Work Text:
Eri looks so peaceful when Kai operates on her. It’s his favorite way to see her.
However, his second favorite way is when she’s sleeping. Every so often, if he just can’t help it, he’ll allow himself to step into her room long after she’s drifted off and he’ll just watch her for a few moments. It he’s feeling particularly sentimental, he’ll lift up the blanket and touch her. It’s never malicious, he would never never touch his daughter in a way he deems malicious. He just likes how soft and familiar her body is, and, moreover, he likes how she doesn’t say no like this. The closest she ever comes is huffing out a small noise, but Kai can easily shush her back to sleep. She’s good at listening to him.
It’s different when she’s on the operating chair.
Eri had been scared of it at first, which is unfortunate because the chair itself was a pricey investment— it moves all sorts of way: up and down, left and right, hell, the thing even spins and tilts, and each appendage is able to move independently. It’s a glorious thing, and, a handy tool of a doctor. Any way that Chisaki would want her body, he could make her that way with a push of a button or two without having to touch her.
He had only gotten her to sit down in it for the first time by the grace of her childish curiosity and a little gentle guiding. Chisaki had done his best to sate her nerves and even held her hand as she stepped up into it, which didn’t seem to calm her down any, but it did prevent her from tripping. She had been stiff and didn’t even thank him for how comfortable and unfortunately childish it was. He really had tried to make it nice for her— in addition to ample cushioning, he had gotten the thing upholstered in a gaudy pastel pink, just for Eri. He’s not even sure if she had even noticed, but, he thought it was remarkably kind of him.
She was ungrateful for most of the things he did for her.
For example, he didn’t have to give her anesthesia when he cut into her; the sounds of her screaming and dumb whining would do nothing to phase him, and, luckily, the chair was equipped with thick straps that kept her from moving in any way he didn’t want her to— she didn’t even have the option of trying to push him off of her. Any squirming away from his scalpel would be futile. But, in his benevolence and out of the kindness of his heart, he gives her medicine to make all the pain go away. He would never hurt her like that, and he hopes she knows that.
But, more often than not, Eri goes down kicking and screaming until the drugs finally take hold and put her into a deep sleep.
That’s when Kai liked her best.
He decided this upon seeing her finally lose her struggle against the anesthesia after a particularly hard fight— he was almost impressed! She had been screaming, grabbing onto everything within her reach to try to cling onto the reality that was slowly slipping from her. She cried out his name, she cried out for Kurono, she cried out for anyone who would hear her. No one came to her aid.
“Now, Eri.” He had said, entirely disregarding her pleas as he lined up the tools he would put to use on her later. “Again with you always defying me? Stop this— you should be thanking me.” He held up one of the tools so she could see it clearly, in response, her thrashing stilled.
Funny, how that worked.
“Good girl— I doubt you’d want to watch me use this on you, hm?” He admired the blade— it was sharp and would cut into her in a perfect, clean line. “Let alone feel it. I’d be happy to demonstrate on you now, though, if you need a reminder.”
He approached her and she quieted instantly, reduced to tears pouring from her eyes as the expression on her face began to slip away.
There had been a time when Kai had attempted to operate on her when she was lucid. It was doable and still a viable punishment for when Eri began to act up, for long-haul sessions like the one they were about to enter, he preferred her silence or at the very least, dopey compliance. And, despite what it seemed like, he wasn’t a monster: he could recognize that for a young girl, no matter how many times she had been under his knife, it would always be a little bit scary. So, anesthesia was the best option for all parties involved.
He set the scalpel down a moment later with no legitimate intention of doing anything to her until she was knocked out. They were caught in a sort of starting contest until she finally went down: him looking down at her expectantly as she was panting and crying and her eyes darted from him, to around the room, and back to him. Finally, after too-long of a time, her lids slowly began to close and her muscles relaxed.
“‘Atta girl,” he stepped on the control for her chair and it slowly raised as Eri finally lost her will, going entirely limp by the time Kai released the button.
It was beautiful, watching her slip away into nothing.
Once that was done with, he called over Kurono, who brought over a rolling cart of various pieces of more bulky equipment. The sooner they got to work, the sooner they could continue more important parts of the plan.
—
Eri didn’t move a muscle through the duration of the surgery, which was convenient for them. Though Chisaki’s hands were steady and had been used to the motions of this for years now, Eri’s unconscious compliance made the Sisyphean task much easier. She rests easy, unaware of what’s happening to her, and when she wakes up, Kai’s better angels will convince him to at least humor her if she tries to sneak onto his study and bother him.
