"I'll fucking kill you, Avery! I'll gut you!"
A rough-edged Slytherin and Sirius Black spend their sixth year trading insults and blows in a series of heated confrontations.
Warnings: Heavy swearing, tension, bullying, fighting. Ps i do NOT support she who shall not be named at all I'm just obsessed with Harry Potter so why not write some gay shit out of spite!
The Slytherin common room was an aquarium for the elite, and Y/N was the invasive species.
It was six in the morning, the lake water pressing against the thick glass windows, casting everything in a sickly, undulating shade of emerald. Y/N sat in a high-backed velvet chair that felt like a throne of thorns. He was currently occupied with a piece of wire and his own reflection in a darkened silver tray, trying to force a new piercing into his upper cartilage without waking the rest of the dorm.
He gritted his teeth, a hiss of "Fuck," escaping through his molars as the metal pierced the skin. He didn't use a numbing charm. He liked the sting; it reminded him he was awake.
Y/N caught his reflection. He looked like hell, and he liked it that way. His hair was a chaotic nest of dark strands that refused to lay flat, and the smudge of black kohl around his eyes from the night before had bled into a bruised, smoky shadow that made him look twice as dangerous as he actually was. He was wearing a threadbare black t-shirt—definitely muggle—and a pair of heavy, steel-toed boots that had seen more fights than the average Auror.
"You're going to get an infection doing that," a voice drawled from the shadows of the stairs.
Y/N didn't flinch. He wiped a stray bead of blood from his earlobe with his thumb and looked up. Regulus Black stood there, looking like he’d been pressed and pleated by a team of house-elves.
"Piss off, Regulus," Y/N said, his voice a low, gravelly rasp that sounded like it hadn't seen water in a week. He stood up, the floorboards groaning under his boots. "Go polish your prefect badge or whatever it is you do to feel important."
"I'm just saying," Regulus leaned against the cold stone wall, his eyes tracking the silver rings that littered Y/N’s fingers. "The House is already down sixty points because you decided to 'rearrange' Avery’s face in the Great Hall. Slughorn is looking for a reason to throw you to the Giant Squid."
"Avery called my mother a mud-blood whore. I think 'rearranging' was a polite way of handling it," Y/N snapped. He grabbed his leather jacket from the floor, slinging it over one shoulder. "Tell Slughorn if he wants my head, he can come fetch it from the Forest. I've got work to do for Hagrid."
"You're a Slytherin, Y/N. Start acting like you care about the name."
Y/N paused at the stone archway, looking back at the younger Black brother with a cold, dead-eyed smirk. "I’m an unwanted Slytherin, Reg. There’s a difference. You play your part, and I’ll play mine.”
————————————————-——————————
The walk to the Great Hall was a gauntlet of whispers. Y/N didn't walk; he stalked. He was a jagged silhouette of black denim and leather against the pristine robes of the other students. He could feel the eyes of the younger years on him—fear, mostly—and the glares of the Pureblood elite who hated that someone with "filthy" half-blood habits wore their serpent crest.
He didn't head for the Slytherin table. Instead, he grabbed a green apple from a platter and leaned against one of the massive stone pillars near the entrance, his arms crossed over his chest.
He felt the shift in the room before he saw him.
The Marauders entered like they owned the damn oxygen. James Potter was laughing, messy hair and glasses catching the morning light, but it was the boy trailing slightly behind him that made Y/N’s grip tighten on his apple.
Sirius Black was the epitome of everything Y/N hated and couldn't stop looking at. He was effortless. His robes were expensive but worn with a calculated sloppiness that screamed rebellion. He was beautiful in a way that felt like an insult.
Sirius was mid-sentence when his gray eyes snapped to the pillar. He stopped dead.
The Hall didn't erupt in shouting. It was worse. It was a heavy, suffocating silence as the two of them locked eyes. Sirius’s expression shifted from arrogant amusement to something sharper—something predatory. He didn't say a word to his friends; he just stared at Y/N, his tongue poking against the inside of his cheek.
"Look at this," Sirius said, his voice low but carrying in the quiet hall. He stepped closer, leaving his friends behind. "The Dungeon Rat has come up for air. You look like shit, Y/N."
"And you look like you spent three hours in front of a mirror trying to make your hair look like you didn't," Y/N replied, his tone flat and biting. He took a slow, loud bite of the apple, never breaking eye contact. "Move along, Black. You're blocking my view of people I actually tolerate."
Sirius stepped into his personal space, the scent of expensive sandalwood and broomstick wax hitting Y/N like a physical blow. Sirius was taller by an inch, and he used it, looming over Y/N with a smirk that didn't reach his eyes.
"I heard you lost your house another forty points last night," Sirius murmured, loud enough for only the two of them to hear. "You’re making quite a name for yourself. Even my dear brother seems worried you’re going to get yourself killed before the winter frost."
"Concerned, Black? That's almost sweet," Y/N sneered, the smudged eyeliner making his gaze look even more intense. He leaned in, his nose inches from Sirius’s. "But I don't need a Gryffindor princess looking out for me. Go find a cat to save or something."
Sirius’s eyes darkened, a flash of genuine temper flickering in the gray. He reached out, his fingers hovering just inches from Y/N’s head. "You're a mess. A walking, talking disaster."
Y/N swiped Sirius’s hand away with a violent motion, the silver rings on his fingers catching the light. "Touch me again and you’ll be eating through a straw for a month. I’m not joking, Sirius."
"Neither am I," Sirius whispered, his voice dropping to a dangerous, gravelly register.
