Work Text:
Sukuna genuinely doesn’t remember the brat ever mentioned that he’d come to her gym this Saturday morning. It’s not like she pays him any attention by the way. None of her business.
But she also doesn’t recall that she agrees. However, news flash, Yuuji is bringing a friend over and he wants Sukuna to show them around the gym. This particular friend seems to be somewhat special, because the brat won’t stop talking about them. He is being very insistent and more obnoxious than usual.
“Yeah, yeah, I heard you.” She cleans her ear with a pinky, not the most hygienic but Sukuna gives zero fuck. “Calm your tits, brat. I never skip Saturday morning.”
Yuuji’s voice is blaring from the phone. It’s so loud she has to distance it from her ears.
“That’s not what I’m talking about! For god’s sake, Sukuna, do you ever listen? I want you to behave, and please act nice. This is Megumi’s first time at the gym. So, I need you to treat her with kindness. And patience. You’re missing the biggest point here!”
Sukuna sneers, “Shut the fuck up. Beggars can’t choose. If you want nice, hire a personal trainer, dumbass. I’m doing you and your friend a favor here.”
“Girlfriend, Sukuna. Mind you, I won’t ask if anyone’s available. Unfortunately, her teacher can’t make it this week–”
“Yeah, whatever.” She hangs up before Yuuji can say more. “Fucking brat.”
The asshole is lucky enough that Saturday morning is Sukuna’s favorite, and she doesn’t have a choice but to entertain his stupid idea.
Her fingers fumbles with the car key, while the other is preoccupied with a bottle of protein shake. Sukuna grabs her gym bag, checks her reflection the last time, and off to the gym.
“Really, what’s wrong with her? She’s always so gruff.”
Yuuji stares at his phone in disbelieve. He starts to look dejected, “Maybe this isn’t a good idea after all, babe. I shouldn’t have asked Sukuna of all people.”
“Hey.” Megumi reaches for her boyfriend’s face. “It’s okay, Yuuji. You’re just trying to help me, and I can’t thank you enough.”
The boy lights up, a small smile started to form on his lips. “Yeah. We’ll prove to Gojo-sensei that we can do it.”
Megumi chuckles, “That’s the spirit.”
She’d be lying if she says that she’s not nervous. Yuuji rarely talks about his older sister. Aside from the fact that they have different last name (because Sukuna took her late mother’s), and that Yuuji doesn’t get along with his sister (he even drops the nee-san title); Megumi doesn’t know much about Sukuna.
She is curious though. What kind of person would have difficulty getting along with Yuuji? Her boyfriend’s a ball of sunshine, a kind golden retriever with too much energy; he would basically put anyone before himself. Megumi can’t see a reason why someone hates him.
She has zero expectation, but hopefully Sukuna isn’t as menacing as she originally thought.
The girl gasps when a pink-haired woman enters the gym. Megumi figures that she’s probably Sukuna. It’s fairly easy to spot her; not many people are coming, and none of them has pink hair beside her boyfriend.
Sukuna’s hair has the exact same shade as Yuuji, albeit hers is longer and tied in a bun.
She’s turning to their way.
The black-haired girl feels her hands are getting clammy, giddy with anticipation.
“There you are, brat.”
Sukuna’s voice is so low and rough, it slightly gives Megumi goosebumps.
Now, seeing her up close, her face resemblance to Yuuji is uncanny. Megumi swears that they can pass as identical twins. The only thing that sets them apart are Sukuna’s face tattoos, which are also apparent on both of her buff arms.
She is tall. It’s crazy that she surpasses her brother’s height by a couple inches, because Yuuji is tall enough. Megumi’s dwarfed between them even though her height is a little above average. They both are greatly built too; broad shoulders, thick muscles, and overall strong-looking body.
Megumi suddenly feels so out of place.
The feeling washes away when Yuuji attentively hugs her waist, knocking her out of the train of thoughts. His hand feels warm and safe around her.
“Megumi, this is Sukuna. Sukuna, this is Fushiguro Megumi, my girlfriend.”
Sukuna’s blood-red eyes scans her from top to the bottom, twice. She gets a bit self-conscious as each second passes by.
“So, you’re the girlfriend.” She drawls.
