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It's a Sin

Summary:

Izuku and Ochako are secure in domestic bliss. Katsuki ensues.

Notes:

Thanks to Sarah for beta.

This is a direct rewrite of the linked fic.

(See the end of the work for more notes.)

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Part 1: Katsuki

-

Class 1-A ran laps around the outside track, and Bakugou Katsuki was angry at Deku. It wasn’t out of the norm, and neither was irritation towards Deku. These were examples of the normalcy that composed Katsuki, along with a preference for spicy food, explosions, and big tits.

Right now, the irritant was not the lack of said honkers, but rather that they weren’t in front of his face. Katsuki was on the opposite side of the track, far ahead of his peers as always. He asked himself how that was a detriment, and concluded this as the sole exception. His hearing wasn’t as good as it used to be, but his sight was sharp. 

There was only one way to alleviate the boredom of monotonous running, after all, and that was staring at Uraraka Ochako’s gigantic breasts.

They weren’t the largest in the class by a long shot. The ponytail bitch won that prize with room to spare. Ochako’s tits were big enough to fit in his hands; Katsuki itched to grope her just to see if they were as firm as they looked.

Katsuki made sure he was subtle, because Ochako had been dating Deku for three months, and was completely secure in domestic bliss. What she saw in him, Katsuki had no clue. Deku was small and fucking weak, and didn’t deserve as beautiful a specimen as Ochako. 

Katsuki would find a way to destroy their happiness even if it killed him. Hopefully it wouldn’t come to that. There had to be a way to destroy Deku without compromising Katsuki’s career.

(It’s not that Katsuki didn’t have morals. It’s that they were untouched, still wrapped in their mint packaging. He acknowledged his sins, and continued on his merry way.)

His plan was simple: make Ochako leave Deku. Ditching him for Katsuki would be a bonus, although he wasn’t too fond of having a girlfriend. They required maintenance, similar to his gauntlets or a particularly yappy dog. But he needed to make Deku’s life miserable, and what was better than stealing his one and only away?

He ran faster until he lapped Deku and Ochako, running in a pair and chatting quietly behind the rest of the group. Katsuki situated himself between them and behind the useless clump that consisted of the rest of 1-A.

Then he tripped. Deliberately. It wasn’t anything humiliating, or completely enthusiastic. He pretended to scuff his shoe on the track and went down, falling to the side and landing heavily on his leg.

It kinda hurt, but he wasn’t a pussy. Moreover, it had the intended effect.

Rather than simply navigating around his body and continuing to run like Deku was surely contemplating—what was Katsuki thinking, Deku’d run to him just as predictable as the sun set red—Ochako’s bleeding heart brought her over. 

“Oh my gosh,” Ochako said in her high, squeaky voice, “are you okay?”

“Fine,” Katsuki grunted, because that was what they expected. He couldn’t go around saying it actually hurt. That’d hurt his street cred, and make him seem unbelievable—or worse, out of character. “I’m completely fine,” he repeated, lying a little. He couldn’t show weakness, or the fact that the beginning of his plan went slightly off the rails. He was smart, he’d improvise.

Aizawa blew his whistle from the stands and yelled, “Bakugou, go to the nurse to get yourself checked out.” Katsuki could almost imagine his internal exasperation: Honestly, these kids! Katsuki wasn’t a fan of being underestimated, but here it was to his advantage.

Katsuki rose while Ochako clucked at him, making him want to punch her in those perfect teeth.

“What are you doing? You shouldn’t be walking around. You’ll injure yourself—uh, worse!”

“I’m fine,” Katsuki said, annoyed, and went back down as his leg gave out. 

“That’s it.” Ochako crossed her arms. “I’m going to walk you there.”

“Fine,” Katsuki grumbled, “be my cane.” Inside, he was celebrating. He and Ochako would be alone

“Maybe I should come with you,” Deku said, eyes darting between the two of them, lips twitching as he mumbled words under his breath that Katsuki couldn’t make out. 

Too little, too late. Now this— Katsuki could work with this.

“Are you really gonna babysit your girlfriend?” Katsuki sneered as he let Ochako heft him to his feet. He looped an arm around her shoulder, suppressing his satisfaction. “Is she in fucking kindergarten? We’re perfectly capable of going ourselves.”

“What Bakugou means,” Ochako asserted, “is no, thank you. I can get him there just fine.” She curled her lip. “Unless... you don’t think I can do it?”

Deku froze. Katsuki resisted breaking out into a huge grin. Trouble in paradise? That made Katsuki's job even easier if the wooden board that composed their “relationship” was already splintered. He didn’t even have to aim for the fault lines. One kick and they’d break apart—Katsuki was sure it’d make the most satisfying crack.

“No, Ochako”—Deku twisted his hands, how lame was he?—“that wasn’t what I meant at all—”

“We’re going now.” Ochako turned away, dragging Katsuki along. “Bye-bye, Deku.”

They left a speechless Deku behind, mouth open in undignified shock.