They stood there for a heartbeat too long—two storms colliding in the doorway of the Great Hall—until James Potter cleared his throat loudly.
"Come on, Padfoot. Don't waste your breath on the help."
Sirius lingered for a second, his eyes dropping to Y/N’s mouth before snapping back up. With a mocking wink that made Y/N’s blood boil, he turned and strutted toward the Gryffindor table.
—————————-—————————————————
The afternoon was spent in the cool, damp air of the Forbidden Forest. Hagrid was the only person who didn't look at Y/N like he was a ticking time bomb.
"You've got a way with the misunderstood ones, Y/N," Hagrid grunted, watching as Y/N sat on a rotted log, letting a group of Bowtruckles crawl over his scarred knuckles.
"Most kids'd be screamin' their heads off. You just... sit there."
"They don't judge, Hagrid," Y/N said, his voice softer than it had been all day. He reached into his pocket and pulled out a small piece of wood, letting the creatures gnaw on it. "They just want to survive. I can respect that."
"Dumbledore asked about ya today," Hagrid said, leaning on his massive crossbow. "Said he likes the 'kick' you give. Says Hogwarts needs a bit of grit to keep the foundations from crackin'."
"Dumbledore’s an old man with too many riddles," Y/N muttered, though a small part of him felt a flicker of something that wasn't anger. "He keeps giving me detention like it's a reward."
"Maybe he knows you've got nowhere else to go," Hagrid said gently.
Y/N didn't answer. He just looked deeper into the dark trees, his jaw tight. He had a family—a cold, crumbling house in the suburbs of London and a father who only spoke to him with his fists—but Hagrid was right. He didn't have a home.
——————————————————————————
Night had fallen, and the castle was a labyrinth of shadows and cold stone. Y/N was making his way back from the Forest, his boots caked in mud, his leather jacket damp from the mist.
He was ducking into a blind corridor near the kitchens—a shortcut he knew the prefects ignored—when he felt the air change.
He pulled a crumpled muggle cigarette from his pocket, the tobacco dry and smelling of home. He didn't have a lighter; he liked the challenge of the spark. He rubbed his thumb and middle finger together, focusing his frustration into a single point.
Snap. "Need a hand with that, sweetheart? Or is your magic as broken as your attitude?" a voice drawled. It was melodic, posh, and sounded like it was used to being obeyed.
Y/N didn't look up. He knew the boots. Dragonhide, expensive, polished. Sirius Black. "You’re going to get a broken nose if you don't keep walking, Black."
"Charming as always," Sirius stepped into the light, his tie loosened, his gray eyes tracking the fresh, purple blooming bruise along Y/N's jawline.
"Who’d you fight this time? Mulciber? Or did you finally try to take on a Whomping Willow?"
"None of your business." Y/N finally got a spark, the cherry of the cigarette glowing. He took a drag and exhaled the smoke directly into Sirius’s face. "Don't you have a fan club to go lead? Or a Marauder to annoy?"
Sirius didn't flinch. Instead, he stepped closer, his chest nearly brushing Y/N's dark, non-regulation sweater. The air between them instantly turned heavy, charged with that low-frequency hum of two people who either wanted to kill each other or tear each other's clothes off. Probably both.
"I heard Slughorn is down fifty points because you threw a cauldron at a seventh year's head," Sirius smirked, his hand reaching out—not to touch, but to tap the silver rings in Y/N’s ear. "Your housemates are calling for your head. You’re the most hated man in the dungeons."
Y/N’s hand shot up, grabbing Sirius by the collar of his white shirt and slamming him back against the opposite wall. The sound of stone meeting bone was dull and wet.
"I don't belong in the dungeons," Y/N hissed, his foul mouth inches from Sirius’s ear. "And I don't belong to a 'house.' Go play hero somewhere else before I decide I like the sound of your head hitting the floor better than your voice."
Sirius grabbed Y/N’s jaw, his thumb pressing hard against the bruise there. It wasn't a caress; it was a claim. "Stop talking. You talk too much for someone who claims they don't care."
Y/N didn't hesitate. He grabbed Sirius’s collar and slammed him back against the stone wall. The crack of Sirius’s head hitting the masonry was sickeningly satisfying.
"I told you," Y/N growled, his face inches from Sirius’s, his foul mouth practically brushing Sirius’s lips. "Don't. Fucking. Touch. Me."
Sirius didn't pull away. He let out a jagged, breathless laugh, his hands coming up to grip Y/N’s wrists, his fingers digging into the leather of his jacket. "Or what? You'll hit me? Go ahead, Y/N. Hit me. Do something honest for once in your life."
The air between them was electric, thick with the scent of rain, smoke, and pure, unadulterated tension. Y/N’s heart was hammering against his ribs like a trapped bird. He wanted to break Sirius’s nose; he wanted to tear the buttons off his shirt. He didn't know which impulse was stronger.
"You're a goddamn nightmare," Y/N whispered, his grip on Sirius’s shirt tightening until his knuckles went white.
"And you're pathetic," Sirius countered, his voice a low, rough rasp.
He lunged forward then, not to kiss him, but to headbutt him—a sharp, painful collision of foreheads that sent stars dancing in Y/N’s vision.
"Shit!" Y/N yelled, stumbling back, blood already starting to bead from a small cut on his brow.
Sirius was grinning, his own forehead red and bruised, looking like a madman. "There he is. There’s that ‘anger’ everyone talks about."
"You're fucking insane," Y/N breathed, wiping the blood with the back of his hand, a dark, dangerous grin finally mirroring Sirius’s.
"Takes one to know one, Snake."