Though, lucky for him, after she wakes up in pain, realizing what’s happened, she usually tends to avoid him for at least a day. That, or she’s just too tired to move. Kai has never cared to check.
Another thing he’s nice about, he notices as he instantly begins preparing a cut after adding another perfectly severed square inch of flesh to the tray that Kurono has set out for him, is that he heals her wounds at all. Some repairs are necessary if he intends to keep her as a viable lab specimen, which he does, but more often than not, he heals the cuts to about 90% completion. It’s enough to be uncomfortable and impair her movement for a day or so, but not drastically, and she certainly isn’t bleeding out into her bandages. He would never be that cruel.
Chisaki quietly removes another half-dozen samples of flesh, and a few samples of her skin for good measure. He’s pragmatic— he’s always looking for more streamlined ways to increase bullet production, and he’d hate to have to drag her in the lab again this evening if he comes upon a miraculous discovery that would necessitate this. Again, he’s amazed by himself; Eri makes him out to be some sort of evil villain, and yet, every move he has ever made and will ever make, he makes with her happiness in mind.
—
When he finished taking all the flesh he needed, he dismissed Kurono, thanking him for his help as he left. Eri still seemed to be substantially sedated; he started down at her, watching her breath fill and escape her as he cleaned her blood off of one of the tools he had used.
“Eri,” he tested, to see if she would respond at all. To no surprise, she remained silent and unfazed. The fatherly part of him was happy to see her at ease; she spent so much of her life scared of him. It would be easier if she was like this around him all the time; he could do whatever he wanted and she couldn’t tell him no, but he would make her happy. He knew what her needs were and was able to provide for them adequately and then some. He was intimately familiar with every part of her body, he had pulled her apart and mended her back together so many times, that, really, it would be embarrassing if he wasn’t able to care for her. And yet, what did she know about him? Nothing. He knew every detail that one could possibly know about her.
He hadn’t realized that while deep in thought, he had been encroaching closer onto where she lay on the chair, the scalpel held in a tight-fisted grip.
He resented her, that’s what it was. Kai had sacrificed everything for her, fixed her every mistake, and assisted in everything she did, whereas she did nothing in return for him but cry, fight, and rebel against him. He had dedicated his life to her, she had dedicated her life to rejecting him. It was disgusting— sickening, really. What daughter would do that to her own father? He could have destroyed her on the spot with the anger that swelled inside of him. He imagined her blood spilled across the stupid pink chair, on his floor, and across his shirt. Ironically, covering the lab with her remains would be the smallest of her messes that he would have ever had to clean up. The premise was tempting; one touch and he would be free of her.
Among those violent thoughts, another, less gruesome one came up: he noticed Eri was approaching adolescence. It was painted all over her body in how she began to grow. How inconvenient. He had been mindful to keep her medical robe closed throughout the surgery when he could: he didn’t like the idea of Kurono seeing any part of his little girl that as meant for his eyes only. Now, however, it began to slip off of her and oh. What an inappropriate sight.
He moved to adjust the gown on her, covering her chest, but, well, her breasts we beginning to get too big for comfort. They weren’t ample— she was still young and rather lithe by nature, but still, to see his daughter developing like that, truly, it made his heart wretch.
In a thoughtless, almost careless movement, he used his quirk on her and the flesh collapsed in on itself; what had once been breasts became two small buds. He felt better about it now; he left her gown open, still assessing her body.
Inspecting her was an easy job for him; he knew what she should look like, and, if anything looked different, it was easily fixable. He adjusted the positioning of the chair a few inches so it was tilted more horizontally, about a 60 degree tilt so Eri looked like she could have been standing in the chair. With another look he was unsatisfied and adjusted the height so she was just a bit more raised than before.
I even take the time to make sure she’s perfect, he mused privately, adjusting the medical gown this way and that, fussing with her hair and enjoying her lack of ability to protest against him, yet if she were awake, she’d be looking at me as though I were about to molest her.
He went on like that for a while; it was almost meditative, being able to dote over her in silence, yet before he knew it, the anger which had waned took hold once more and he had the urge to destroy her. Selfish, ungrateful brat.
A rash broke out on the side of his face. He felt disgusted. He had to purge both of them from this filth.