“What a loser,” Katsuki said once they’d hobbled a third of the way there. They were in an empty field with nothing but grass, buildings in the distance.

“Don’t talk about Deku like that,” Ochako snapped. Oh, so it was like that.

“C’mon, baby, you really think you’re good enough for a beta like Deku?” Katsuki said. He snuck an arm to grab a tit and squeezed. 

“How dare you?” Ochako gasped and dropped him. As Katsuki fell on his ass, he wondered if that was maybe that was too much improvising on his part. But damn, it felt awesome to throw Deku under the bus. 

Time to come on less strong. “You know you’re so much better than he is,” Katsuki said from the dirt. Ochako brought back her foot like she was about to kick him, so he added hurriedly, “Did you know he was a quirkless nobody once?”

“You’re lying.” Ochako lifted her chin. “Deku tells me important things, and if he didn’t, he must’ve had a good reason.”

Well, she wasn’t wrong, and Katsuki was trying to sabotage Deku’s happiness, not endanger the world by exposing an age-old secret. “But,” Katsuki said, thinking quickly—he had to breed distrust somehow, “what if he didn’t? I’m the only one who knew him before UA, the only loose end that he couldn’t tie up. What if Deku doesn’t want you near me because he doesn’t want you to know how he used to be?”

“People change.”

“I disagree. On the contrary, people are constant,” Katsuki said with confidence. “That’s the one thing you can count on, like the inevitability of alarm clocks and huge ti—ahem. They don’t change, at least not fundamentally. They can dye their hair or buy new shoes, but that’s surface level. I will always be an arrogant asshole, and underneath all of his fancy new quirks, Deku will always be the same useless weakling he was at Aldera, and has been his entire life.”

“He isn’t,” Ochako protested, but Katsuki could tell that she was listening. Against all odds, something had gotten through to her.

“I’ve known him since we were toddlers.” Katsuki leaned forward, pressing his advantage. “I’ve seen him grow up. I can’t even say he grew up at my side because he was always behind me. Always lagging one step behind, imitating real talent. He’s no better than fucking Monoma.”

“I think he’s a little better than Monoma—”

“Why do you call him Deku?” Katsuki challenged. “He has other names. You could call him Midoriya, or”—he grimaced—“Izuku.”

Ochako flinched, and more importantly, she didn’t answer.

That was the crux of it, and ultimately what drove the hammer stroke against the wedge and into the biggest flaw. Ochako called Midoriya Izuku by the name of Deku, and Deku let her do it . Even if they’d “rebranded” the name or some other garbage justification, there would always be a part of Deku that died inside every time Ochako moaned his name. 

Although by the second, Katsuki became more and more certain that she never had.

Katsuki tackled her legs. She thumped to the ground next to him, and Katsuki rolled heavily on top of her. She did her best to throw him off and almost succeeded, but in the end, it was Katsuki’s bulk versus her smaller frame. His leg throbbed slightly, but it was minor—it’d stop hurting in twenty minutes or so. She bucked against him, but when he sat on her ribs and pinned her hands above her head, it was over.

Ochako breathed heavily below him, thick gasping breaths—probably due to the combination of exertion and Katsuki’s full weight. 

He felt himself getting hard, and relished it. This was Ochako’s place—below him; red, flushed, and panting. He leaned over and ground his cock into the space between her tits, and Ochako squealed.

“What the heck are you doing?”  

“Isn’t it obvious?” Katsuki returned, amused by her filtered cussing. “You don’t know what a real man feels like. I’m gonna show you.”

“No.” Ochako’s breath hitched. “No, no—”

“Yes,” Katsuki corrected. He situated himself more firmly on her chest, made sure his grip was steady, and removed a hand to tug at his zipper.

“You—you can’t—” Ochako floundered. “Deku—”

“Deku isn’t here right now.” Katsuki snorted a laugh. “Are you serious? That’s what you’re thinking about right now?”

He unzipped, pulled his boxers down and out of the way, and grabbed his cock. Ochako’s eyes darted towards it, jaw slackening, before catching herself and snapping it shut. She refused to meet Katsuki’s gaze.

Not that her appreciation was unjustified. Katsuki’s cock was big; he’d always known that. In the locker room, the boys would either stare or avoid looking at it entirely. It was easier to ignore something if its existence wasn’t acknowledged, though Katsuki knew it weighed heavily on them whenever he changed. There was an intrinsic power in having a massive cock. 

Not that Ochako would know this, of course. It was Katsuki’s duty to show her. She struggled below him, but the intensity decreased with shocking rapidness. Maybe she was weak, or simply realized the inevitable. He didn’t actually care. People had to suffer in order to grow. Sometimes knowledge hurt before it was useful.

However, Katsuki had an inkling that didn’t apply here. The certainty that Ochako was a slut was rooted bone-deep. She couldn’t have a physique as supple and beautiful as hers without a degree of sexual desire. Her body, if nothing else, was honest. He told her so and observed her breathing grew heavy, cheeks staining red; pupils blown wide—from want or fear, he didn’t know. Sometimes, the two amounted to the same thing. 