The corridor was silent, save for the ragged, synchronized breathing of two boys who didn't know how to stop.
The headbutt had left Y/N’s vision swimming in a sea of red and gold sparks. The metallic tang of blood filled his mouth, sharp and familiar. He didn’t back down; he never did. He lunged forward, his heavy black boots skidding on the stone, and tackled Sirius around the waist.
They hit the floor hard. The sound was wet and heavy—the sound of two bodies colliding without the grace of magic. This wasn't a duel. There were no wands, no elegant flick of the wrist. This was a street fight in the hallowed halls of Hogwarts.
Y/N scrambled on top, his silver rings catching the dim torchlight as he pinned Sirius’s shoulders to the cold floor. "You want 'honest'?" Y/N hissed, a drop of blood from his forehead landing squarely on Sirius’s cheek. "You want to see what happens when I stop holding back? You’re just a bored little rich boy looking for a thrill. I’m just trying to survive the day without killing someone like you."
Sirius didn't look bothered by the weight or the threat. He looked exhilarated. His hair was fanned out against the stone, his gray eyes blown wide with adrenaline. He reached up, his fingers digging into the muscle of Y/N’s forearms, dragging him down closer.
"Then kill me, Y/N," Sirius whispered, his voice a jagged edge of a rasp. "Do it. Show me you’ve got the balls to actually finish something."
Y/N’s hand moved—not to punch, but to grip Sirius’s throat, his thumb pressing into the dip beneath his jaw. The friction was unbearable. The space between them was gone. It was a moment of pure, violent clarity where the line between a killing blow and a kiss didn't just blur; it vanished.
The voice didn't roar, but it resonated through the very stones of the castle.
A sudden, invisible force slammed into Y/N’s chest, lifting him off Sirius and throwing him backward. He hit the wall with a grunt, his black boots sliding as he struggled to find his footing.
Albus Dumbledore stood at the end of the corridor. He didn't look angry—which was worse. He looked disappointed, his half-moon spectacles glinting in the dark. Beside him, Professor McGonagall looked as though she’d just sucked on a particularly sour lemon.
"Mr. Black, Mr. L/N," Dumbledore said softly. "I believe the hour is far too late for such... vigorous extracurriculars."
Sirius scrambled to his feet, wiping blood from his lip with the back of his hand. He looked like a guilty schoolboy for a split second before the arrogance settled back into his shoulders like a well-worn cloak. "He started it, Professor. I was just—"
"I don't care who started it," McGonagall snapped, her eyes darting between Y/N’s smudged eyeliner and Sirius’s torn collar. "Look at the state of you both. You look like muggle brawlers."
"Mr. L/N," Dumbledore said, his gaze fixed on Y/N, who was leaning against the wall, trying to stop the world from spinning. "Given your... precarious history this term, I'm afraid the blame for this escalation must fall on your shoulders. Fifty points from Slytherin. And a week of detention."
Y/N let out a sharp, bitter laugh, the sound echoing off the ceiling. "Of course. The Black heir was just an innocent bystander, right? Always is."
Sirius didn't defend him. He didn't even look at him. He just smirked at the wall, the satisfaction of Y/N getting the brunt of the punishment clear on his face. "Unlucky, Y/L/N. Better luck next time."
"Get out of my sight, Black," Y/N growled.
—————————————-—————————————
The next morning in the Slytherin common room was worse than a funeral. The emerald light felt colder, and the air was thick with the kind of silence that usually preceded a curse to the back.
Y/N sat at a small table, trying to ignore the throbbing in his head. He was wearing his usual dark jumper, his boots kicked out in front of him. He was nursing a fresh, purple bruise on his cheekbone and a cut over his eye that kept stinging.
"Fifty points," a cold voice echoed.
Y/N didn't look up. Mulciber and Avery were standing over him, their expensive robes pristine, their faces twisted in disgust.
"You’re a parasite, Y/N," Mulciber hissed, leaning in close. "You don't belong in this house. You're a half-blood mistake that the Hat threw in here because it felt sorry for you.
“And now we’re dead last for the Cup because you can't keep your filthy hands off the Gryffindors."
"If you're so worried about the points, Mulciber, why don't you go earn some?" Y/N replied, his voice a low, dangerous rasp. He finally looked up, his smudged eyeliner making his gaze look skeletal. "Or are you too busy kissing Malfoy’s ass to do anything useful?”
Avery reached out to grab Y/N’s collar, but Y/N was faster. He stood up, his chair screeching back, and stepped into Avery’s space. He was a head shorter, but he looked like he was made of barbed wire and gunpowder.
"Touch me," Y/N challenged, his foul mouth twitching into a sneer. "Give me an excuse to show you what I did to Black's face last night. I'm already in detention. What's one more?"
The two purebloods hesitated. They were bullies, but they weren't fighters—not like Y/N. They backed off, but the look in Mulciber’s eyes said this wasn't over.
"You're a dead man walking, L/N," Mulciber muttered as they walked away. "Enjoy the dungeons while you can. Nobody’s watching your back here."
Y/N sat back down, his hands shaking slightly from the adrenaline. He felt a presence beside him. Regulus Black sat down, leaning his head back against the stone.
"My brother is a prick," Regulus said simply, not looking at him.
"He’s also obsessed," Regulus added, glancing at the bruise on Y/N’s face. "He’s been talking about that fight all morning. He thinks he won."
"He didn't win shit. He just got lucky Dumbledore showed up before I broke his jaw."
————————————————————-——————
Y/N entered the Great Hall for lunch like he was walking onto a battlefield. He kept his head down, his boots heavy on the stone. He didn't sit at the Slytherin table; he headed for the far end of the hall to grab a piece of bread and leave.