Megumi nods her head and bows, “Nice to meet you, Ryomen-san.”
The woman scowls and Megumi immediately regrets her decision, “Cut the crap, call me Sukuna.”
Yuuji interjects, “Hey! What did I say about being nice?”
His sister rolls her eyes, “I haven’t done anything yet, brat. Don’t get your knickers in twist.” She saunters over the locker and stores her belongings.
Yuuji’s sister is… something else.
To be said, Megumi turns out to be very different than the image Sukuna had in mind. She vaguely remembers the punk liking tall Western chicks with big butts.
His girlfriend quite hit the tall part, although frankly no butts. So far, all Sukuna sees is straight lines; even so, the baggy t-shirt may leave a lot of room for surprises.
The girlfriend is more traditional Japanese looking than Jennifer Lawrence-ish, face-wise. She has pale skin, sharp eyes with long dark lashes, and downturned pouty little mouth. Everything Sukuna likes.
She admits that Megumi is breathtakingly beautiful. It’s no wonder her brother gets so fucking whipped. She would too. Then again, a black-haired girl with lovely eyes has always been Sukuna’s type.
How the hell a girl as ethereal as Megumi ends up with her shitty brother, Sukuna doesn’t want to know.
“So, why are you here?”
Sukuna folds her arm in front of her chest. Her biceps flex and it’s solid intentional. She easily catches Megumi shifting between her feet, long fingers fidget with the hem of her black t-shirt.
“I want to start gaining muscles.” The girl says.
She scoffs, “Sure, missy. Do you consistently workout?”
“I told you it’s her first time, Sukuna.” The nosy brat just has to butt in every time, it’s getting even more annoying now.
She clicks her tongue, “Piss off. I’m asking your fucking girlfriend, not you.”
“Sukuna, mind your language!”
“Fine. If you can’t stand swearwords, just leave brat.”
Communication with this asshole has never been smooth. The more they talk to each other, the more Sukuna feels anger bubbling on her chest. Her patience wears out quick when she’s dealing with Yuuji. The bastard tends to get her composure thinner and thinner, it’s reduced to almost nothing.
Sukuna can tell the problem-inducing girlfriend senses the tension, she seems fairly distressed while they’re bickering. She wonders how the girl would react seeing the two of them fight, like physical fight which includes violence and blood. They do it often, if not every day after all.
“It’s alright, Yuuji.”
Sukuna quirks her brow, watching how Megumi’s gentle words magically soothe her little brother in no time. The flame in his eyes is gone, and replaced with a disgusting affectionate look instead.
“I don’t like it when she talks to you like that, babe.” The brat whines like a bitch in heat, his hand tugging on his girlfriend’s clingily.
“I’m fine.” Megumi nods to Yuuji, then stares straight into her eyes. Sukuna thinks it’s the greenest eyes she has ever seen. Plus, the wild lashes are very enviable too.
“As Yuuji said, this is my first time at the gym, Sukuna-san. I haven’t done much workout before, maybe cycling and a couple of home workouts, although nothing serious.” She adds a quick polite bow, “I’d appreciate your help.”
Sukuna tips her head back, “Well, you have a lot to work on before we can start building your muscles. We need to correct your basics first, then move on to more effective stuffs.”
The girl jerks her head obediently, “Okay.”
“Good.” She looks at her, then at the mat. “What are you waiting for? Stretch.”
Yuuji slings his arm over Megumi’s shoulder and pulls her away, “C’mon, I’ll help you, babe.”
Megumi ducks her flushed face in a sheepish manner, as if the brat hasn’t been spoiling her from the moment she set her feet at the gym. She lets Yuuji assists her nevertheless, or more like stretches together with her.
They’re so engrossed with each other. It’s only a goddamn stretching, yet they can’t keep to themselves; constantly joking and giggling like everybody else doesn’t exist.
Sukuna cringes.
Lovebirds tend to do things that make her feels sick all the time. It’s even more gross coming from her brother. Straight putrid. She just has to banish it from her sight fast.
A wicked grin settles on Sukuna’s mouth.
