Work Text:
Osamu opening their store in Osaka instead of Amagasaki might seem small on paper, but it actually meant the world to Atsumu. Amagasaki wasn't small, Osamu would have decent business there just as much as in Osaka, and even if the train ride was short, they would have been closer to their parents there than they were now. However, this now meant Osamu owned a small shop with a shockingly decent sized apartment above, only 10 minutes from the MSBY training center. So, every single day after training Atsumu could go there instead of rushing home. Every single day she would get a meal cooked by her twin, sit at the bar counter and talk her twin’s ear off about training, about what other players annoyed her that day and about how glad she was Osamu was there to listen.
And despite all the annoyed grunting and ‘leave my restaurant, ya scrub’ shouts, Osamu always listened. They listened to Atsumu talk and talk and continued making her onigiri even when they said it was getting out of hand, and she would need to start paying.
“Could pay ya in other ways, ya know,” Atsumu had joked the first time Osamu presented her with the threat, winking at her twin and chuckling at the fake offended response that got her. That night Osamu had fucked her so hard Atsumu saw stars like never before.
“Yar extra hungry today,” Osamu commented, watching her sister eat a double portion of tuna origini that they had just made. The store was empty, it was late on a weekday, just a couple minutes before closing.
“Rough day,” Atsumu replied in between bites, ignoring how Osamu looked at her for chewing with her mouth open. “Coach fucking hates us or sm’thing.”
Osamu hummed at that. “Ya know, eating double will cost ya more.”
She only raised an eyebrow at that. Osamu had started ‘making her pay’ after every dinner she ate at the shop for free. After finishing her food and talking Osamu’s head off, Atsumu would always grab her things, head upstairs to Osamu’s apartment, take a long and thorough shower and then wait for her twin to come back up after closing the store to do whatever they wanted to her.
“What do ya want then?” Atsumu asked. She had almost finished her meal, curiosity now peaked.
“I have a bunch of bookkeeping to go through tonight,” Osamu said, leaning back against the wall behind her and eyes narrowing in on their sister who was just finishing her meal. “Ya should let me sit on ya face while I do it, don't ya think?”
Atsumu choked on the last bit of rice in her mouth. They had never done that before. Both, sex in any of the store related spaces, and face sitting. It wasn't that Atsumu was opposed to it in any way, she was mainly scared of doing it wrong. And it didn't help that Osamu usually preferred to top. As much as they joked about Atsumu being a pillow princess, whenever she did suggest doing anything else Osamu usually waved her off.
“Yeah, yeah, I know the princess is above eating pussy,” Osamu muttered, continuing to wipe down the stove and counter in front of them. “Don't worry, I had a better idea.”
Atsumu was going to protest, was going to tell them she was not above doing that at all, it just usually didn't work out for them, but Osamu gave her a look that screamed ‘Don’t argue with me today’ and even she knew by now when to pick her battles.
20 minutes later Atsumu was kneeling in front of Osamu’s office chair in the back of the store, looking around the cramped space Osamu used for bookkeeping. She had only been instructed to wait there, naked, right between the desk and the chair, on her knees and to not touch anything. For once in her life, she had chosen to listen.
Her clothes were thrown in a pile in the corner and her knees were scraping against the wood floor in a way that made her thankful she wore knee protectors during training usually. Her teammates had caught on that she was seeing someone a long time ago. As much as they tried to be careful, the occasional bruise or hickey was left, and it was hard to hide when playing a sport professionally. But they had also somewhat accepted that Atsumu wanted to keep that private. However, she was sure if she would start showing up with bruised knees, it would start the gossip all over again.
Osamu came in not much later, carrying two folders of papers, as well as a small black bag. They sat the folders down on the table before crouching down to Atsumu. “Ya listened for once, good girl.”
The praise made a shiver run down her back and her eyes fluttered shut for a moment. Osamu always told her she was too bratty for someone who liked praise so much, but she also couldn't help but backtalk her twin whenever she got the chance. She'd argue it was in her nature to contradict Osamu as much as possible.
