Yeah. First smut work for this fandom and honestly, I wasn't gonna post it but got bullied (affectionately) by some friends to do so, so...here it is. Hope y'all enjoy.

Ochako took a moment to wiggle her fingers, making sure she could keep feeling in them as she felt Izuku clasping the cuffs around her ankles. With a gentle touch, he spread her legs and quickly locked the chains to the cuffs, making her awkwardly stand on her tiptoes to keep pressure off her shoulders, her arms held above her head, the chains from them tied to the ceiling.

She felt the collar slide around her neck, tilting her head back so he had free access as he focused on the latches. "How many?" he murmured in question, waiting patiently for her response.

"Twelve," she said confidently, feeling him pause for a moment. Twelve was not something they'd done often, and she knew it concerned him, which is why the question that followed wasn't unexpected.

"Twelve? You're sure? If we do that, we're on a time limit," he asked, stepping around to look at her face as he spoke, one hand held behind her neck to keep the collar in place.

She quashed the urge to nod and make it more difficult, just smiling at him. "Yeah, I know, but I think I'll be fine."

He gazed at her steadily, before giving her a nod, trusting her as he always did. He stepped back around behind her and she felt the collar loosen as he put it on its lowest setting. "Okay, then I'll do this last. Let's get everything else in place first."

She bit her lip, shivering slightly as she felt the cool breeze caress her naked form. Her work study that day had been brutal, and she felt like she needed this time to decompress, to just turn her brain off and let Izuku do what he wanted with her. Even before they'd started the scenario, she felt goosebumps on her skin that had nothing to do with the cool air circulating the room and everything to do with what they were planning on doing. The anticipation had her entire body feeling hot, the sensation of dampness between her legs both uncomfortable and oddly enjoyable. Now that he'd locked her legs in place, she couldn't even squeeze her thighs together to offer some semblance of pressure, and that just drove her desires even higher.

A moment later, Izuku slipped the blindfold over her head and she found herself locked in darkness, sending every nerve in her body into overdrive. She knew he'd gotten it specially designed by Hastume, just for her, a blindfold that was incredibly comfortably and yet blocked out even the tiniest trace of light, just so she could relax and accept that she could see nothing, only her senses of touch, taste, sound, and smell active now.

Not that she could relax much, considering she was standing on her tiptoes to avoid pressure on her arms, but she wouldn't have it any other way. That stretching, that pressure, that slight tremble in her muscles trying to hold her in place, the strain, was all part of the scenario, part of what she wanted, that numbing pain that she could just dive into.

Izuku's hand rested on her shoulder, the soft touch sending chills down her spine. "Okay…check in. Safe word?"

Ochako swallowed. "Mochi," she replied.

"And if you can't say that?"

"I stomp three times," she dutifully answered.

"Demonstrate you can," he said softly. She could imagine him looking down at her legs, his heated gaze traversing her exposed skin and shivered once more with delight, but she did as she was told. Stretching slightly, she was able to stomp on the floor thrice, causing a small ache in her back from stretching but ignoring it. Izuku spoke, a smile in his voice. "Good. Okay, gonna tighten the collar now. Remember, the second it's too much, you say something."

"I know, Izu, I know. Promise, I'll say something," she replied, her lips quirking in a smile in return, even knowing he likely couldn't see it from his position behind her. She could practically feel his eye roll at her reply, but her thoughts quickly ignored that to focus on the feeling of the collar tightening around her throat, the little clicks telling her it was passing through the latches, getting tighter and tighter and there it was, just ever so slightly too tight, just barely enough pressure to make it difficult to breath. Another one of Hatsume's designs, specifically made to not put any pressure on the trachea, just the sides of the throat, but it was more than enough to give the same sensation of being slightly out of breath…and she loved it.

"Alright…now that that's all settled," Izuku mused, his voice suddenly shifting, losing the gentle quality she adored and suddenly dropping, becoming almost like a purr as he stepped up closer behind her, his body just barely away from pressing up against hers, his mouth next to her ear. "So, who are you?"