Despite her verbal denials, maybe under all the hatred and disgust towards Katsuki and misguided affection for Deku… Maybe she wanted this too. Ever since facing him in the arena, returning his full strength with everything she had with a vehement expression of passion and rage—since then, his perception of her was revolutionized.

Although, he considered as she pointedly didn’t stare at his cock despite the bit of drool dribbling from the side of her mouth, it’s not like he actually cared. He had a goal here, and getting physical pleasure out of it was just a happy bonus.

“Look at you,” Katsuki said, deliberately eyeing her up and down. “You’re so flushed. I bet your underwear’s soaked.”

Ochako’s brows shot up. She tried to catch the saliva with her tongue, but it ran down her neck too fast, and her hands were pinned. “No…”

She tried to move her legs, and technically there was nothing stopping her. Katsuki felt more than heard her thighs shifting against each other. Her breath caught and her eyes filled with tears. A rush of heat went through Katsuki as he smelled her for the first time. The gym clothes were thin and did nothing to hide the scent of arousal. Katsuki wondered it was accompanied by a gush of slick, if Ochako fucking squirted herself because she was so turned on.

“Bakugou,” she said. “Please listen. I know what it looks like”— Smells like, Bakugou thought—“but I really, truly don’t want this.” She watched him intently, attempting a smile even as her lips twitched downwards.

Bakugou surveyed her. She was spread out before him, like a butterfly pinned under glass. Vibrant, captured. Katsuki was struck with a sudden desire to keep her—cuff her hands together, put her in a room enclosed with four walls and no window. Suddenly, he realized why Deku wanted to keep her private, all to himself. 

It was too bad Deku was too fucking weak to take what he wanted.

“You want this,” he decided.

“Please…” Ochako struggled and eventually met his gaze. “Please don’t do this.”

“Sorry, babe,” Katsuki shrugged, and now that he’d up his mind, it was obvious to both of them that he didn’t regret this at all. “I gotta show you what it’s supposed to be like. I don’t know what your pathetic excuse for a sex life has been until now, but I’m gonna remedy that.”

-

Part 2: Ochako

-

Ochako mouthed “remedy” under her breath before she caught herself, then said, “Wait, no! I don’t want this! Didn’t your mother ever teach you about consent?”

“I don’t know what your parents taught you,” Katsuki answered, crinkling his nose, “but my mother always told me to take what I wanted.”

“You have garbage parents,” Ochako said. It was a sad attempt at humor to conceal that she was terrified out of her mind. 

“Yeah, probably,” Katsuki shrugged. “They’re not here right now, though.”

Her mother had always advised her to have pepper spray, because there were terrible people in the world who liked to do nothing better than to prey on and defile the innocent. For the first semester at UA, she did, until she grew to trust her kind, helpful classmates. 

She even respected Katsuki. She admired his courage, his strength. However, his anger scared her, and she didn’t like his treatment towards Deku.

So why did she like when Katsuki debased Deku right in front of her, unapologetically unrepentant?

She was turned on, true, and she didn’t want this. Not because she didn’t want Katsuki, but rather because Deku was more perceptive than him by a marginal amount. Deku wanted to believe the best in people, especially Ochako. But the truth was, Ochako was a slut. Her body naturally attracted people. The stares in class and the gropings in the hallway and the ass-slaps on the street were normal—and moreover, her fault. If she didn’t have such a desirable body, maybe people wouldn’t want her the way they did.

Katsuki said her body was honest, and the worst part of it was that he was correct.

Ochako’s underwear had been soaked through ever since Katsuki had pinned her to the ground. She was so stupid, shifting her thighs like that. She’d wanted to hide it as long as she could, preferably forever. She was dating Deku, and it wasn’t fair to him that she got turned on so easily. It didn’t help that Katsuki was substantially bigger than Deku and much bulkier, and the way he pressed her into the grass made her pussy throb in the best way—

“You’re going to”—Ochako scrunched her eyes shut, then forced them open—“fuck me? Right here, right now in the open?”

“I’m not going to fuck you,” Katsuki told her, “though you and Deku both know you deserve it. I bet Deku wished that would happen. Bet he’d jerk off to me dicking you the way you were meant to be fucked.” He cleared his throat. “But I’m not a monster. This is what’s gonna happen: you’re gonna suck my dick, and I’ll let you go.”

“And”—Ochako was almost afraid to ask—“what will happen if I refuse?”

“Oh, that’s easy.” Katsuki grinned at her. “I’m going to shove my cock down your throat whether you want me to or not. The only difference is that if you struggle, I’ll tell Deku afterward what a slut you were. I’ll say you begged me to let you do it.”

“But that’s not true,” Ochako said, holding back tears. “That’s not true at all!”

“I’ll put it this way. Who do you think Deku will listen to, his whiny bitch of a girlfriend, or his”—Katsuki pouted, tilting his head to the side in an imitation of innocence—“well-meaning childhood friend?”