As Y/N passed the Gryffindor table, Sirius stuck his foot out. It was a childish move, but effective. Y/N stumbled, nearly hitting the floor, before catching himself on the edge of the table.
The Gryffindors erupted in laughter. James Potter was howling, and even some of the Hufflepuffs were snickering.
Y/N straightened up, his face burning with a heat that wasn't just embarrassment—it was pure, unadulterated rage. He looked at Sirius, who was leaning back on his bench, looking smugger than a cat in a creamery.
"Watch your step, Snake," Sirius drawled, his gray eyes dancing with malice. "Wouldn't want you to trip and lose another fifty points. Or is your head still spinning from last night?"
Y/N didn't say a word. He walked over to the pitcher of iced pumpkin juice on the Gryffindor table, picked it up, and dumped the entire thing over Sirius’s head.
The Hall went dead silent.
The juice soaked through Sirius’s perfectly styled hair, dripping down his face and onto his white shirt. He looked shocked, his mouth hanging open as the orange liquid ruined his "Prince of Gryffindor" image.
"You... you little shit," Sirius breathed, standing up, his chair clattering to the floor.
"You look better in orange, Black," Y/N said, his voice cold and steady. "Matches your ego."
Sirius lunged across the table, grabbing Y/N by the front of his jumper. "You want to go again? Right here? In front of everyone?"
"Do it," Y/N challenged, his hand coming up to grip Sirius’s wrist, his silver rings digging into the skin. "Give them a show. I don't give a fuck about the points, and I don't give a fuck about you."
They were inches apart, the smell of pumpkin juice and raw temper thick between them. Sirius looked like he was about to swing, his eyes darting to Y/N's mouth and then back to his eyes, his breathing heavy.
"Mr. Black! Mr. L/N!" McGonagall’s voice shrieked from the high table. "Separated! NOW!"
Sirius let go, but not before leaning in and whispering into Y/N’s ear, his voice a jagged promise. "This isn't over. Not by a long shot."
"I'm counting on it," Y/N spat back.
——————————————————————————
The Forbidden Forest didn’t care about House points. It didn’t care about the smudged kohl beneath Y/N’s eyes or the fact that his pulse hammered a frantic rhythm against his throat every time he saw a flash of Gryffindor red. The Forest only cared about blood and breath.
Y/N sat on the damp earth, his heavy black boots caked in mud that would surely earn him another lecture from Filch. He was currently holding a young, trembling Mooncalf. The creature was spindly and awkward, its enormous eyes reflecting the silver crescent of the moon hanging above the canopy. It had a jagged tear in its hind leg—likely a run-in with a stray blast from a confused fourth-year’s wand near the treeline.
"Steady," Y/N murmured, his voice losing the jagged, foul-mouthed edge it held in the castle. "I’m not going to hurt you, you little shit. Just stay still."
He didn't use a wand. He’d learned a long time ago that magical creatures reacted better to the hands than the wood. He applied a thick, pungent paste of dittany and crushed silverweed—something he’d swiped from Slughorn’s stores weeks ago—and wrapped the wound in a strip of cloth torn from his own shirt.
"He's lookin' better already," Hagrid’s voice boomed from the shadows, though the giant moved with surprising softness as he approached. He handed Y/N a tin mug of something that smelled like fermented tea and old socks. "You've got the touch, Y/N. Most kids come out here lookin' for adventure. You come out here lookin' for a place to hide."
Y/N took a swig of the tea, grimacing. "Hard to hide when everyone in that castle is breathing down your neck, Hagrid. Between the Slytherins wanting my head and Black acting like he’s the king of the world, I’m about five minutes away from moving into the cave with the spiders."
"Sirius is a loud one," Hagrid chuckled, settling onto a massive stump. "But he’s got a heavy heart, that lad. Same as you, I reckon. Both of you kickin' at the world 'cause you’re afraid it’s gonna kick you first."
"Don't compare me to him," Y/N snapped, the heat returning to his eyes. "He’s got friends. He’s got Potter and Lupin and the whole world telling him he’s a hero. I’ve got a common room full of people who’d poison my breakfast if they thought they could get away with it."
Y/N stood up, brushing the dirt from his dark trousers. He checked his reflection in a pool of rainwater—his hair was a mess, his brow was still bruised, and he looked every bit the unwanted pariah he was. "I have to get back.
Filch has me scrubbing trophies tonight because Dumbledore thinks manual labor builds character."
"Stay safe, lad," Hagrid called out. "And keep your chin up. A kick is only good if you’re aimin' it at the right target."
——————-—————————————-——————
The walk back to the castle was a transition from peace to a slow-boil tension. As the stone floors replaced the soft moss, Y/N felt his shoulders hunch, his jaw tightening into that familiar, defensive mask.
He was cutting through the lower dungeons, a shortcut that bypassed the main staircase, when the air shifted. It was too quiet. The torches in this wing were flickering low, casting long, skeletal shadows against the damp walls.
"Back from the dirt, are we?"
Y/N stopped. His boots gave a single, final clack against the stone.
Mulciber was leaning against a suit of armor ten paces ahead. Beside him stood Avery and two other seventh-year Slytherins whose names Y/N couldn't be bothered to remember. They weren't wearing their robes; they were in their silk shirts and tailored trousers, looking like the pampered purebloods they were.
"Move, Mulciber," Y/N said, his voice dropping to that dangerous, gravelly register. "I’m not in the mood for your 'noble' bullshit today."