Ochako had been waiting for this, her body on fire as she tried fruitlessly to move back enough to feel his skin upon hers, but already knowing it was a waste of time. She bit her lip, trying to take in a deep breath but finding it ever so slightly too difficult to do. "Y-your slave," she managed to stutter out.

"Good girl. And who am I?"

"My master," she whispered, saying the words aloud sending sparks down her spine as she let her mind go blank, forgetting about being Uravity, forgetting about being Ochako, setting all that aside to just be an empty vessel for her master to control and use.

Izuku's low chuckle as he slipped into character made her squirm, loving the way it reverberated in her ear, and the sudden sharp twinge of pain as his teeth nipped at her earlobe for a brief second. She wanted to gasp, but couldn't quite manage it with the collar cutting her off, feeling faint. Finally, finally, she felt him press up against her, his naked body, all hard planes and muscle pressed fully up against her back, one hand holding her hip with a bruising grip, the other slowly trailing up her stomach, ever so slowly creeping its way up. She wiggled in place once more, desperate to get more, more feeling, more touch, more sensation, wanting, no, needing her master to do things to her…but all he did was continue to move slowly, assuredly, at his pace not hers.

His hand slid up into her hair, gently stroking it, sending shivers of anticipation down her spine as she knew what he would do next. And he delivered…his fist tightening in her hair, a painful grip, as he yanked her head back, forcing her to expose her throat and press it up against the collar around her neck. She let out a choked gasp, the heat between her legs roaring as she whimpered, eyes fluttering closed from the sensation. The hints of pain, the control, the reminder that he held her life in his hands and that she was still safe was everything to her right then.

Her master began to leave wet, hot, open-mouthed kisses upon her exposed throat and neck. She whined and whimpered, trying to get more, more speed, more touch, more anything, but he kept going at a maddeningly slow pace, ignoring her squirming in the straps. She bit back a moan as he sunk his teeth into her collarbone, digging in deep enough she knew it'd leave a mark, a clear indicator she was his and no one else's, and god she loved that.

"Is there something you want?" Master's voice was a slow, quiet purr in her ear as he lifted his head from where it was buried in her neck. She gulped, unsure what he wanted to hear but wanting to say the right thing.

A slap echoed through the room, her back arching as she cried out once more, feeling his hand slam into her ass with a resounding clap. Her punishment for taking too long, her muffled thoughts told her, making her open her mouth but unable to really vocalize what she was thinking yet, her mind still in a bit of a daze. A second slap rang out, her other cheek being hit, another quick reminder that she'd been asked a question.

Barely able to concentrate, she managed to mumble something, but that wasn't good enough apparently as she felt another slap, then a second, a third, a fourth, multiple to the point she was nearly sobbing in her bindings. She hadn't realized she was now straining against them, to the point even the soft ropes were biting into her wrist, and yet she didn't say her word. She could take this, she was a good girl, and she could take anything her master could give her.

"Can you now?" Master said, a chuckle escaping him as her dazed mind realized she'd mumbled that out loud. Still, that was a question, and she was going to answer this time, nodding frantically as best she could in her position. "That's good to know, my little slut. Let's see if it holds up."

Hearing him call her his little slut made her leak even more, the enjoyment she got of that indescribable. She belonged to him and only him and she was more than okay with that, no one else got to see her like this, no one else got to touch her like this, she was Master's little slave and that was all she wanted to be. She was unhappy when she felt him move away from her though, unable to feel the heat of his chest or the press of his body against hers, but she knew he was going to make her feel good.

Moments later, he returned, standing before her as far as she could tell from the way he pulled her tight against him, his pelvis pressing into hers. She could feel his body against hers, feel the hardness that was all him pressing just up against her center and found herself trying to rock her hips ever so slightly, trying to get some friction, just a tiny, little amount, and yet he kept her still with one sure grasp on her hips. Instead, she felt something touch her chest, the sudden shock of cold making her jolt, a frozen little feeling pressed up against her nipple. A second later, it was pulled away and replaced with his mouth, the instant change in temperature from freezing cold to wet hot heat making her jolt.

