Work Text:
“Ohh, fuck, Step-Bro—”
Megumi slams Yuuji’s laptop shut.
Really, in hindsight, he shouldn’t be surprised. Yuuji is a real pervert, he knows this. He has pinup posters all around his room, physical copies of eroge piled up on his desk, an actual, unironic boob mousepad for God's sake. Him watching some taboo gay porn isn’t exactly out of character.
But when Megumi is his Step-brother, as of a couple months ago when Megumi’s father quickly got with, engaged, and married Yuuji’s mother (who is so, so out of Toji’s league), you can’t exactly blame him for being a little scandalised.
Megumi doesn’t have his own laptop, so he borrows Yuuji’s on occasion, Yuuji lets him, it’s chill. Megumi respectfully ignores the various porn links in his Google search history.
He can’t really ignore it now , when it’s the first thing he sees when he opens the browser. Yuuji didn’t even have the dignity to close the tab.
Yuuji is attractive, he won’t deny that. All tan-lines and hard muscle, boyish grins and faded facial scars with unknown origins. Megumi’s seen him in just a towel hanging low on his hips more than once, steaming and wet from a shower. The way he’ll slick his hair back to stop water from dripping onto his forehead.
Megumi covers his face with his hands, contemplative. This wouldn’t be his weirdest lay, arguably. He’s fucked way older guys before with the promise of money after, having sex with someone roughly his age who he hasn’t even called brother yet wouldn’t be the worst thing.
He bets Yuuji would fucking love Megumi to call him brother. A whispered: ‘Can you help me with something, Yuu-nii?’ and he’d be hard as a rock, stumbling over a ‘ Yeah, ‘course Megumi,’ while he grabs a pillow off the couch to hide himself.
Megumi would corner him in the kitchen, bend over against the man’s bulge and plead with him to just fuck him already. Yuuji would grasp Megumi’s hips, grind against the curve of his ass and slap a hand against his mouth when Megumi whines cause, ‘ You don’t want Mom to hear us, do you?’
His pussy clenches around nothing, he can feel his underwear grow damper the harder he thinks about it— Yuuji could probably hold him down, make him take it— fill his womb, cum inside him so hard he can feel it in his throat—
So, it isn’t his fault when his hands drift into his sweatpants and two fingers circle his clit; it’s Yuuji’s. Sexy, dumb, step-brother Yuuji who awakened something in Megumi via corny fauxcest porn on his shitty, halfway to breaking down laptop.
He imagines thick fingers replacing his own and soft condescending whispers against his throat as Yuuji sucks bruise upon bruise into his neck for everyone to see.
Maybe Yuuji would confront him instead. He’d slam Megumi against a wall, erection poking against his leg as he asks if Megumi knows what the fuck he’s doing to him. Of course he does. Yuuji would huff out a laugh, grabbing his face when he says: “Get on your knees, then.”
Yuuji would slap his cock against Megumi’s face, smearing his cheek and the dusty pink of his lips with precum before thrusting in without warning. Yuuji is big, Megumi can tell, but it’s alright. Nothing he can’t handle. He’d keep eye contact while Yuuji fucked his throat, encouraging rough hands to use the messy strands of his hair as handlebars.
He wants Yuuji to tell him how good he’s being, how well he takes his Big Brother’s cock (Maybe he’s into this a lot more than he thought, dammit Yuuji), it’s like he was born for this. Megumi would hum against Yuuji’s dick, little affirmations as he’s bobbed up and down against the shaft.
Megumi whines, teasing a manicured nail against his hole before pushing it inside. It feels good, but not enough, quickly adding one, two more fingers until three are stuffed snugly in his pussy.
His fantasy jumps, and suddenly they’re fucking in Megumi’s bed. Yuuji pulls Megumi’s legs up, effectively folding him in half as he jackhammers into him. He’d have all the desperation of a teenage virgin, and Megumi can only hope his cock would be big enough to reach his cervix from that angle.
Yuuji would lean down, folding Megumi even further, and ask him with a pleading lilt to his voice if he could cum inside. Megumi’s on T so it’s fine, right? He doesn’t think he’ll be able to pull out, please Megumi?