She makes a bee-line towards the brats, specifically targeting the lanky girlfriend. The girl tenses up her pathetic excuse of straddle stretch; and Sukuna seizes the perfect opportunity. She places a firm hand on her lower back, then shoves her further into the ground.
“Lower.”
She smirks as she catches Megumi hissing. Sukuna grins and keeps forcing her down. She wants Megumi to feel the burn on her inner thighs, her hips, her hamstrings, everywhere.
“Ah!” The girl finally breaks a small yelp that feeds Sukuna’s malicious intent.
She releases Megumi and howls, “Your girlfriend is stiff as fuck. You guys never done it or what?”
“Sukuna!” Yuuji snarls, though his face is bashfully ablaze.
Good, let him be ashamed.
Sukuna snorts, knowing her brother is all bark but no bite. She’s about to tease them more, when the girlfriend’s tiny voice catches her off guard.
“We have.”
Sukuna blinks, debating on whether or not she heard that right. “I’m sorry, what?”
“We have. Done it.” The girl fiercely glares up at Sukuna despite keeping her head close to the mat. That’s certainly not the attitude she has displayed to Yuuji earlier.
Sukuna breaks into a pile of laughter. It’s is too funny.
This feisty brat is so fascinating.
“Yeah?” Sukuna licks her lips, mouth splitting wide in mocking way. “Tell me, Girlfriend-chan. Was he good at it? Did he even last long? Bet he didn’t.”
“Shut it, Sukuna!” Yuuji’s whole face is bright red, and the blush spreads to the tip of his ears. He abruptly stops stretching to speak to his girlfriend. “Don’t listen to her, babe. She does that often to annoy people.”
Megumi lets out a heavy breath, like she’s so tired and done, yet gives no response. She slowly raises her upper body and shifts into seated side stretch. Her movement is fluid and graceful, it holds Sukuna’s sole attention. Such a sight to behold.
“So?” She demands answer from Megumi.
The girl gives Sukuna side eyes. “Honestly, it’s none of your business, Sukuna-san. With all due to respect.”
Sukuna shrugs.
“Got it, Me-gu-mi.”
She drags the syllables flirtatiously; crimson eyes drinking on the sliver of the girl’s milky abdomen.
Sukuna’s gaze greedily travels up to her bosom, her neck, her lips, and to her hostile emeralds. Megumi is glaring at her under the sooty wisps. She is frowning, and she’s frowning deep.
The girl whispers something to Yuuji who then immediately moves to sit close, completely obstructing the view.
Well, two can play a game.
“Show me your squat.”
“Huh?” Megumi bobs her head, “Okay.”
The girl widens her stance, her feet shoulder-width apart. She has small ankles, so dainty Sukuna fears they break. Megumi extends her arms and keeps it together, then she bends her knees. Her body sinks lower into a figurative sitting position.
Sukuna winces, “Wrong.”
Megumi shoots up and asks, “What did I do wrong?”
“A lot. Start over, I’ll correct your form.”
She follows Sukuna’s advice and gets into her stance again.
“Engage your core.”
She glances at her, “Then?”
“Bend your knees, push your hips back.” Sukuna waits, only for Megumi to do the exact same thing as she has done seconds ago.
She groans, “No, your knees should be open, as well as your chest.”
Sukuna goes out of her way to grab Megumi’s bony shoulders and spread them outwards, “This one too.” She pats her knees, opens them up, and takes a step back to observe her form once again.
“Don’t lean forward, I said engage your core. Are you deaf?” Her hands slip to support the girl’s lower back, and to push back her stomach. “Lean back.”
Megumi mutters, “I can’t.”
“That’s because you’re looking at the ground. Look straight, don’t look down.”
God, her body is as rigid as a brick. Sukuna rubs her face in frustration. “Your head should face forward.”
Megumi sighs and scrambles back into standing position, “Can I see you doing it first?“
Sukuna grunts, but agrees nonetheless. She easily shows Megumi the right way; feet apart, arms forward, hips back, then asses down. “Like that. Remember what I’ve said to you.”
“Excuse me. Once again, Sukuna-san. Slower this time.”
This youngling is lucky that Sukuna really likes her face. Otherwise, she can say goodbye to those unblemished skin, because Sukuna would love to punch someone right now.