She happily pushed her chest out, desperate for more, to feel more and more and more, and was rewarded by Master's hand pressing the ice cube against her other nipple, the wetness on his fingertips sliding over it as he started switching his mouth and the cube back and forth, sending shocks throughout her system from the rapidfire changes. She cried out when his free hand suddenly slid down her abdomen, tracing her muscles, to cup her center directly.

She tried to rock against it, but once more he kept her stuck in place, just the pressure from his hand there and not actually doing anything with it. The frustration built, desperate to feel something, especially as she still couldn't see anything, couldn't tell what his expression said. Was it mocking? Or caring? Or that determined glare he got during a fight that always took her breath away? She didn't know and she wanted to, but god's she couldn't think. So many sensations torrenting through her, so many shocks to her system, and the pressure on her throat was causing her to feel faint and lightheaded and oh god he was moving his fingers, barely swiping across her slit with a gentle pressure and she needed him so badly.

"M-Master, p-please," she managed to stutter out, her voice coming in a breathy gasp.

"Please what?"

"P-please, please let me cum, please, I-I need you to make me cum, please," she begged, desperation evident in her voice.

Master paused in his ministrations with a contemplative hum, seeming almost casual as he dropped the ice cube, his cooled fingers trailing wetness up her chest, over her neck, up to her mouth where he held them against her lips. Instinctually, she opened her mouth and sucked his fingers in, running her tongue over them repeatedly, desperately, hoping it would make him do more to her if she showed how devoted she was.

"Do you think you've earned the right to cum, hmm?" he asked her, his tone even as if he were asking her what the weather was. She didn't reply, too busy sucking on his fingers to bother focusing on that, she had to prove herself, to show how much she wanted him. She almost lost control and nearly bit him when his other hand slid up her slit to press against her clit without warning, the surge of pleasure making her entire body tense up. Her hands desperately scrabbled against the ropes holding her tied to the ceiling, gripping tightly to them as she tried to get some freedom, something to press against, but unable to find any slack, any give.

"Please," she begged once more, her voice muffled by the fingers in her mouth but the meaning was clear. Master chuckled in her ear, pulling his hands away from both her mouth and between her legs, making her whine, but the sensation of his body pressing against hers once more, fully pressing his form to hers made her drop the whine in anticipation, in hope.

Her desires were fulfilled just a moment later, finally feeling him slide within her, the familiar sensation of her master claiming her fully making her nearly sob with relief. She couldn't close her legs around him, couldn't latch onto him with her hands, all she could do was accept as he took her with a bruising pace, his hips slamming into hers over and over, in and out, sending her mind careening off track and into another world entirely.

"You're such a good girl for me, such a good slut," Master murmured in her ears, his own breath hot and panting as he pushed himself. She couldn't help but preen under the compliments, trying to match his movements, to match the sensations flooding through her, to make him feel as good as he was making her feel. She tried to reply, but all she could do was babble incoherently, her head so lightheaded from the collar that she could barely understand his speech and yet she loved it.

"Maybe I should make sure I fill you up, knock you up, turn you into nothing more than my little breeding slut. Would you like that, hmm? Do you want me to just turn you into my toy, into my little cumslut whose only purpose is to get used and bred?" he taunted her, his teeth nipping at her earlobe as he kept whispering filth in her ear. His tightly corded muscles pressed into hers, moving even faster than before, filling her with an ache that she relished.

His words slowly filtered into her mind, into the haze she was in, and she embraced them freely. Being used by him, controlled, ruled over, no responsibilities, no duty, just existing to bring him pleasure, to carry his children, all she could do was groan and sputter her own requests to feel that, to feel him erupt within her, to breed her over and over again. She felt herself being pulled taut, her body begging for more, so close, so very very close, and then she snapped.