Megumi would let him— it’d be fine. Probably. He doesn’t doubt Yuuji is into some breeding kink type shit anyways.
“Gonna knock you up. You’d like that, wouldn’t you? God, Toji-san would kill me.”
Megumi begs in return, “Please, Yuuji, fuck— cum inside. Fill me up,” his fingers speed up as Fantasy-Yuuji thrusts impossibly harder. He laps up the tears that spill down Megumi’s cheek, cooing and assuring that he’s being so good for his brother. Megumi keens. He feels the closest he’s ever been, like a massive jug of water seconds away from tipping off the edge it’s been perched on, soaking any poor bystanders that are walking past at the wrong time.
“I wanna hear you say it, Megumi please? Say it for me,”
Megumi’s fingers curl up and hit his g-spot just right, and suddenly his back is arching, little fireworks blowing up with large bangs behind his eyes—
“Nii-san, Nii-san-!” And Megumi’s cumming, transparent liquid staining his soaked fingers and the bedsheets below. He trembles through it, legs stuck shaking even in the afterglow as he pulls his digits out with a humiliating squelch.
Megumi grimaces. Pulls out a tissue from the box laying on his bedside table and wipes himself down with a lot less shame than he should be feeling.
He never claimed to be a good person, though.
Call The Devil and He appears, as soon as he’s done cleaning himself off and shuffling his underwear back on, there’s a sudden loud, piercing knock at his door.
“-Megumi? ‘Megs! Do you have my laptop? You better not have been using it to jerk off, dude.” Yuuji shouts— it’s a joke. A joke. Megumi feels exposed all the same.
“Shut up, I have it, hold on.”
And if Megumi forgets to put his sweatpants back on, leaving him clad in only short black boxers as he greets the boy at the door who’s suddenly very enthusiastic to leave him alone, it’s not his fault. It’s Yuuji’s.
He sighs when Yuuji slams his bedroom door shut with a “Thanks, Megs!” Belatedly, Megumi realises—
He can’t not fuck him.
So, Megumi devises a plan. How to get your step-brother to fuck you without seeming like a total creep. He thinks of doing the age-old Step-broooo, I’m stuck in the washing machine, help me, but that feels a tad bit obvious, even for him.
Tiny shorts aren’t out of the picture, though.
He hasn’t worked out in months, hasn’t worn those dark blue gym shorts in even longer, but he’s going to walk the dogs anyways; might as well take the opportunity.
Megumi connects a dual leash to Kuro and Shiro, two massive wolf dogs that Toji gifted him when he was a little kid. Toji never especially made an effort with them, but they’re practically Megumi’s sons at this point. He makes a fuss out of both of them, spluttering and giggling out a, ‘c’mon, stop it!’ when the hounds try licking at his face. He’s letting himself get distracted.
The true goal of the day: get Yuuji to look at his ass in these shorts.
Admittedly, there’s not much to look at. He’s— for lack of a better word— flat. But these shorts make his legs look fucking good and the small of his waist hugged by the elastic makes up for the lack of curves down there.
If his search history is anything to go off of, Yuuji likes scrawny little twinks anyways. He’ll be fine.
Yuuji’s sitting on the couch, scrolling on God-knows-what on his phone when Megumi walks in, two overeager dogs in hand. He looks up, disinterested expression gone as his eyes go up and then- down, down, down.
“You-” Yuuji’s voice cracks. He clears his throat, “You going out?”
Megumi hums, leaning down to pet Shiro's head. “Mmhm. Gonna walk the dogs.” He looks up at the older through his eyelashes, all seductive and cat-like, head still bowed down facing the hounds.
There’s a pause, like Yuuji’s debating on speaking up about something. He purses his lips, breaks his stare with the other.
“Like that?”
Bingo.
Megumi can’t help the grin that comes over his face. “I don’t see what the issue is.”
“Just, like, y’know—“
“Know what?”
“—the shorts. They’re,” Yuuji clears his throat again, his eyes flying to look anywhere but Megumi. “short.”
Megumi snorts. He makes a show of getting back up, shorts hiking right above his thighs. “Are they?” Pretending to contemplate, he snaps the hem of his spandex against his leg. A loud snap echoes across the room, Megumi swears he sees Yuuji jump.