That, unfortunately, settled it. She had to prevent Deku from realizing her true nature at all costs. She could just imagine watching his face fall from a distance, Katsuki whispering in his ear. Deku’s eyes would dart to her, because he never could hide his emotions, and all that would be there was disappointment.

He’d have to break up with her afterwards. No well-meaning boy wanted a floozy for a girlfriend. She’d only gotten as far as she did because she’d obscured herself. Deku deserved better, and she’d cling to him and the lie she was living with everything she had.

Her mind made, she sighed. Just a small sigh, but Katsuki correctly interpreted it as a sign of submission and resigned acceptance.

She opened her mouth. Katsuki guided his cock inside, and she closed his lips around him. He wasn’t even halfway in, yet she felt like he was going to hit her throat any second.

He tasted—he tasted okay. More like skin than anything else, a little musky, a little bitter. She’d eaten worse chocolate. The problem was that she’d never given a blowjob before outside of her nasty fantasies, and now that the real thing was in front of her, she didn’t know what to do. She crossed her eyes trying to see the base, and Katsuki laughed at her, a deep, throaty sound.

She tongued it, trying to make it as good as possible, then it hit her. Why was she even trying to make it satisfactory? Katsuki was forcing her to do this without her consent. That was rape, right? This had to be rape.

Then why did she want to put her hand between her legs so badly? Why did she want to make Katsuki feel better than ever before, so he never wanted anyone else?

Your fault, she heard in time to the throb of her heartbeat. My fault.

Katsuki pushed his cock further and further into her throat, and she choked. She gagged and tried not to throw up, because something told her that Katsuki wouldn’t pull out even if she vomited.

She shouldn’t want this. She could blame this on her nympho body, but she realized on a fundamental level that something was wrong with her. Normal, healthy people didn’t get off on this. Ochako was sick in the head, adorned with a body that attracted everyone regardless of her mind’s intentions. Maybe it wasn’t her mind, because it told her that she wanted this—it was her conscience that told her no.

“Aren’t whores like you supposed to deepthroat?” Katsuki said, and shoved deeper. Ochako tried to answer, but it was muffled. “No, don’t talk. It just means that you need practice.” 

Ochako didn’t want practice, she wanted to go home. Her underwear was so wet that she feared she’d have to wring it out before doing laundry, and her throat ached. Katsuki let go of her arms a while ago, and while her wrists tingled with numbness, she did her best to push his torso away.

Katsuki didn’t budge; in fact, he started laughing as if the thought of Ochako attempting to fight back was the funniest thing he’d heard all week. 

“Oh, you fucking slut,” he said, wiping away tears of mirth. “Shut up and take it like you’re supposed to.”

Then the real throat fucking began. Ochako closed her eyes and suffered through it, each thrust into her throat a mockery of the pounding below. In a way, she wished Katsuki was fucking her pussy instead —at least that was built to be screwed.

It continued for an indefinite period of time. Ochako was present for all of it. Spit covered her face, her throat was sore, and she couldn’t breathe. She didn’t think she could do it much longer. Then—

“I’m gonna come in your mouth,” Katsuki said lowly, and she squeezed her thighs together. “You’re going to be a good bitch and swallow it. If you don’t, I’m just going to keep my dick in until you do. You could keep my come in your mouth, but you’re probably going to choke, and I’d let you suffocate.” He winked, thrust in twice more, and came a significant volume of thick, bitter come in her mouth. “You know I would.”

Ochako swallowed immediately.

She shuddered through it. It was thick, sticking as it went down. Katsuki pulled out when he finished, standing up as he got off her. She continued to lay on the grass, drool mixed with diluted come leaking out the sides of her mouth, and caught her breath.

Katsuki eyed her. “You’re panting just from that? You really are a slut.”

Ochako cast down her gaze in shame, and wiped off her face with her shirt.

“Bet you’d love it even more if you actually got fucked.” Katsuki bent down towards her, lowering his voice even though there was no one around. Gravely, conspiratorial. “Don’t you want to see what a real man feels like?”

She did, but she didn’t. Katsuki made the decision for her when he said, “Actually, I decided that you have to. Otherwise, I’ll tell Deku.”

“I don’t want this,” Ochako said hoarsely, but it was weak. Her voice trembled, and all she could think of was Deku. She couldn’t let him know what she really was. It’d ruin her life.

“You’re a little bitch, right?” Katsuki told her, and extended a hand to help her up. She took it, standing on shaky legs. “It’s just like you’re in heat. You want to be your knees with your legs spread, begging for it.”

Yes, Ochako thought, and nodded. Yes, I want that.

“What a fucking whore.” Katsuki chuckled. “C’mon. Let’s go to Deku’s bed. I’m not up to blasting the door open, but I’m sure you have a way in. He seems like the kind of cuck that gives his girlfriend full access to his room.”

Ochako fingered the second key on her lanyard, and crushed her anticipation.

-

Part 3: Izuku

-

They had to be somewhere.