"You've cost us a hundred points in two days, L/N," Avery said, stepping forward. He was twirling his wand between his fingers—a nervous, arrogant habit. "The House has decided you need a reminder of where you stand. You're not one of us. You're a stain."
"Then wash me out," Y/N challenged, his hand diving into his pocket for his own wand, but he was too slow.
" Expelliarmus! " Mulciber barked.
Y/N’s wand flew from his grip, clattering across the floor and sliding into the shadows. He didn't panic. He just lowered his center of gravity, his fists curling, the silver rings on his knuckles glinting. "Cowards. Can't even do it with your hands?"
"Why would we touch you?" Mulciber sneered.
Y/N felt the invisible hook snag his ankle. He was jerked off the floor, dangling upside down in the air. The blood rushed to his head, his dark jumper falling over his face, exposing the jagged scars along his ribs from a childhood he spent trying to forget.
"Let me down!" Y/N roared, swinging his arms, trying to grab onto anything.
The Slytherins laughed—a cold, hollow sound that echoed in the corridor.
"Maybe we should leave you here for the night," Avery suggested, poking Y/N in the chest with his wand. "Let the 'Prince of Gryffindor' see what happens to his favorite punching bag."
"I'll fucking kill you, Avery! I'll gut you!" Y/N thrashed, his foul mouth unleashing a string of curses that would have made a sailor blush.
From the shadows at the far end of the hall, a figure stepped out.
He was leaning against a pillar, his arms crossed over his chest. He wasn't rushing to help. He wasn't pulling out his wand. He was just... watching. He had a look of bored detachment on his face, though his eyes were narrowed, tracking every movement Y/N made.
"Look at this," Sirius drawled, his voice echoing. "The big, bad Snake, caught in a trap. I thought you were supposed to be 'rough,' L/N. You look like a bat at a circus."
"Black!" Mulciber turned, his eyes narrowing. "This is Slytherin business. Piss off back to your tower."
"Oh, I’m leaving," Sirius said, pushing off the pillar. He walked closer, his eyes locked on Y/N’s face—red, angry, and helpless. Sirius reached out and flicked Y/N’s dangling ear piercing, a mocking smile playing on his lips. "I just wanted to see if the 'kick' Dumbledore likes so much worked upside down. Turns out, it doesn't."
"Go to hell, Sirius!" Y/N spat, a drop of sweat landing on Sirius’s shoe.
Sirius looked down at his boot, then back at Y/N. His expression shifted—just for a second—into something sharp and unreadable. He didn't help. He didn't curse Mulciber. He just turned on his heel and started walking away.
"Have fun, boys," Sirius called back over his shoulder. "Try not to break him too much. I still want my turn."
Y/N felt a coldness in his chest that had nothing to do with the drafty corridor. As the Slytherins turned back to him, their wands raised for the next curse, Y/N stopped thrashing. He just stared at the spot where Sirius had been, his teeth gritted so hard he thought they might shatter.
He didn't want a hero. He didn't want a savior. But the fact that Sirius had watched him be humiliated and walked away... that was a different kind of pain. A different kind of fuel.
The blood rushing to Y/N’s head was a thrumming roar, a rhythmic thump-thump-thump that drowned out the mocking laughter of the purebloods. He was dangling like a piece of meat, but he wasn’t dead yet. All he could think about was Sirius disappearing around the corner, the bastard’s casual stride a final insult to the situation.
"He’s right," Mulciber laughed, stepping closer until he was within arm's reach of Y/N’s hanging torso. "You’re not a fighter. You’re just a freak with a loud mouth. Maybe if we cut those pretty little rings out of your ears, you’ll start listening to your betters."
Mulciber reached out, his hand closing around the silver rings in Y/N’s earlobe, intending to yank.
That was his first mistake. He’d forgotten that Y/N didn't need a wand to be dangerous.
Y/N didn't swing his arms; he crunched his entire body upward, a feat of raw core strength fueled by pure, unadulterated spite. He grabbed Mulciber’s throat with one hand and the front of his expensive silk shirt with the other.
"My turn, you posh prick," Y/N hissed.
With a violent heave, Y/N used Mulciber’s own weight as a counter-lever. The Levicorpus spell was designed to hold a body in place, but it wasn't designed to withstand two bodies colliding in mid-air. The spell snapped with the sound of a dry branch breaking.
Y/N plummeted, landing on his feet with a heavy thud of his black boots, but he didn't stop. He used the momentum to drive his shoulder into Mulciber’s chest, pinning him against the same suit of armor Sirius had just been leaning on.
Y/N’s fist collided with Mulciber’s jaw—a short, brutal hook that sent a spray of red across the silver plating of the armor. Y/N didn’t wait for him to fall. He grabbed Mulciber by the hair and slammed his face into the visor of the helmet.
"Who’s the freak now?" Y/N roared.
Avery lunged forward, his wand raised, but Y/N was a whirlwind of jagged edges. He ducked a stray Stupefy and stepped inside Avery’s reach, delivering a punishing blow to the taller boy’s solar plexus. As Avery doubled over, gasping for air, Y/N connected a heavy boot with the boy’s shin, the steel toe meeting bone with a sickening crunch.
The other two Slytherins hesitated, their wands trembling. They weren't used to this. They were used to elegant duels and pointed insults—not a boy with smudged eyeliner and blood on his knuckles who fought like a cornered wolf.
"Anyone else?" Y/N spat, wiping a smear of Mulciber’s blood from his cheek. "Or are you all going to run back to your daddies and cry about the mean half-blood?"