Megumi’s a little too excited to see Yuuji so flustered. It looks like he’s seconds away from breaking out into a hot sweat, face red and rubbing his hand against the back of his neck. It makes Megumi want to coo at him, but he won’t. Yuuji’s meant to be the worked-up one, not him.
“Yeah. A little.” Yuuji can’t help himself, and his eyes wander down to stare at pale, defined legs. Megumi can tell he’s committing it to memory.
“Well, I won’t be out for long, so it’s fine.”
Yuuji grunts. “Uh-huh.” Another pause. And then, “Be safe.”
Oh, Yuuji’s so gonna jerk off to this as soon as he leaves. He’s so obvious. If he doesn’t while Megumi’s gone, he will tonight. Yuuji taps his fingers on the inside of his thigh, self-soothing.
Again: so obvious.
He huffs out a dry laugh, “I will, Yuuji. Don’t worry.”
And just like that— Megumi walks out the front door, Kuro and Shiro in hand, and leaves. He pays no mind to the lingering stare he receives from Yuuji as he leaves the room, or the way as soon as Megumi leaves into the corridor he can hear Yuuji sigh. Probably runs his hand through tufted-up pink hair, leans against the couch. He shudders.
After a few weeks (multiple fucking weeks! Megumi thought he was hotter than this), an issue arises itself.
Yuuji will not fuck him.
Like, seriously. Won’t even entertain the idea. In fact, Megumi thinks he’s been touched less. He’s perplexed to say the least. Yuuji’s a pervert. A very big one at that. Pervs can’t have enough dignity to not fuck a pretty piece of meat when its dangled infront of them like they’re a starving tiger.
But, apparently, Yuuji’s morals are far higher than his— cause despite all the teasing, the skimpy outfits, the asks for help when he really doesn’t need it, Megumi literally hearing Yuuji get himself off in the later hours of the night— Yuuji’s too good of a step-brother to snap and bend him over.
It’s kinda pissing Megumi off. Pissing him off a lot, actually. Megumi is so pent up, and what started as a little scandalous game to get Yuuji to have sex with him has descended into a fully blown, serious crush on the man, so he’s even more frustrated. He thinks he’s jerked off more in the last couple of weeks than he’s ever had in his whole life.
Desperate times call for desperate measures, so he edits his plan.
Enough beating around the bush. Maybe Yuuji is stupider than he thought, and hasn’t picked up on Megumi’s— quite frankly, obvious— flirting attempts. He has to get direct.
It doesn’t take him too long to think of something.
Megumi waits a couple of days after that, until his father and Kaori announce that they’re doing their monthly date tonight. It’s kind of admirable, really, that they still do cute little nights out with each other. He doesn’t think Toji’s made this much effort with anyone before.
Yuuji will be coming home late from his shift— Megumi knows, he has his schedule— and by the time he’s back, Kaori and Toji will be gone. They’ll be alone for hours, possibly the whole night. It’s so perfect, Megumi pinches himself on the arm to make sure he’s not dreaming it all up.
When he says goodbye to their parents and practically slams the door on their face, he gets to work.
Megumi grabs a freshly worn shirt from Yuuji’s washing basket (it’s not creepy, shut up), the sexiest pair of underwear that he owns, little white lace panties with a pink bow in the middle and everything, and some washed-out graphic tee that doesn’t cover his crotch in the slightest. It’s slutty, yes, when he looks himself over in the mirror he thinks it’s the most whore-ish he’s ever looked, but it’s for a good cause!
He genuinely thinks if he doesn’t get Yuuji’s cock in him by tonight, he’ll die.
Before he can start having second thoughts about this whole idea, Megumi’s falling into bed with Yuuji’s shirt in a tight hold. He huffs, and the scent is enough for hot slick to pool down into his panties. It’s intoxicating, the smell of Yuuji’s musk imprinted onto the thin fabric. Yuuji probably worked out in this.
Ugh, Yuuji working out.
Megumi brings his fingers under delicate lace, circling his cunt before thrusting 2 digits inside immediately. one hand clutches Yuuji’s shirt, pushing it against his nose.
He sighs out. When Megumi closes his eyes, it actually feels like Yuuji’s there with him. like Yuuji is the one massaging his inner walls, so close to Megumi that he can hear his heartbeat and smell Yuuji’s sweat sticking to tan skin.