“Feet apart.” She stands firmly, and Megumi follows suit. “Tighten your core.” It’s hard to see over the baggy shirt but she seems okay. “Face forward. Arms out.” She copies her move just fine.
“Bend your knees. Keep your hips back.” Looking good so far.
“Lower your butt.”
As soon as it comes to this step, Megumi’s knees buckle inwards.
Sukuna throws her arms in the air, “Oh god. You’re hopeless. That’s why your ass is nonexistent.”
“Sukuna–“ Yuuji starts, and it’s not the best timing ever. Sukuna’s not in the mood to deal with his shits. She can and will snap right here right now.
Thankfully his sweet girlfriend raises her hand to intercede.
“Wait. Let me try again.” Megumi squats down and holds her position. The form is still questionable, but at least it’s getting better.
Sukuna squints her eyes, “Try it more.”
She concedes and does a couple extra, not perfect but definitely improving.
“It looks easier when you do it.” Megumi says, not sure if it’s meant as a compliment, though Sukuna is so bad at handling one.
“I squat hundreds, that’s why it looks easy, brat.”
The girl shakes her head, “No. I think there’s something inherently different, even though I’m trying to follow your instruction. My form is different than yours.”
Sukuna jerks her chin, “Let me see it again.”
Megumi squats down and pauses. “I don’t know how you do it. It’s like your butt protrudes more.” The girl says it with the flattest tone ever, whilst trying to correct her squat form continuously.
Sukuna clears her throat. Her cheeks are growing a bit too warm to her liking. There’s something about the way Megumi innocently mentioning lewd things that shoots right through her groin. She finds it a little obscene, even when the girl delivers it with such a deadpan face.
“Where do you feel the soreness, brat?”
She contemplates on the question. “It’s my thighs. I thought squat supposes to be a butt exercise. Do you think I’m doing it wrong?”
“You may be a quad dominant.”
Megumi bats her lashes, “As in, relying more on quads?”
“Yes.” Sukuna adds, “Often happens. Our glutes are naturally weak. Quads are much stronger, that’s why they end up supporting most weights. They’re overpowering the glutes.”
The girl gazes at her calculatingly, “So, you’re glute dominant?”
“I have to avoid straining the quads. It’s not good for your knees and ligaments, higher chance of injury.” Sukuna scratches the back of her neck, “That’s why I ask you to repeat the form over and over.”
Megumi listens to her earnestly, pouring her entire attention to her; and fuck, the awkward emotions stirring in Sukuna’s guts right now is so foreign. Her throat constricts and her chest is tight. It’s not something she has ever felt before.
“Aren’t women tend to be more quad dominant? I’ve read it somewhere; the bones are angled inward because of the wider hips.” Megumi looks up, her lashes flutter oh so prettily.
“It’s very impressive that you can pull out hundreds of them, Sukuna-san.”
Fuck.
The fuck Sukuna do with this perfect little thing?
She looks away, face heating up in embarrassment. “It’s nothing.”
Shit.
Did Sukuna just land a massive crush on the brat’s girlfriend?
Megumi grunts after she completes her last lunge, then collapses on the floor. Her chest heaves for air, clothes sticking to her skin, thoroughly drenched in sweat.
“I hate lunges.”
“You’ve still got plank.”
She huffs, “Thanks for reminding, Sukuna-san.”
Sukuna extends her hand to help her stand, “Drop the honorifics. Just Sukuna is alright.”
The black-haired girl looks puzzled. Sukuna can sees her own flustered reflection mirrored through Megumi’s clear eyes, and fuck that’s so humiliating.
“Come on, get up.” She roughly yanks the girl’s arm.
“Why do I need to get up for a plank?”
That’s why she’s confused.
“Well, you need a water break, missy.” She lies. “Your boyfriend would kill me if I left you dehydrated.”
Sukuna means it as a joke. Hence, she’s not prepared for Megumi coming back at her.
She furrows her dark brows in disapproval, “No, he won’t. Are we really talking about the same person, Sukuna? Because the Yuuji I know won’t even hurt a fly.”
Sukuna cackles.
Oh boy.