They didn't answer. They scrambled to pick up Mulciber, who was groaning on the floor, his jaw already swelling to the size of a grapefruit. They retreated into the darkness of the dungeons, leaving Y/N alone in the flickering torchlight.
Around the stone corner, hidden in the deep recess of a statue of a weeping gargoyle, Sirius Black was pressed against the wall.
He wasn't walking away. He hadn't left.
His heart was hammering against his ribs in a way that had nothing to do with the fight he’d just witnessed. He’d heard it all—the snap of the spell, the wet thud of fists, the raw, guttural growl of Y/N’s voice. He’d intended to keep walking, to let the Slytherins "teach a lesson" to the boy who had dumped juice on his head, but his feet wouldn't move.
Sirius closed his eyes, his breathing shallow. He could still see the image of Y/N hanging upside down—the way his jumper had slipped to reveal the pale, scarred skin of his ribs. Those weren't Quidditch injuries. Those were the kind of marks Sirius saw in his own mirror after a summer at Grimmauld Place.
He felt a sick twist of something in his gut. It wasn't guilt—he told himself it wasn't guilt—but it was a recognition. A dark, tethering bond.
He heard the heavy, rhythmic click-clack of Y/N’s boots approaching.
Sirius didn't want to be caught watching. He didn't want Y/N to know he’d stayed. He waited until the footsteps were close, then slipped into the shadows of a secret passageway behind the tapestry, disappearing just as Y/N rounded the corner.
Sirius pressed his back against the rough stone of the hidden passage, the heavy velvet of the tapestry settling back into place with a dull thud. He held his breath, listening to the rhythmic click-clack of Y/N’s boots as they passed his hiding spot.
He expected the footsteps to continue toward the Trophy Room. He expected the silence of the dungeons to return.
Instead, the footsteps stopped.
There was a heartbeat of absolute, suffocating stillness. Then, a sound erupted that made Sirius jump so hard he nearly cracked his skull against the low ceiling of the passageway.
It wasn't a spell. It was the sound of a physical impact so violent it felt like the foundations of the castle had shifted. A deep, tectonic shudder vibrated through the stone, traveling up through the soles of Sirius’s boots and rattling his very teeth.
Sirius’s hand flew to his wand, his mind racing. Did a wall collapse? Did Mulciber come back with a blasting curse?
He couldn't help himself. He pushed the edge of the tapestry aside just an inch, peering through the gap.
Y/N was standing three feet away, his back to Sirius. His right fist was buried inches deep into the solid granite wall of the corridor. A spiderweb of cracks radiated out from his knuckles, and the stone was scorched black at the center, as if the punch had been delivered with the heat of a furnace. The torches in the hallway had been blown out by the sheer force of the magical backlash, leaving only the dim, grey moonlight to illuminate the scene.
Y/N didn't move. He didn't hiss in pain. He just leaned his forehead against the cold stone, his shoulders shaking with the effort of holding back a roar.
Sirius watched, paralyzed, as Y/N finally pulled his hand back. Even in the shadows, the damage was sickening. The skin was shredded, blood coating the silver rings on his fingers and dripping onto the floor in heavy, dark spots. His hand was mangled—knuckles clearly shattered, fingers hanging at angles that made Sirius’s own stomach turn.
But Y/N didn't even look at it. He didn't reach for a bandage or mutter a healing charm. He just wiped the blood onto the thigh of his dark trousers, leaving a jagged, red smear against the fabric.
"Fuck," Y/N whispered, his voice a broken, hollow rasp that sounded nothing like the boy who had been shouting insults an hour ago.
He turned and began to walk away, his boots resuming that steady, terrifyingly calm rhythm.
Sirius let the tapestry fall back into place, his heart thumping a frantic, uneven beat against his ribs. He stayed in the dark for a long time, the image of that scorched, shattered stone burned into his mind. He’d seen plenty of magic, but he’d never seen anything like that—raw, accidental power fueled by a rage so deep it made his own rebellion look like child's play.
He looked down at his own hands, clean and unscarred.
"You're going to kill yourself, you idiot," Sirius breathed into the dark.
He didn't know if he was angry or terrified. But as he navigated the secret tunnels back to Gryffindor Tower, the vibration of that punch still seemed to echo in his bones. He realized then that Y/N wasn't just a "Slytherin Rat" he could poke and prod for a reaction. He was a landslide waiting to happen—and Sirius was standing right in the path of the debris.
——————-—————————————-——————
Two hours later, Y/N stood in the Trophy Room. His knuckles were swollen and wrapped in messy, blood-stained athletic tape he’d found in his trunk. He looked like he’d been through a war, and he felt like it, too.
Professor Slughorn sat at a small desk near the door, humming a jaunty tune as he graded essays, his round belly straining against his waistcoat.
"No magic, boys," Slughorn chirped, not looking up. "Manual labor is a wonderful way to reflect on the importance of House harmony. Mr. L/N, you take the south wall—the Quidditch plaques. Mr. Black, the north wall—the Awards for Merit."
Y/N didn't answer. He just grabbed a tin of polish and a rag, his boots clicking a heavy, isolated rhythm as he walked to his corner. His knuckles were throbbing under the athletic tape, and his head felt like it had been put through a wringer.
Sirius was already at his station, his back to Y/N. He was working with a calculated, lazy grace, his movements mocking the very idea of punishment.
The silence lasted for twenty minutes, broken only by the scritch-scratch of rags against metal. It was a pressurized silence, the kind that preceded a boiler explosion.
"You missed a spot," Sirius said suddenly. His voice was low, smooth, and cut through the quiet like a blade.