Megumi forgets the time, focuses less on chasing the high of an orgasm and more on the distant pleasure of poking his insides while he loses himself in his step-brother’s smell.
There’s a knock on the door— Megumi barely registers it. He doesn’t take notice of it at all, actually, just stuffs his fingers farther inside and searches for his G-spot. Arches his back and lets Yuuji’s tee fall on his face when he finds it so he can grip at the bedsheets.
A muffled voice. The loud squelching of his cunt overpowers it.
“—gumi, I know you’re in there, c’mon-”
The door swings open before he can think. Megumi snaps his head up and Yuuji’s shirt falls down to his chest.
Speaking of Yuuji: there he is. Right there. Standing in the doorway, staring right past Megumi’s spread legs to look at his pussy, juices dripping through see-through panties and digits pushed into the knuckle inside.
“Yuuji.” Megumi whimpers out.
Megumi genuinely couldn’t tell you what happens between him speaking up, and Yuuji jumping onto the bed and bringing the raven’s legs so high up they’re up to his fucking ears. Yuuji’s clothed bulge nudges against Megumi’s core.
Yuuji speaks, and he actually sounds like a wounded animal. He’s letting out little feral, animalistic noises, looking down at Megumi like he’s prey. It makes him light headed.
“You fucking,” Yuuji forces Megumi’s hand out of his underwear, replaces it and cups Megumi’s pussy like its a bulge. Possessive . Megumi keens. “Minx.”
“Was trying to be a good big brother, felt so guilty getting worked up over those little outfits— but that’s what you wanted, wasn’t it? Fuck, Megumi. You’re a pervert.”
Megumi wants to protest, because objectively Yuuji is far, far worse and started all of this to begin with, but the second he opens his mouth Yuuji grinds his palm over his cunt and all that comes out is a garbled moan.
Yuuji coos. “It’s okay. I’ll give you what you need,” he leans down, the stretch of Megumi’s legs burns, it makes him cry out even louder. “Nii-san will take care of you, yeah?”
Megumi’s already a little out of it, if he’s being honest. It’s all just. So much. He can still smell past-Yuuji’s shirt if he focuses, and now present-Yuuji is looming over him, letting Megumi rut against his hand.
“Grinding against me like a dog in heat. You’re unreal.” Yuuji laughs dryly, like watching Megumi all desperate and needy is entertaining to him. Maybe it is, maybe Yuuji’s more of a freak than Megumi thought.
Yuuji snakes his hand up to the hem of the fancy lace, toys with it like he’s debating something. “How expensive were these?”
God, clearly Yuuji has never lingerie shopped for a girl before, because panties this sexy are expensive. Megumi isn’t exactly articulate enough to say that though, so he simply hums and shakes his head lightly.
“Gonna assume that means they were cheap.” And—
Yuuji just. Rips them. Like it’s fucking nothing, like it’s not the horniest thing Megumi’s ever seen in his life. Porn can go in the drain forever now that he has the vision of Yuuji being so impatient he can’t even take Megumi’s underwear off like a normal person.
If Megumi could have those stupid heart eyes that girls in hentai get when they’re getting fucked, he can guarantee he’d have them right now.
He whines, because how could he not after that, rubbing the folds of his bare cunt against Yuuji’s front. Megumi feels a little (a lot) pathetic like this, which is saying something, because he hasn’t felt any sexual dignity since he was 14 and lost his virginity in the back of a car.
“Prettiest boy I’ve ever seen,” Yuuji murmurs, more to himself than anyone else, “You have no idea what you do to me. Megumi, fuck, you should see yourself.”
Hail motherfucking Jesus and Mary, Yuuji unzips his pants and shuffles them down just enough so his cock is freed. Megumi’s put in shock for the third time this evening alone ‘cause— and he knew this, to some extent, but— Yuuji is huge.
He’s a little concerned how it’s gonna fit inside him. He hasn’t actually been fucked in awhile, and he seriously doubts that the 2 fingers that was inside of him is going to be enough prep.
