucky chuckled. βIβll take the fluff, thanks.β
The team laughed together, sharing moments that werenβt about missions or powers but about being a family.
Y/N realized that even after everything sheβd been through, thisβthese peopleβwere her home now.