Y/N didn't stop scrubbing. "Shut your mouth, Black."
"I’m just saying," Sirius turned around, leaning his hip against a glass case. He looked entirely too comfortable. "The '1954 Seeker of the Year' looks a bit dull. Much like your footwork in the dungeons earlier."
Y/N’s hand tightened around the rag. He turned slowly, his smudged eyeliner making his eyes look like two dark pits in his pale face. "You’ve got a lot of nerve talking about my footwork when you spent the whole fight hiding behind a pillar like a coward."
"I wasn't hiding," Sirius countered, his eyes flashing. He stepped out into the center of the room, away from his wall. "I was observing. Watching you roll around on the floor with Mulciber like a common dog."
"Better a dog than a spectator," Y/N hissed. He dropped his rag and stepped toward Sirius, the steel toes of his boots loud on the marble. "You watched them hang me up. You enjoyed it. You probably hoped they’d finish the job so you wouldn't have to look at me anymore."
"Is that what you think?" Sirius challenged, his voice dropping to a dangerous, gravelly register. He closed the gap between them until they were standing in the middle of the room, two jagged silhouettes under the moonlight filtering through the high windows. "You think I want you gone?"
"I think you don't know what you want," Y/N snapped. He was inches from Sirius now, the scent of smoke and rain from the Forest still clinging to his jumper. "You spend all day poking at me, trying to get a rise out of me, and then the second things get real, you walk away."
"Maybe I just wanted to see if you could handle yourself," Sirius whispered, his gaze dropping to the tape on Y/N’s knuckles. "And you did. You fought like a maniac. It was... impressive."
The word hung in the air, heavy and wrong.
Y/N felt a surge of something—not heat, but a cold, sharp anger. "I'm not your entertainment, Black. I'm not a show for you to watch from the sidelines. You want to see what I can do? Don't wait for a crowd next time."
"Boys!" Slughorn’s voice barked from the desk. "Less talking, more polishing! Or I shall be forced to extend this session into the weekend!"
Y/N didn't move. He kept his eyes locked on Sirius’s, his jaw set. He saw the way Sirius’s throat jumped as he swallowed, the way his gray eyes darted to the cut on Y/N’s brow.
There was a pull there—a violent, magnetic tension that made Y/N want to either punch him or grab him by the collar and never let go.
"Fine," Sirius muttered, breaking the gaze first and turning back to his wall. "Enjoy your plaques, Snake."
Y/N went back to his side, but he couldn't focus. He could feel Sirius’s presence behind him like a physical weight. He reached for a heavy silver shield, but his bruised hand slipped, and the metal clattered loudly against the floor.
"Mr. L/N!" Slughorn sighed, exasperated. "Do be careful!"
Y/n picked it up with a huff.
After some time, "Ten more minutes, boys," Slughorn announced, checking his pocket watch.
The clock in the hallway began to chime midnight.
"That's enough for tonight," Slughorn said, standing up and stretching. "Back to your dormitories. Directly! If I catch either of you in the kitchens, it's another fifty points."
They walked out of the room together, but once they reached the first junction, Sirius stopped. He didn't say goodnight. He didn't make a joke. He just stood there in the shadows of the corridor, his hands in his pockets.
"Y/N," he said, his voice barely a whisper.
Y/N paused, his hand on the strap of his bag. "What?"
Sirius looked like he wanted to say a thousand things—or maybe just one. But he just shook his head, a ghost of a smirk returning to his face. "Your eyeliner is smudged. You look like a raccoon."
"Fuck you, Black," Y/N snapped, turning on his heel and heading for the dungeons.
—————————-—————————————————
Sirius Black was not a quiet person by nature, but tonight he was a goddamn riot.
He was sprawled in his favorite armchair by the Gryffindor fire, one leg hooked over the armrest, his dragonhide boot twitching rhythmically. In his hand, he was tossing a heavy brass snitch—not catching it, just letting it slam into his palm with a rhythmic thud, thud, thud that was starting to grate on everyone’s nerves.
"He’s a fucking menace," Sirius snapped, the words jumping out of him like they’d been under pressure.
James, who was halfway through a Transfiguration essay, looked up and pushed his glasses up the bridge of his nose. "We’re still on this, Padfoot? It’s been four days. The juice is gone. Your hair is fine. Mostly."
"It’s not the juice, Prongs," Sirius growled, sitting up abruptly. The snitch hissed as it fluttered in his grip. "It’s the attitude. The way he walks around like he’s the only person in this castle who’s ever had a hard day. Have you seen those boots? He looks like he’s ready to kick a hole through the castle walls just for the fun of it."
"He is a bit intense," Peter piped up from the rug, where he was sorting through a pile of Bertie Bott’s beans. He shivered slightly. "I passed him in the corridor near the library yesterday. He didn't even say anything, just looked at me with that smudged-out stare, and I felt like I was about to be cursed into next week. He’s terrifying."
"He’s not terrifying, Pete, he’s a disaster," Sirius corrected, though his voice was a little too loud. "He’s a walking, talking violation of the school dress code. Smudged eyeliner, rings on every finger—I bet half of them are cursed—and a mouth that would make a gargoyle blush. He called Slughorn an 'old windbag' right to his face in detention."
Remus, who had been quietly reading a book on the sofa, didn't even look up. "And yet, you’ve spent the last forty-five minutes describing him in excruciating detail, Sirius. I know more about Y/N’s jewelry collection than I do about the Goblin Rebellions at this point."
Sirius felt a prickle of heat crawl up his neck. "I’m an observer of my enemies, Moony. It’s tactical."