He knew what he had to do.
Logically, he knew that couldn’t kill her. He had too much riding on her, and, all he had done would be for nothing without her. Plus, she didn’t deserve to die just for being ignorant. He felt almost sorry for her in that regard; he had done everything in his power to help her and she was still a sad little child who was too dependent on her father.
“If I had raised you better”, he mumbled, giving her fair warning as he sunk the scalpel into her midsection, dragging it through slowly, “I wouldn’t have to do this.”
He continued making incisions, and though he was careful, he let himself be more generous with them than he might otherwise had been. He could fix whatever damage he did to her, and, moreover, if she came close to death, he could ameliorate the situation quickly. For now, though, he let himself enjoy watching her skin separate beneath his fingers. He cut deeper and longer— blood began to dirty his hands.
It poured from the cuts liberally; his gloves quickly became covered and it was already beginning to spread onto his shirt. Suddenly, his fantasy about killing her didn’t seem far from reach at all. A slip of his knife and, oh, goodbye, Eri. Surely all dads felt like that at some point, he told himself. He knealt down, indulging in a closer view of the splice as he cut a perpendicular slice to match it, creating a small flap in her skin from which he could see everything better. It was breathtaking.
Beneath the glaze of red, he could see the folds and wrinkles of a few pinkish organs; they looked soft and shiny. Inviting, just like the rest of her.
He had gone so many years without indulging in experimentation for personal gain; every ounce of flesh he had harvested from her was for the good of mankind. Every action he had taken was born from the kindness of his heart and unrestrained idealism. Surely, he would be forgiven if he allowed himself just this one thing.
Slowly, he sunk two fingers into the cut, pushing back the folds and feeling around inside of her.
He panted; it was licentious how her body, in all ways, bended to his will. His fingers pushed in deeper as he became more exploratory; he curled them, spread them, and tugged at various parts just to see what would happen. It was all slick beneath his hand; shiny and wet with blood. It was better than looking at her cunt, in some ways; she liked that, and was painfully obvious to him no matter how hard she cried about it.
This was so much more violating; he owned her, he was the only person in the world who could do this to her without the promise of death. No, this was much better, she would have to live with this, knowing that not even her vitals were safe from him.
The cut opened more the deeper he forced his fingers in— the shape of his whole hand finally tearing her skin open wider as he thrusted his fingers in and out; he would clean the blood later. He would even be nice enough to replace her blue medical robe with a pink one. I always put your needs first, he twisted something fleshy and crimped, taking two fingers and curling it around itself, yet you always defy me.
The scalpel still in hand, he pushed the blade into the mess he had made of her guts, cutting open one of the organs he had been toying with. More blood and other viscera spilled from her, the collection of fluids trickling down his wrist. He was too caught up in the moment to care how dirty this was or what a mess Eri was making. She was tight, warm, and the pleasure he gained from this was unmatched. He pushed his fingers into the split organ, twisting his fingers around to feel what heat it offered— it nearly sucked on his finger, beckoning him in deeper.
He, unfortunately, tired quickly of what this could offer him. He wanted more.
Tentatively, he stood up, assessing Eri’s condition.
“Oh,” he noticed her eyes were open but only half lidded; the sedatives had begun to wear off. He cupped the hand that he had just had inside of her around her cheek. “Good morning, sweetheart.”
Eri was still out of it; only half conscious. “K-Kai?” Her voice was smaller than he had heard it in a long time.
“That’s right— good girl,” he dragged the hand down her cheek, trailing blood from her face all the way back down to her torso, tracing his finger over the empty incison, teasing it. “I’m Kai.”
“Kai.” She breathed out, tensing her stomach at the sudden intrusion. “Kai!”
“There you are, waking up a little?” He slipped one finger in as delicately as he would had he been fingering her cunt.
“W-what are—“
He hushed her, pushing a second finger in; he was careful not to thrust them in and out too fast, he wanted to savor the feeling of her abdomen contracting around him.
“Stop, Kai,” she was still too weak physically to pull against her restraints, but it was clear that it was what her body wanted to do. “What’re.. what’re you doing?”
He didn’t gratify her confusion with a reply, instead, he used the hand he wasn’t fingering her with to guide her glance down. Her head moved easily: the anesthesia still had a strong hold on her and her body was still weak. Kai could only imagine how horrifying the sight must look through foggy vision.