“How are ya sitting on my face in this setup?” Atsumu asked quietly.
Osamu only smirked in response. “That's for later. For now however…”
She pulled something out of the bag. The first thing Atsumu saw was a pair of black handcuffs, the one they usually used. She put her hands out instinctively for Osamu to put them on.
“Behind yar back, baby,” Osamu chuckled. Atsumu listened again, moving her hands behind her back and letting Osamu cuff them together.
She watched as Osamu started pulling more things out. The first were noise cancelling earplugs. Atsumu was never sure if she hated or loved those. Sensory deprivation was a great experience usually, letting her focus entirely on the pleasure her twin was giving her, but she also hated not hearing them. She hated not having their voice in her ears at all times, talking down to her or praising her.
“Do we have ta use them?” She whispered.
Osamu hummed in response. “Ya owe me, remember?”
There was a small pause where Atsumu assumed they were waiting to see if she would safeword out. She didn't. So, Osamu opened the box and started adjusting the earplugs for Atsumu.
The silence became overwhelming immediately. Atsumu saw her twin say something, unable to hear any of the words. It looked something along the lines if ‘Good like this?’ so she simply nodded in response.
The next thing Osamu pulled out took Atsumu a moment to recognize. It looked like a double ended dildo with something attached in the middle. She narrowed her eyes at it, before realizing the middle bit was a strap to secure the dildo around something. A gag.
She could see them laugh as realization hit her. And then fingers were tapping her lower jaw for her to open up. Reluctantly she did.
The half of the dildo Osamu started pushing into her mouth was the smaller one, but it still hit the back of her throat, and she gagged a little. Osamu did not seem to care at all, instead pushing it deeper until the leather straps hit the side of Atsumu’s mouth.
What she had expected to come next was Osamu adjusting the gag around her face, but instead they grabbed the back of her head and pulled until she was fully looking up, neck stretched, and eyes fixed on Osamu.
Her twin was still wearing her work clothes, minus the apron, dark hair tied up and sweat covering her face. Atsumu felt like falling in love all over again.
Their other hand grabbed the gag again, and started moving it in and out of Atsumu’s mouth quickly, not waiting for her to adjust to the movements, instead just watching as Atsumu chocked around the dildo, body struggling against the hold Osamu had on it.
Just as Atsumu started feeling like it was too much, like she might actually throw up, Osamu stopped, grin plastered on their face as Atsumu looked up at them with teary eyes. She didn't cry quickly during sex usually, but gagging always seemed to do the trick and Osamu seemed to love triggering that in her.
They removed the dildo just enough to let Atsumu breath a moment, before pushing it back in and securing it tightly around the back of her head. Atsumu felt completely helpless. The cuffs behind her were digging into her skin (she couldn't tell if she wanted it to leave marks or not) and the earplugs took any sense of security Osamu's voice usually brought her.
Every movement she made the dildo in her mouth hit the back of her throat, and she tried her best to stay still, even as Osamu was shuffling next to her, grabbing some more folders from a shelf before - finally - moving towards the chair again.
Atsumu watched as they removed their pants and boxers, dropping them to their knees, before settling down on the chair in front of her. She knew what would come next, felt excited at the thought of it. Atsumu didn't top often, but whenever she did she was so overwhelmed by the need for her twin she felt herself going insane at just the thought of it.
Osamu's hand returned to the back of her head, playing with strands of her hair before guiding her forward. The tip of the dildo first hit their inner thigh before then properly brushing against their already wet pussy.
All Atsumu could see from this position was their pussy and lower stomach, dark hair moving up to their navel and thick thighs on both sides of her head. She tried straining her eyes to look up at them, but it barely worked.