"Right. Tactical," Remus murmured, finally turning a page. "Tactical interest in his 'jagged, gravelly voice' and how he 'looks like he hasn't slept in a week.' Very strategic."
Sirius opened his mouth to deliver a biting retort, but he was interrupted by the portrait hole swinging open. Lily Evans walked in, looking frustrated, holding a stack of parchment.
"You lot won't believe this," she said, dropping the parchment onto the table.
"If it’s about the Dungbombs in the trophy room, we have alibis," James said instantly, flashing a grin.
"It’s not," Lily sighed, rubbing her temples. "It’s the House Cup. Slytherin just jumped forty points."
The room went quiet. Sirius felt a weird jolt in his chest. "How? Mulciber hasn't done a lick of work all year."
"It wasn't Mulciber," Lily said, looking genuinely confused. "Apparently, Professor Sprout found Y/N in the greenhouses at three in the morning. He’d stayed up all night stabilizing a batch of Venomous Tentacula that had caught some kind of blight. She said she’s never seen a student handle them with such... 'care.' She gave him forty points on the spot."
James let out a low whistle. "The Dungeon Rat is a gardener? That’s a new one."
Sirius didn't laugh. He felt a strange, cold sinking feeling. He pictured Y/N—the same boy who had slammed him against a stone wall and threatened to break his jaw—quietly tending to poisonous plants in the dead of night. It didn't fit the image Sirius wanted to have of him. It made him feel like he was missing a piece of a puzzle he hadn't even realized he was solving.
"Probably just did it to get out of more detentions," Sirius spat, though the venom felt forced even to his own ears. "He’s probably trying to suck up to Dumbledore now that his own house wants his head on a spike."
"Actually," Lily added, "Sprout said he tried to refuse the points. Told her to 'shove them' because he didn't want the Slytherins thinking he cared about the Cup. She gave them to him anyway."
Remus looked over at Sirius, a small, knowing smirk tugging at his lips. "Sounds like your 'menace' is a bit of a hero in disguise, Padfoot."
"He’s not a hero," Sirius snapped, standing up so fast the snitch flew out of his hand and zipped toward the ceiling. "He’s a prick. A foul-mouthed, boot-wearing, half-blood prick who thinks he’s too good for the rest of us."
"Where are you going?" James asked as Sirius headed for the portrait hole.
"Out," Sirius grunted. "I need some air. This room smells like lavender and optimism. It’s making me sick."
———————-—————————————-—————
Sirius didn't go for "air." He went to the one place he knew he’d find trouble.
He moved through the castle with the silence of a Marauder, his mind replaying the image of Y/N in the dungeons—upside down, thrashed, but still snarling like a wolf. He remembered the scars on Y/N’s ribs. He remembered the way Y/N’s breath had felt against his skin in the trophy room.
He found himself near the Great Hall, leaning into a dark alcove as the Slytherins began to filter out from dinner. He saw them before they saw him.
Mulciber was at the front, his jaw still looking slightly lopsided and bruised. He was surrounded by his usual goons, but they were all looking over their shoulders.
He was walking ten paces behind the rest of them, completely alone. He looked like a shadow carved out of the hallway. He was wearing his black boots—the heavy ones with the scuffed toes—and his leather jacket was zipped up to his chin. He had his hands shoved deep in his pockets, his head down, looking like he wanted to fight the very air he was breathing.
As he passed Mulciber, the bigger boy muttered something under his breath—something that sounded like "Half-blood filth."
Y/N didn't even stop. He didn't pull his wand. He just stepped sideways, shoulder-checking Mulciber so hard the boy stumbled into a stone pillar.
"Say it louder next time, Mulciber," Y/N’s voice rasped through the corridor, cold as ice. "I like to hear the sound of a coward’s voice before I shut it off."
Mulciber looked like he wanted to retaliate, but his eyes darted to the bruises on his own face, and he thought better of it. He and his cronies hurried away, leaving Y/N standing alone in the center of the hall.
Sirius watched from the shadows, his pulse accelerating. He saw Y/N lean his head back against the cold stone wall and close his eyes for a single, fleeting second. He looked exhausted. He looked like he was carrying the weight of the entire castle on those narrow, leather-clad shoulders.
Sirius reached for his wand, his fingers twitching. He wanted to jump out. He wanted to mock him about the forty points. He wanted to see that spark of rage in Y/N’s eyes again because it was the only thing that felt honest in this whole damn school.
He watched Y/N pull a cigarette from his pocket, look at it, and then crumble it in his fist with a curse. Y/N turned and headed outside toward the Forbidden Forest, his boots clicking a slow, lonely rhythm against the floor.
"You're going to get caught, Snake," Sirius whispered to the empty air, his voice a mix of a threat and a promise.
He waited until Y/N was gone before stepping out of the shadows. He looked at the spot where Y/N had been standing, his mind a mess of contradictions. He hated him. He really did.
But as Sirius headed back to Gryffindor Tower, he realized he wasn't thinking about James, or Remus, or the prank they were planning for Friday.
He was thinking about the way Y/N’s rings had caught the light. He was thinking about the forty points.
And he was thinking about the fact that tomorrow, they had Potions together. And Slughorn always paired the "troublemakers" in the back.
fam i absolutely love the sev x m reader i have going on but i promised a sirius x male reader awhile ago so it’s been sitting in my drafts unfinished now it’s finally finished and i hope you guys like it so far i might do a part two or something cause i kinda left off on a cliffhanger i knew i was gonna make this one a lil more angsty enemies to loversesque so hopefully thats how it came across lmk if you guys fw it or not ok later mofos