Izuku sat on the bleachers, picking at his uniform’s seams anxiously. Their training session at the track ended ten minutes ago, and Ochako still hadn’t come back. A part of him told him that he was being ridiculous; he should go back to the locker room to change, but another whispered, Danger.

He had nothing to worry about, right? Katsuki wouldn’t do anything to Ochako. Kacchan was amazing, after all.

It didn’t matter that Katsuki was better than Izuku in virtually every way. He was bigger, faster, stronger, more attractive. Izuku was just Deku, and much less desirable than a blond, muscled—

He cut off his train of thought. Ochako wouldn’t do anything. He wanted to trust her, so he’d given her a key to his room just like that relationships for dumbasses book said. Everything in their relationship was going absolutely fine; he’d analyzed every aspect to the wazoo and came to the conclusion that Ochako was a pretty, normal girl, and he was lucky to have her.

She’d been the one to ask him out, after all. He could have never! If it’d been up to him, he would’ve pined after her for three years, graduated, and never seen her again. Even as it was, he stuttered so much trying to get out a simple Yes! that Ochako had taken pity and shoved her tongue down his throat.

He picked up his gym bag and went to the locker rooms to change. He’d go back to his room, drop off his gym gear, and get some dinner. Maybe he’d see Ochako there. 

He walked to the dorms, and every time his bag thumped against his thighs, it felt like the ticking of a clock. He itched to walk faster but forced himself to maintain a slow, steady pace, because everything was absolutely fine. 

He entered the common room, called the elevator and punched in his floor number, and waited in the silent box with only metal walls for company. The doors opened with a ding. 

Izuku stepped into the hallway and heard... something. It was odd, because it was a noise he knew well, but the misplaced sounds were strange when coming from somewhere unexpected. He’d only heard this from his earbuds, or—when he was feeling brave and the dorms were empty—his computer speakers. Because it sounded an awful lot like—

He walked down the hallway, bag scratchy against the calf where his pants had ridden up. It was coming from his door. He fumbled out his key and shakily put it in the lock after several tries, and turned it. He pushed the door open.

His bag dropped from numb fingers at the same moment his mind went blank.

He couldn’t process the scene in front of him. The optic nerves sending signals to his brain told him that his very naked girlfriend had her legs wrapped around his childhood friend, and that said childhood friend had his dick out of his pants and was about to enter her. That couldn’t be true, because it went against every known fact about the universe Izuku had deemed true. 

Apparently, he’d taken them for granted.

“Ochako?” Izuku said tremulously. “What are you doing?”

Katsuki snorted at him. “You’re always going on about how you’re so smart, Deku.”

“Tell me this isn’t what it looks like,” Izuku begged. Tears gathered, blurring Ochako and Katsuki until they became one. “Ochako wouldn’t do this. She’s—she’s not”—his breath hitched—“she wouldn’t.”

Katsuki sent him a look that could’ve been perceived as pitying if Izuku didn’t know better, so Izuku stared at Ochako instead.

He didn’t know what he wanted to see. Repentance, embarrassment for the fact that he had caught them on his own bed, humor at the situation, or—or—

He only saw a terrifyingly concrete arousal. It reshaped something integral inside him, rewired his brain so that the neurons shot differently. Ochako was—Ochako was a— 

“C’mon, Deku,” Katsuki sneered at him. “Don’t you want to be a part of this too? I know you get off on feeling useless, but you might as well help.”

Izuku trembled. 

“Do something,” Katsuki said. “Don’t just stand there. Make yourself useful.”

“Ochako?” Izuku asked tentatively, because a part of him hoped that this was a bad wet dream.

“Deku,” Ochako said. She blinked, long lashes fluttering. “Help Katsuki.”

“Are you—are you sure?”

“It’s okay.” She smiled so wide. “Deku, honey, be a good boy and do as Katsuki says.”

Izuku felt pathetic and very strange, because this was Kacchan —but he’d do anything that Ochako asked of him if it made her happy. He shakily approached Katsuki and grasped his cock in one hand. He almost added a second, because it was big to an unimaginable size, but that would’ve been too embarrassing. He wrapped his hand around as much of it as he could and guided it to Uraraka’s pussy. He directed the tip to the entrance and kept his hand in place as Katsuki began to push in.

Trembling, Izuku watched Uraraka’s face. The stretch as her virgin pussy was penetrated was obvious. It must’ve been excruciating, Katsuki’s cock being the size it was. Izuku had the first-hand experience of watching Uraraka’s face scrunch up in pain, then slowly relax as it faded away. Her head thumped back onto the mattress. She started shifting her hips in slight forward motions, like she couldn’t wait to have it inside of her. Her breaths came in breathy little gasps as she took everything Katsuki had to give, inch by glorious inch.