With a choked scream, she came, every muscle in her body quaking as she felt her limbs go boneless in the binds, barely able to comprehend his few following thrusts before he hilted himself inside her one last time, warmth flooding within. Her head fell forward, all support gone, her mind empty and faded.

She barely noticed as he panted for a few moments, holding her tight, before he said something she couldn't quite catch. After a second, oxygen rushed back into her, almost painfully, as the collar around her throat was loosened and removed. She gulped in the air like she was starved, still lightheaded and dazed, but a slight sense of relief flowing through her. A moment later, one leg freed, the second one right after, her legs sliding together, limp and unable to hold her up as she slumped further in the restraints.

One arm wrapped about her waist firmly, the other reaching above her and then with a simple twist, she was freed. She collapsed like a puppet with her strings cut, falling into his arms, a gentle touch oh so different from before. A moment later, she was carried away, finding herself set down in a lap and feeling a damp cloth slowly rubbing over her as she felt her breath and heart rate starting to slow. A pressure around her eyes vanished, and she blinked blearily, the room just dim enough not to hurt her as she saw concerned green eyes staring into her own.

"Hey 'Chako, you back with me?" he asked softly, her fuzzy brain taking a moment to recognize it was her boyfriend.

She nodded at him jerkily, still feeling too wrung out to really talk, but with one hand she managed to slide her hand over and grip his, giving him a light squeeze to confirm she was okay. He nodded, accepting it, continuing to clean her up carefully. She leaned back into his comforting embrace, humming softly as she enjoyed the sensation of him running the very soft cloth over her. A few moments later, she felt a tap on her hand to get her attention, making her blink open her eyes once more. Izuku held a water bottle up before her lips, still leaned over her shoulder and gazed at her with concern.

She managed to grab the bottle from him, already opened, not wanting him to do everything for her right now. Her hand shook as she grasped it, his hand cupped beneath hers ready to catch it, but she managed to bring it to her lips and start to drain it, finding herself so incredibly thirsty she downed the entire bottle without stopping. The water combined with the time managed to clear her head just enough that she could look over at her boyfriend tiredly, giving him a soft smile.

"Thanks for that, Izu," she murmured, laying back against his chest and nuzzling into him.

"Feel better now?" he asked in response, dropping the cloth and wrapping both arms around her waist, holding her close.

"Mmmhmm," she hummed back. "Felt real good. You were great. Do you want something back?"

She felt his head shaking in negation from behind. "Not tonight, you're exhausted. Maybe tomorrow, I have a long patrol at my work study."

She grinned, spinning about in his lap enough to look into his eyes. She leaned forward and gave him a soft kiss, breaking it after a brief moment. "So what's it gonna be then?"

Izuku offered a sheepish shrug, but with only the faintest blush on his cheeks responded. "I was thinking uh…your puppy hasn't been out in a while."

Ochako's smile grew wider, already running through a scenario in her mind as she nodded. "Okay. I can do that." She shivered as the AC kicked on, sending cold air through the room. "...but maybe it's cuddles time now?"

Izuku smiled back at her, leaning forward and gently pressing his forehead into hers. With a quick kiss on her forehead, he stood up, shifting her in his arms to carry her bridal style, Ochako feeling a warmth in her chest that had nothing to do with the temperature, just adoring the feeling of him taking care of her. As he lay her down and puttered around the room to put their toys away, she watched him move with a happy expression (and if she stared at his ass just a little too long, well, his fault for having such a nice one), just eagerly waiting for him to rejoin her in bed.

As he finished turning the lights off, she opened her arms for him, her boyfriend quickly sliding into the bed next to her and pulling the covers up with him, Ochako slotting into his arms with a heavy sigh, happy to nuzzle into his arms as she contemplated the following evening's activities. With one more shared kiss, a soft, gentle one that they held for over a minute, they finally were able to drift off to sleep, safe and sound in their lovers arms.

Also, aftercare is important and so is making sure all safe words and safe gestures can be said/emoted properly before getting into any scenario! Safety FIRST in BDSM, always! This has been your Shade PSA for the day.