So, Megumi voices his concern, “Yuuji, I— I, don’t think it’ll fit—” only to be hit with a hard, resounding:
“I’ll make it fit.” paired with an all-too-sweet kiss to the cheek and a barely audible whisper that sounds a lot like, “Just let Nii-san take care of it.”
Megumi has no choice but to believe him, even when Yuuji holds his dick down to lay against Megumi’s abdomen and fucking christ, he thinks it reaches his cervix without even trying. He squirms away a little, only to be held still by Yuuji’s iron grip.
“I’ll be slow, I promise. Just let me put it in, ‘kay Megs?”
The raven nods once, twice.
“Words, baby.”
“Yeah. Yes. It’s fine, please .” Megumi’s barely even processing what Yuuji is saying, but the feeling of a precum soaked tip teasing against his hole hits him like a freight train and suddenly he’s struggling against Yuuji’s hold, trying to fuck himself lower onto his length.
Clearly, Yuuji isn’t one for waiting either, because the second Megumi ruts against him again he slams in all however-many-inches of his cock at once. Megumi moans— well, more like shrieks— as Yuuji floods his insides. It burns a little, but the pure pleasure of Yuuji’s dick inside of him quickly overshadows the pain. He’s so much thicker than his fingers, stretches Megumi out farther than he could even dream of.
“God, you’re tight.” Yuuji groans, circles his hips around in an attempt to adjust against Megumi’s tight heat. Megumi thinks he genuinely mewls.
He starts rolling his hips faster, hitting just the very start of Megumi’s womb before thrusting out. The way Yuuji can push Megumi into a drooling, whimpering mess only from this is as embarrassing as it is attractive. “You’re just swallowing me in, Megumi. Like a little fleshlight. Nii-san’s cocksleeve, yeah?”
Megumi nods stupidly, hums out something that sounds vaguely affirmative and wraps long arms around Yuuji’s back, encasing him.
“Yuu-nii, harder,”
“Fuck.”
Yuuji flashes the largest grin he’s ever seen, baring his fangs. Megumi feels like he’s been hunted by an apex predator, and he’s just bared his neck for it to bite into.
Ever the obedient, Yuuji does what he’s told and fucks Megumi in earnest. The bed creaks with the force of Yuuji fucking a home for himself inside, like he’s trying to ruin his pussy for anyone else. A big sign on Megumi’s cunt that says, ‘Yuuji’s, piss off.’
Megumi’s noises don’t even sound like himself. Loud, high-pitched, breathy moans and whimpers when Yuuji fucks in and out. He doesn’t even register it as himself until he catches a whine in his throat, needy and desperate.
Molten lava pools down to his stomach and shit , he can’t be cumming this fast. Megumi shakes his head rapidly, tries to signal through broken moans and little mewls of, “No, not yet- Yuuji slow down,” but either Yuuji’s too focused to hear or he’s ignoring him on purpose.
He gets his answer when Yuuji leans into his ear, burrowing inside impossibly deeper, and whispers: “C’mon, ask nicely. What's my name?”
Megumi’s hit with a wave of confusion. He just said it, like literally, actually just groaned for Yuuji to stop. It genuinely perplexes him, and Yuuji getting back up and restarting his rough pace doesn’t help with his cognitive thinking skills.
He scrambles for an answer, panics when his brain wont fucking work and water begins to manifest in his tear ducts.
“I— I don’t know, Yuuji—?”
“Nuh-uh. Shame.” Yuuji doesn’t really seem all that sympathetic, because the next second he’s folding Megumi in half and jackhammering into his sopping hole.
It’s too much, far far too much, and Megumi’s legs tremble erratically and one second he’s whining for him to stop and the next— Megumi’s cumming. Squirting hot clear liquid all over the both of them, and in his blissed out euphoria it clicks what Yuuji wants to hear.
Megumi’s voice is wrecked, comes out all crackly like he’s been singing all day when he moans:
“Nii-san, fuck!”
Even when his cunt stops gushing, and his legs slowly stop shaking, Yuuji keeps bullying himself in. Like he didn’t even notice Megumi’s already cum. Selfish grinds inside the man, trying to chase his own release.
When Megumi looks up, Yuuji looks a little feral— his eyes are so blown out the hazel of his eyes are only thin rings. He’s sure he does, too. All cockdrunk, drool-slick lips with sweat making his bangs stick to his forehead.