When Katsuki was about three-quarters of the way in, Izuku almost couldn’t hold on anymore because of how terribly his hand shook. Just another couple of inches and his hand would touch the lips of Uraraka’s pussy. He saw the slick running down around Katsuki’s cock and in between her thighs; the scent as prominent as the visual. He stilled in anticipation, because he was terrified of what was about to happen, but he was sure they’d be soft—fresh and wet—

Katsuki surprised him by barking, “Move it, Deku,” and Izuku was so surprised that he drew his hand away without even thinking. 

“Yeah, that’s it,” Katsuki groaned as he bottomed out, and Izuku didn’t know if it was directed towards him or Uraraka. “Fucking take it—”

Izuku took a step backwards, stumbling, because it just occurred to him that Katsuki was fucking his girlfriend. His massive cock was going to rip through her virgin hole, make a space inside her that wasn’t there before; for him, and only for him.

“That’s right, Deku,” Katsuki said. “Couldn’t have said it better myself.”

Izuku closed his mouth shut at the same time Katsuki snapped his hips forward.

Ochako screamed.

Izuku had never been fucked before, hadn’t ever taken it up the ass besides the few fingers he’d stuck up there when he was feeling especially pathetic. He couldn’t imagine what it would be like to be fucked within an inch of his life.

Fortunately, he didn’t have to.

Katsuki held Ochako’s hips so firmly that his grip was going to leave dark bruises when he was done. He thrust so hard that her body visibly rippled. His teeth were bared—aggressive, primal—and his eyes were intensely focused on Ochako’s tits.

They were beautiful, just as much as every part of Ochako was; delicate at first sight, but fierce and wild underneath the layers.

“Oh,” Ochako moaned, “yes, yes, yes— fuck me!”

Izuku wondered what that was like, to be so desperate that inhibitions were gone entirely. Ochako looked like she was getting railed within an inch of her life and loving every second of it.

“Shit, go deeper—yes, there, there—”

She wrapped her legs around Katsuki; Katsuki paused for a moment, drawing out, and she whimpered, actually whimpered like every second Katsuki’s dick wasn’t in her caused physical pain. Katsuki grabbed her left leg and hiked it up against his shoulder. Now Ochako was spread open even wider, and somehow she became lewder; pussy wide open and gaping. Katsuki didn’t even have to guide himself. Her cunt just swallowed and sucked him in.

“Mm,” Ochako whimpered, “it’s so big—”

Izuku’s cock was too small to be called a cock. It was a dicklet if he was being generous. What was he thinking, dating Ochako? He could never satisfy her the way she was meant to be satisfied. He was small, pathetic, and useless. His rival, the boy he’d known since childhood, were vigorously fucking his girlfriend in front of him, and all Izuku could do was fondle his dick through his pants. He should stop this, but it felt too good. He’d started this, and now he’d see it to completion.

He couldn’t help but think that this was his fault. That if Izuku was big, strong, good enough, then he might’ve been able to keep Ochako. He’d claimed her, sure, but it obviously didn’t have merit if Ochako spread her legs for the first boy who demonstrated interest. 

Izuku was useless; felt pathetic. If only he was strapped with a big cock that gifted him the confidence to latch his teeth and take what was his. He wished that he was adorned with muscles and a machismo air, exuding an alpha demeanor. Like Katsuki. 

That was it. He wished he was like Katsuki.

No one would dare take what he claimed or steal what he’d found. Izuku could take his pick of fruit from the Garden of Eden and reap what he sowed without being cast out. The heavens would smile upon him, and he could finally know what Ochako’s delicate pussy felt like when it squeezed around his cock in its delicious, untouched state.

But Izuku was small, weak, and pathetic. He didn’t deserve to be the dirt on the bottom of Katsuki’s shoe, much less touch Ochako. Izuku couldn’t do anything right, and he never would. He couldn’t even keep the thing that was most precious to him. She was getting screwed by a man adorned with the best, and loving it with every fiber of her being. 

Izuku was so lucky to even be in the room. They hadn’t thrown him out yet, and for that he was grateful. His very eyes weren’t good enough to observe the display of pleasure, of sensuality—no, of carnality that was occurring. He was an intruder to something much larger than himself; a scene between deities. He wondered if he might bleed from the eyes or burst apart from observing something so far above him.

He told himself that he wanted, needed to leave, but in the end, it just wasn’t true. Izuku was going to stay in the damn room scrabbling for crumbs, drowning in inadequacy, and taking pleasure in the utter humiliation of his girlfriend getting fucked.

“Mine,” Katsuki snarled with the hungry expression of an animal about to rip their prey apart, and came inside her.

Izuku wondered if this would be the last time that he saw Ochako as anything other than Katsuki’s fucktoy. 

There was no going back after this. Ochako was in visible ecstasy, writhing on the bed. She came without ever once touching her clit. Katsuki humped her through it, hips shuddering as he poured his seed in and spread it inside her. Izuku seriously contemplated the possibility that Ochako might become pregnant. Katsuki’s come had to be as virile and potent as the rest of him. Ochako was young and fertile and desperate for it.