Osamu shifted in the chair slightly to give Atsumu a better angle, before pushing her further. She watched as the dildo sank inside Osamu and suddenly Atsumu felt like she was going to heaven. She had never seen it so close, smelled her twin so close like this. Everything around her head had suddenly become Osamu. Part of her wished she could taste it, but instead she just kept watching until her face was all the way against Osamu's pussy and her eyes fell shut.
Without even properly thinking about it she started to move her head back, wanting to make them feel good. But the hand on the back of her neck stopped her and their thighs moved a little closer to keep her head in place.
Atsumu truly felt like she was in heaven.
The earplugs prevented her from hearing anything Osamu was doing (not like she understood any of the bookkeeping they had to do even when they tried explaining it). So instead, she simply focused on the few things she could. Osamu's smell was a mix of their usual cologne and sweat from a full day at work. Atsumu was not ashamed how much she liked Osamu's smell when she was sweaty, how much she liked how her girlfriend looked when she was like this and how badly she wanted to taste it. So she kept her eyes closed and focused on taking deep breaths.
Every now and then Osamu's hand would return to pat her head softly and she would slightly lean into their touch (as much as the gag allowed her to move). She had lost any track of time in this position and she could feel her head become fuzzier and fuzzier every second they kept going like that.
It had never been difficult for Atsumu to fall into subspace, but especially whenever she was forced to wait, to endure things for long periods of time she felt herself slipping completely.
By the time Osamu finally seemed to be done, Atsumu barely remembered where she was. All she was sure of was her twin's smell, the feeling of her thighs around her head and pussy against her face. It was enough for her.
Osamu, however, slowly moved her face away until Atsumu's tear stained eyes met theirs. They were smiling at her softly.
Without any warning they went to remove the earplugs, removing a little bit of the trance Atsumu had fallen into.
“Ya alright, baby?” Osamu hummed. Atsumu could only nod in response.
“I'm all done here, so now we can get to the fun part, huh?”
Once again, she only nodded.
“Here's the deal,” Osamu whispered, voice quiet but stern. “I'll give ya five minutes to do ya best to make me cum, if ya do I'll give ya whatever ya want after, that sound good?”
She felt her eyes widen and nodded.
“But if ya don't, I'll use ya face to make myself cum and yar gonna have to go to bed without getting anything yaself,” Osamu went on. “That sound fair?”
Atsumu agreed immediately. She was too far gone to realize how much of an unfair deal that was. Osamu had never in her life cum just from penetration. Neither with Atsumu, nor on her own, nor with previous partners. So, by that logic, Atsumu should refuse. She should point out how there was no way of her making Osamu cum with just the dildo in any amount of time. But she also was too far gone to realize that. So she agreed.
Osamu chuckled at that, grabbing her phone and showing Atsumu a 5 minute timer she had put. “Go on, pet, do your best.”
And she did. She immediately leaned forward again and started pushing inside her. The movements weren't much different to whenever Osamu made her suck her strap. In and out, trying to hit the spot inside Osamu every chance she got.
She could tell her twin was enjoying it, shaky breaths and low moans filling the room with every moment. But she could also tell she wasn't getting them to the edge. Every moan that left their lips slurred her on further while at the same time reminding her this might be pointless.
“Two minutes left, baby,” Osamu hummed, their hand pushing some of Atsumu's hair back. “Go on, make daddy cum, if you want ya want yer reward.”
She could feel her own movements getting sloppier as she was trying harder and harder to get her twin to cum. The realization that she was trying to achieve something she couldn't had yet to hit her and she felt determined to get them there.
“Ten,” Osamu whispered.
Atsumu pushed in as deep as she could.
“Nine.”
Out quickly and in again, even if it strained her neck at this point.
“Eight.”
She had long lost control over she movements, simply letting her instincts take over as she fucked them with all she had.
“Seven.”
Part of her brain was telling her to give up.
“Six.”
But part of her was also still determined to do it. She hated going to bed without an orgasm, hated when Osamu denied her. So she had to do this.
“Five.”
She kept going, pressing her eyes closed to solely focus on the task
“Four.”