Eri stared blankly, her drugged mind surely working fast to connect the dots and explain away what was happening. If he wasn’t enjoying himself so much, if he weren’t so hard, he would laugh at her idiotic helplessness.
“K-Kai,” she spoke just above a whisper. His cock twitched in his pants— it was tempting, and, each micro-expression of fear and confusion she made only added to that.
It wasn’t like it would kill her; it wasn’t like he couldn’t erase whatever evidence he didn’t want to linger.
It wasn’t like she could say no. It wasn’t like that would stop him.
He removed his hand from the wound, wiping the blood off on her medical gown, remembering his mental promise to her that he swore he would fulfill. He undid his pants, his cock already hard and throbbing; he was disgusting for this, a voice in the back of his head nagged him. He paid it no mind; taking Eri this way was his right.
The second she saw his cock nearing cut, he could see her panic increase.
“What’re you doing,” she asked more worried, trying to move away with no success; the loss of bodily fluid surely wasn’t helping her mind in addition to the drugs, but he couldn’t help but blame her dumb questions on her own stupidity.
“Stop, Kai don’t, stop,” she pleaded, her wrists gaining autonomy as they began to push against her restraints; she was gaining lucidity as quickly as she was losing it. “Don’t put your— your thing in me, please.” With a step on the button, the chair moved so that her arms were held above her.
Something about the combination of shock, pain, and sudden movement must have startled her, and, as soon as her arms were up, vomit sputtered out of her mouth, dribbling down her chin.
“You’re making a mess on your nice chair” He grabbed the towel hanging on a hook kept there for easy access, holding it above her face. Staring down at her for a moment, he admired how destroyed she was; if she remembered this tomorrow, he doubted he would have to deal with much backtalk from her for a while. Maybe this was the key to getting her to follow his rules; delusionally, he wonders if he had done this earlier, that she might love him as her father. He gripped her chin harshly, forcing her to look up at him.
“Poor thing,” he softened, gently cleaning away the vomit, throwing the towel to the floor.
She looked up at him with tears in her eyes; a silent plea for him to stop, or, at the very least, put her back to sleep so she didn’t know what was happening.
But Chisaki was too ravenous for that; he cups her cheek again: his poor, sweet, dumb, little girl was open and ready for the taking.
He gave his cock a few quick strokes, holding it steady and pushing the tip into the incision. Kind enough to take his time, he forced his way into her guts slowly. She sputtered out pleas, cries, and mumbles, but her head fell and she watched the intrusion as intensely as Kai did.
When he bottomed out, they were flush against each other. Eri was still trying her best to squirm away, entirely unable to push him off of her or get him to stop, but Kai was as content as he could ever remember being. He dropped his mask, letting it fall somewhere on the floor along with the vomit and blood; he was as close to someone as anyone could get and he was absolutely blissful. He understood the point of intimacy.
His head tilted forward, he lifted her chin and placed a tender kiss on her forehead hoping that she was lucid enough to feel it.
To some degree, she must have been, given the small whimper she let out between pained cries.
He braced a hand on her hip, beginning to fuck into her properly; the expanse of her intestines contracted and retracted around him, the sloshing of their contents making the experience all the more pleasent. Kai knew he could never do this again— he wasn’t the monster Eri seemed to think he was— this had been a lapse, no, it had been an opportunity to teach her a lesson. Kai thrusted in harder; Eri stopped struggling against her restraints.
“Eri, when I finish,” he began mumbling, no longer watching the how beautiful his cock looked going in and out of her, but rather resting his mouth against her forehead, talking into her skin. “I’m going to do it inside of you, then it’ll all be over, okay?”
She said something incoherent through a sob.
“Good— see, it’s not too bad, is it? You’re making me feel so good, God,” he exhaled, sighing as he pulled away so he could watch his thrusts. He was determined to see himself cum inside of her and see it leak out with the rest of the fluids she had lost.
She was beginning to look relatively pale; Kai moved faster. If it was between this and death, he could bring her back from the closest of incidents in seconds, but painting her gut with his seed was something that he would only do once; he intended to enjoy her body thoroughly. He pulled the skin of her abdomen up, taking his cock out of the soft folds of her intestines and pushing it up so it was sheathed between her organs and the skin of her stomach. His cock formed a large bulge that seemed to expand most of her abdomen. He placed his hand over where he could see the outline of his cock and stroked in tandem with controlled thrusts.