Just for a moment, Izuku imagined Ochako filled like she was meant to be. Stuffed to the brim and swelling. About to burst like an overripe fruit in the sun, in ecstasy at the pleasure of being in someone else's service. A personal cumdump; legs spread wide, pussy exposed and oozing someone else’s come. He swallowed hard and took his cocklet out of his pants.

Katsuki glanced over at Izuku’s dick and scoffed. Izuku’s face burned in humiliation as Katsuki then pulled out of Ochako, dropped her legs onto the mattress, and aggressively manhandled her onto her stomach. Ochako didn’t protest, turning over without a word. She lay flat even as she pushed her hips up, spreading her legs as she presented her gaping pussy, dripping with Katsuki’s come.

Katsuki glanced up and down her body. Then, quick as a snake, he slapped her ass with a meaty smack. Katsuki pulled his hand back, and he hit her again and again. 

“Take it, you fucking whore,” Katsuki said, but it was like talking to empty air. Ochako remained completely silent through it, hiding her face in the mattress. When Katsuki stopped, her ass shone bright pink with visible hand marks.

Izuku wanted to ask if she was okay, because her stomach and shoulders were heaving. But before he could, Katsuki pulled apart her ass cheeks and spit on the hole. That was when Ochako lifted her head up, and Izuku noticed the tears and her blotchy cheeks, almost as red as her ass. 

She moaned, long and loud.

“Do you want me to fuck Ochako’s ass?” Katsuki asked, and Izuku realized with a jolt that Katsuki was addressing him.

“Uh,” he said. He did, very much so, but a part of him shrieked that it should be him behind Ochako. 

His gaze darted to Katsuki’s cock, dripping with a mixture of his semen and Ochako’s slick, and he didn’t realize he was staring until Katsuki said, “Well? This is the only way you’ll get to participate, so you might as well take advantage. It’s not like Ochako will ever let you fuck her after this.” 

Izuku—Izuku couldn’t. He had to put a stop to this. He’d watched Katsuki tear Ochako’s virginity from her, and now he was asking him—Izuku!—for permission to take her from behind. 

A part of Izuku knew that Katsuki wasn’t really asking. Katsuki did whatever he wanted, regardless of what Izuku chose. This was a win-win for Katsuki: he either complied with Izuku’s request, or he proved that he didn’t care about Izuku’s pleas and humiliated him anyway.

Izuku’s cock throbbed. He jerked it faster.

Katsuki narrowed his eyes. “Well?”

“Fuck her,” Izuku choked out. “Fuck her, fuck—p-please fuck her—”

Katsuki shrugged. “Okay.” He spread Ochako’s ass and lined up his cock. “Hear that, skank? Your boyfriend begged me to fuck your ass.” 

He pushed in, bottoming out in one go, and Izuku winced. Ochako yelled in pain, her untouched asshole violated from Katsuki tearing a space within her.

Katsuki shushed her gently, and pulled out. There was blood on his cock. He pushed back in. “It’s alright, whore. It’s okay. Just take it.” 

“It’ll feel good soon,” Izuku said despite himself. He could feel that his eyes were wide as saucers, but he still continued. “You know why?”

Katsuki grinned at him, and finished, “Because I am here.” He reached down and grasped Ochako’s tits, fondled them in his hands as he pinned her against the bed, and started fucking in earnest.

Izuku was right. Her gasps of pain turned into pleasure. Katsuki’s hips bucked as he bred her like an animal. He lay on Ochako’s back, completely dwarfing her, and attached his mouth to her neck, licking and biting. 

She was brought to orgasm frequently and with mind-blowing intensity. She arched her back as best as she could and screamed when she climaxed, and fell back onto her stomach. Katsuki yanked Ochako’s body opposite to his movements, and his cock was large enough to always be inside her. Ochako—beautiful, intelligent, powerful Ochako—was reduced to a mindless whore, drooling into the mattress.

So that was the power of a massive cock.

“What the hell are you still doing here?” Katsuki asked.

Again, it took Izuku a second to realize that Katsuki was addressing him.

“Um,” he said, his brain desperately trying to tear itself away from the scene in front of him and instead form words. “Uh—”

He didn’t want to go. He was watching Katsuki fucking Ochako and actively jerking off to it, so close to coming that his balls ached. It was everything he feared, so why did he feel like everything he’d ever wanted suddenly came true? Except now Katsuki was telling him to go away, and Izuku—Izuku couldn’t do that. He’d told himself that he’d see this to the end, and that was what he was going to do.

“C’mon,” Katsuki said. “What are you, a pervert? Show’s over. Stop watching and get out.”

Izuku, unbelievably, began crying. He’d hoped if he was quiet and unobtrusive, then he could slip under the radar.

“Ochako?” Izuku said desperately. “Ochako, don’t make me go.”

“Lock the door on your way out,” Katsuki said. He flipped Ochako onto her back once more, and resumed fucking her. She wrapped her legs around him, mouth in a silent howl.

“Please.” Izuku felt tears stream down his cheeks, nose congested with snot. He was filthy, pitiable, and miserably turned on. He was the only one who hadn’t come yet.