She could hear the amusement in Osamu's voice despite how breathy they sounded already. Maybe they were closer than they let on?
“Three.”
Atsumu felt tears once again well up in her eyes. The dildo in her own mouth was starting to become almost overwhelming.
“Two.”
She realized it was probably hopeless.
“One.”
Despite that she kept going. She would not give up until Osamu made her stop.
“Time's up, pet,” Osamu hummed, pulling her head back. “Ya failed.”
Shame washed over Atsumu. She really had tried her best. Osamu was looking down at her smirking. Before Atsumu even realized they had their phone out and camera pointed at Atsumu's face.
“Like this I can always have a reminder how useless of a toy ya are,” Osamu chuckled.
The tears in Atsumu's eyes were threatening to fall. Suddenly she no longer cared about her own denial, instead completely focused on how she had disappointed Osamu, how disappointed they were in her.
While she tried her best not to start crying, Osamu moved the chair back motioning towards the empty floor next to them. “Go on, on your back.”
Atsumu shuffled forward first, her knees scraping against the wooden floor with every movement. Laying down was another challenge in itself. By the time she finally managed to do it with her arms still bound, her shoulders hurt from the collision with the floor and she needed to put all her energy into keeping her lower body up slightly to not crush her cuffed wrists with her own weight.
In theory that shouldn't be an issue, she wasn't a professional athlete for nothing, but it felt so much harder now that she was already so far gone.
“Good girl,” Osamu said but it sounded more mocking than actual praise. It still made Atsumu feel as useless as the insults had. “Ya want Daddy to use yar face now?”
She nodded immediately, her head hitting the floor with every movement.
“Careful, before ya lose even the last couple braincells ya have left,” they went on. Atsumu watched as they got up and fully undressed, her eyes narrowing in on their boobs. She wished she could touch them.
Before she could further think about that however, Osamu was already hovering above her, pussy wet and on display for Atsumu. She tried to move her head up a little, but Osamu pushed it back against the floor instantly.
“Useless toys don't get to do that,” Osamu explained. “Yar gonna lay there and let me use ya face however I want. That clear?”
Atsumu nodded again, watching the dildo move with every movement she made.
Osamu hummed once, before grabbing the dildo with the hand that wasn't still on Atsumu's head, and slowly lowered herself on it.
This new position made Atsumu feel even closer to them than she had in front of the chair. There was nowhere for her to go, no moving back, no getting away.
Osamu moved up and down on it a couple of times, before she started reaching for something.
A small vibrator came into Atsumu's field of vision, as Osamu pushed it against their clit, right in front of Atsumu's eyes. Tears build up again in Atsumu's eyes at being unable to touch, unable to do anything about Osamu's pleasure. She truly was just a toy now. Osamu was only using her for their own pleasure as they kept grinding down on the dildo and using the vibrator on themselves.
Atsumu was no different than the vibrator. A toy to get Osamu off. Nothing else.
Her twin had stopped addressing her as well. It was as if she had been completely forgotten. All she could do was watching with big teary eyes as Osamu fell apart on her face. She couldn't taste, couldn't touch, couldn't help.
When Osamu came they eventually slowed down but kept their position for a moment, Atsumu's eyes now so close to their pussy she could barely see anything anymore. She wished she could taste.
Eventually Osamu moved off of her and Atsumu realized they were talking to her. She could only hear bits and pieces of ‘did so well’ and ‘my good girl’ but she let Osamu moved her around, unclasp the gag and pull it out before uncuffing her wrists.
“Let's get ya into a bath and then into bed,” Osamu whispered, pressinf a soft kiss to her forehead.
“Wanna taste ya,” Atsumu whined. “Please?”
Osamu shook her head. “Tomorrow, baby. Today ya made ya choice when ya agreed to the deal.”
Atsumu whined. The next day, when she was more clear of mind she would bitch at her twin about how unfair that deal had been, how Osamu had known there was no way for Atsumu to win it. For now however she simply let Osamu take care of her.