Eri, on the other hand, was doing her best to look away, her gaze locked on the ceiling as she bit her lip trying to not make a scene.
Or, more likely, she was just too weak to make a scene. Kai didn’t want to give her the benefit of the doubt by assuming that Eri would ever intentionally be well behaved. He thrusted harder and deeper; Eri tried her best not to cry.
When he began to feel himself get close, he stilled, pulling his cock out enough so he could only see how the tip disappeared back into her intestines, his flesh covered in her blood as he jerked himself off into her. He would have to shower later and he would have to clean her up later, too. Maybe, once this was over, he would pull her into a bath with him and let her sit between his legs while he washed her hair. That didn’t matter now, though, Kai’s groin was quickly tightening and he began stroking his cock more haphazardly with as much fervor as he could manage. The previously clean-cut slit had become marred and torn: had had done more damage than he’d intended, but as he began to see thick white ropes of his cum splatter inside of her, he knew it was worth it.
He moaned her name as he finished, his load seeping in-between the folds and twists of her intestines; he pushed his cock in, forcing the cum deeper inside of her. It dribbled out with blood, though some stayed in, painting her insides.
By the end of it all, Eri was on the verge of passing out, and death seemed closer and closer. Chisaki wasn’t worried; he pulled himself out of her, taking another towel from the hook and cleaning off his cock before pulling his pants back up and straightening himself out.
Cupping her cheek again, he leaned down and whispered into her ear. “You deserved that,” he told her, placing the other hand on her abdomen as he allowed his quirk to slowly repair the damage he had caused. “But you took it well.”
He knew that what he had done might have been considered cruel, but, in his defense, at least he could remove the traces of evidence and allow her to come out the other end unscathed.
Well, mostly unscathed.
As he finished healing her, he decided to give this wound the same treatment he would give any of her other wounds; he healed it nearly all the way, which was still more than her body would have been able to do on its own before she would have succumb to illness or infection. Now, there was just an angry red cut tracing itself over her abdomen. If Eri stretched too much, it would probably ache and maybe bleed a little, but it wasn’t horribly raw.
He ran his finger over the cut before Eri came into full awareness. It was easy to tell where her skin had ripped from his harsh intrusions; he liked it. And, moreover, decided it would be a good reminder for her. He didn’t want to do this to her again, but, if she tested him, he would for her own good.
When Eri woke up, she looked at Kai, terrified.
“I’m done,” he shushed her, undoing the straps on her limbs and stepping on the chair control, bringing her arms back down by her sides, “I’m all done.”
“I’m messy,” she commented, too in shock to say more.
“You are.” He undid the leg straps, moving up to her arms. “You should be more careful next time; if you hadn’t thrown up, there wouldn’t be so much filth everywhere.”
“I— uh, uh huh.” She agreed, shaking out her arms once she was free.
“Does your stomach feel ok?” He stripped the robe off of her, throwing it with the previously discarded towel.
“Hurts,” she covered her torso with her arms.
“Like a tummy ache, or like a bullet?”
“Uh…. Tummy ache.”
“That’ll subside; you need to get clean.”
“Oh.. yeah, I can,” she tried to step off the chair as if to go back to her room, embarrassed that she was so dirtied by her own blood.
“No,” he put a hand on her shoulder, crouching down and lifting her up so he was carrying her around his chest. “With me.”
She rested her head on his shoulder, not daring to use the fabric of his shirt to wipe off any of the mess. “Okay,” she said quietly, hugging her arms around his neck.
Kai liked her like this; she loved him and she needed him.
He was her only source of comfort and would be until he was eventually forced to turn against her again due to her own insubordination.
Right now, though, he was content. Both his sexual and destructive urges had been sated, and Eri was listening and pliant despite being awake. This was the happy family he had always envisioned when he first adopted her.
Kicking the pile of wet fabric aside, he attempted to step over the mess on the floor. This would be cleaned later, either by him or one of his men on the guise of some flimsy excuse. For now, however, he wanted to enjoy his time with Eri, walking her over to the bathroom connected to the lab. He set her down on the counter and drew a bath, helping her step in before joining him herself. Her back rested against his chest as he made her pure again.
He would be a good father to her tonight, cleaning her off carefully and playing with her in the tub, doing his best to make her smile. He would tuck her into bed and read a story, sitting next to her until she drifted off to sleep, pulling the blankets up around her before he left. He would love her tonight, and she would love him too.