“Deku,” Ochako said, opening her eyes with difficulty and turning her head to look at him. “Deku—Izuku. Look at me, honey.”

“No,” Izuku groaned in desperation, because he was so goddamn close, “no, please— please—”

“You need to go,” Ochako said. “It’s over. You understand that, don’t you? You lost the game because you didn’t know how to play. I’m Katsuki’s now. It’s so good, Izuku—you don’t understand how big he is. We both know you could never measure up, right?” She didn’t wait for him to answer. “You’re just not that type of person. You need to go now.”

A sob escaped Izuku’s mouth, and he let it. His greatest fears and regrets, all together and neatly packaged, said to his face by the girl he loved most.

 “I’m sorry, Izuku,” Ochako said, and she wasn’t even looking at him anymore. There was a wide grin on her face, and her body jolted forwards and backwards from the pounding that she was taking. She gasped at a particularly strong thrust. “It’s too good. Katsuki’s just too big. He’s fucking me so well. You could never do that, right? You never could, and now you never will.”

Izuku didn’t respond, one hand over his mouth and the other furiously jerking his dick. He was pathetic. He was useless. He was a sorry excuse for a boyfriend and a person, and he deserved to have everything taken from him. This was inevitable—he was moronic for not seeing it sooner. Then he could’ve appreciated it while it lasted. But now, it was too late. She was gone. Katsuki had everything, and left Izuku with nothing. This was how the future was meant to be.

“We both know you can’t do anything,” Ochako said, and fisted his sheets. “But it’s alright. I’m happy. I didn’t think this was right at first, but Katsuki showed me that this is everything I’ve ever wanted. You could’ve been a part of this too—but I’m sorry. You’re just not good enough.” Ochako sighed. “Maybe in another universe, we could’ve been happy together. But this wasn’t enough. You weren’t enough for me.”

Izuku stroked himself frantically, because he had to—had to— 

“So please, Izuku,” Ochako said, kind and earnest, “enjoy yourself one last time.”

Izuku let out a wail as he came pathetically into his hand, cocklet spurting useless come. He didn’t dare close his eyes, too hell-bent on wringing every last drop he could.

Then... he left. Zipped his fly shut, wiped his disgusting hand on his pants, turned on his heel, and walked out of the room. He shut the door and locked it. What else could he do?

The steady smacking of Katsuki screwing Ochako followed him out of the room and into the hallway, until it eventually faded. Izuku slumped against the nearest wall, put his head in his hands so his vision went dark. He replayed images he was revolted to realize that he fervently wanted to see, echoing Ochako’s last words, barely audible above the sounds of their fucking: “Bye-bye!”

Thank you for reading!


Here is a short analysis.

My beta highlighted, That was it. He wished he was like Katsuki, and wrote: I'm getting the feeling that—rather than being jealous of Katsuki—he's jealous of Ochako. It sounds like he wants Katsuki to fuck him into oblivion even though he doesn't know it yet

I responded:

THANK YOU. THAT IS EXACTLY WHAT I WANTED TO GET ACROSS. This is a rewrite of another fic. Not a more nuanced version—just one in my own words. You see that neither of Bakugou or Deku are actually attracted to Ochako—at least not beyond superficial. Katsuki talks about Ochako's tits, but it's all really a set-up for what he really wants: Deku's complete and utter humiliation.

I kind of do Ochako dirty here, and you see that her section is much shorter. Her big "discovery" is that she's a slut, and that's taken directly from the original fic.

Deku's section is really the one that shines. He loves Kacchan, in a really unhealthy way, and thinks that he deserves to have everything taken from him because Kacchan is "better."

In addition, I highlighted, “So please, Izuku,” Ochako said, kind and earnest, “enjoy yourself one last time.”

I commented:

You see here that this is the climax (literally). Izuku is being told he's pathetic and useless—confirming his worst fear and biggest arousal—by both the girl he respects and the boy he has an unhealthy opinion of. We've regressed instead of progressed, and Izuku ends up in a worse state than which he's started. He's had everything taken from him, because he had so little confidence in himself that it was easy for Kacchan to take Ochako away. Even though it's technically rape, Ochako gets into it really quickly, which is suspicious because it shows her opinion of Izuku isn't as high as we and Kacchan thought it was.

That's what makes this fic grossly satisfying for me: the realization that Izuku thinks that this is his fault. It's victim-blaming, and purposefully, disgustingly so. I know it turns most people off, but it works for Izuku's pathetic nature—not canonical in the least—that I was trying to emphasize.

I think, along with the morally reprehensible content, that I lost a large portion of my audience because the sex isn't explicitly m/m. Strangely, I think that if I had switched out Uraraka with a boy, I would have had a bigger reception.

Notes:

This is my contribution to Kinktober, except I don't have to time do 30 days, so you get 7k.

I strongly recommend looking up the lyrics to the song linked above. I wrote this in 3 days. I have many things to do, and I spent 8 and 5 hours respectively writing and editing this.