“There you go,” Yuuji caresses his cheek, taps it gently, “Got there eventually.” He punctuates his words with rough thrusts, Megumi’s eyes rolling back as he gives into the pleasure— allowing Yuuji to use him like a little sexdoll.
Megumi grows limp in Yuuji’s hold. His eyes are glazed over, overstimulated, the only tell that he’s conscious is his stuttered moaning. It only motivates Yuuji to fuck him harder.
His pace grows sloppy, bucking wildly into Megumi’s heat and hitting the tip of his womb dead on. Fuck, Megumi can tell he’s about to cum. He wants Yuuji to finish inside of him.
“Close, Megs—”
“Inside. Yuu-nii, cum inside of me- get me pregnant, don’t you want to? Please, please.” Megumi adjusts his legs to lock onto Yuuji’s hips, keeping him trapped inside.
Yuuji grunts, “Yeah? you want that? Nii-san will fuck a baby into you, don’t worry,”
It sounds like a promise. The evil, horny part of Megumi’s brain pleads that it is.
With a couple fast-paced thrusts, Yuuji’s cumming inside, red-hot liquid shooting into Megumi’s womb all at once. It fills him up like nothing else, satiates a primal need in him Megumi didn’t know he had. They’re both loud, sighing into each other's ears as they come down from their high.
There’s only quiet for a while. The tension is so thick, you could cut the air with a knife.
Megumi oofs when Yuuji leans his whole 200-something pound self onto the raven’s front, and the tension immediately dissipates.
“Heavy fucker,” he heaves, punching Yuuji’s back to try and shove him off. Yuuji obliges, but not after a loud giggle, and rolls over to pull out and lie next to him.
“Mm,” Yuuji hums, thinking. “ ‘Get me pregnant’ , huh?”
Ugh. Megumi’s actually going to kill himself. “Shut up, you were into it too.” His face goes bright red, like a lil’ tomato. “You’re paying for my morning after, I hope you know that.”
“Of course, of course.”
There’s silence again. It’s actually peaceful, and Megumi’s about to feel comfortable enough to snuggle up to his step-brother but then—
“You’re total brocon, Megs.”
Megumi groans in frustration. “Fuck you, I’m gonna go piss.”
“ Noooo, Megumi! what happened to ‘Yuu-nii, Yuu-nii!’? ” Yuuji fakes high pitched, girly moans and Megumi just grows even more agitated. “You were so cute- say it again for me?”
Yuuji tries using his stupid huge ‘please?’ puppy-eyes. Megumi doesn’t falter.
“Go fuck off to your own room.” Megumi huffs and shuffles himself up from the crumpled bed sheets, heading for the bathroom.
He can hear Yuuji faux-sobbing out in disappointment as he leaves, and the second he sits himself down onto the toilet Megumi can’t help himself from reflecting.
He fucked Yuuji. He actually fucked Yuuji. The sex was crazy good, too. His goal is— basically— completed.
He doesn’t really wanna stop though, now he’s got his first taste. Like a kid promising his parents he’ll only have one teensy tiny slice of a cake and the next second he’s scoffing the whole of it down.
And, so what if he keeps fucking his step-brother? A. They're adults, it’s not like it matters, and B. How would their parents find out? It’s fine. It's totally, absolutely fine. There’s nothing… that wrong with their predicament.
Yuuji definitely wants to continue whatever they have going on too. Again: he’s never been especially subtle.
Before Megumi can overthink the matter any further, he hears Yuuji shout to ‘get his ass back in here, he’s cold,’ so he hurriedly flushes and scrambles to get back into bed.
Yuuji pulls him under the covers the second Megumi nears the edge of the bed, mumbling something about how he has to keep him warm and how tired he is. Megumi hums, equally sleepy. He allows Yuuji to spoon him, strong arms holding his waist and an equally muscular thigh draping itself over Megumi’s legs. It makes him feel safe, protected.
They fall asleep like that, curled up together on a far too small mattress like two matching puzzle pieces.
And if Yuuji wakes Megumi up, impossibly beautiful with the sunrise shining on him, asking if he can fuck his thighs to fix his morning wood—
Who is Megumi to say no?