Sukuna, of all people, understands the most that Yuuji can and Yuuji will hurt anyone who harms the people he loves. She’s the one who put that mindset on him, after all. That’s the very reason why Sukuna and Yuuji got into a fight all the time, both of them are too stubborn to succumb.
“Right.” Sukuna musters up a smile, “Then he must hold you very dear, Megumi.”
“… I don’t understand.”
Sukuna sighs, “You don’t have to.”
Megumi’s borderline curious-sympathetic stare makes her stomach flips.
“Get into your position.” Sukuna groans.
...
Teaching Megumi has been nothing but a challenge.
She learns the instruction fast, but her body doesn’t. It’s been exhausting, yet Sukuna loves every second she spent. Aside from her attractive face, Megumi makes a very enjoyable company. The girl’s smart, curious, and unyielding. Her jokes are bone-dry, but Sukuna finds herself smiling at her.
So, when it’s the time for them to part, all Sukuna can think of is when they’d get to see each other again. She insists on driving her and Yuuji home; the ride is painfully quiet since they’re beaten up with fatigue.
Sukuna constantly checks on them through the rear-view. Her useless brother dozes off, whilst Megumi is giving Sukuna direction to her house.
“You can stop here, it’s the one on the left.” Megumi gathers her bag. “Thank you so much for today, Sukuna-san. I’m sorry for crashing on your gym schedule.”
Sukuna rubs the nape of her neck, “No worries. I’ve told you to call me Sukuna.”
“Alright.” Megumi tries. “Sukuna.”
“Mm. Good girl.”
Megumi presses her lips together, looking slightly demure.
Sukuna clears her throat. She reaches back to smack Yuuji’s legs, “Oi, brat. You girlfriend’s leaving.”
The boy jolts from his seat, and shakes his head to rid of the remaining sleepiness. “Oh my god, sorry, babe.” He surges forward to kiss Megumi’s cheek sloppily, “See you later?”
“Hn. Later.” Sukuna watches Megumi leans to kiss Yuuji’s mouth, and fuck if that doesn’t hurt.
“See you later, Sukuna.” Megumi says.
“Later, kid.” She takes a sharp breath, “Come to me anytime you need help.”
Megumi blinks her eyes a couple time then nods, “Okay.”
It’s been a week since the last time she saw Megumi.
Sukuna has been thinking about her all the time. It’s pathetic. She doesn’t even understand why does she get so infatuated with her. Megumi’s indeed beautiful, but she is more than pretty face. There’s something about her Sukuna can’t fathom. It’s like Megumi awakens an odd longing inside her heart. She wants her.
Sukuna sighs.
She doesn’t even know if Megumi swings that way, and she’s Yuuji’s lover on top of that.
“Oi brat.”
“Hm?” The boy is absorbed in his phone, his fingers are typing rapidly.
“How’s Megumi?”
“She’s ok.” Yuuji’s gaze is focused on the screen.
Sukuna chews her lips, “She’s not coming to the gym?”
“No. Gojo-sensei trains her, there’s no need for her to go to a public gym.” He looks like he’s reading a chat and writes out more on his phone.
Who the fuck is Gojo-sensei? And why would this person train Megumi in private?
“Who’s Gojo?”
Yuuji rolls his eyes, “You really never listen, don’t you. Gojo-sensei is her guardian.” He throws her a dirty look. “I thought you don’t care.”
Sukuna shrugs. “I don’t. Just asking.” She stares at her coffee mug, disheartened. “Tell her that I can help whenever she needs me. Y’know, with gym and stuffs.” Sukuna gulps the last drop of her coffee.
Yuuji suddenly twists on his seat to face Sukuna. His eyes are as wide as the size of a saucer, bulging out like it’s going to pop out from its socket.
It’s a horrifying sight. And Sukuna is lowkey caught off guard.
“What the fuck, brat? Why are–”
“Sukuna!” Yuuji yells, his face is contorted into something like a mixture of shocked realization and a hint of fury.
“Are you– Do you like Megumi?!”
Sukuna opens her mouth, then closes it again; because really, she doesn’t have anything to say to defend herself.
Yuuji gasps, his jaw’s wide open.
“What the hell, Sukuna?! You know you can’t like her. She’s my girlfriend!” Yuuji’s hysterical. He stands up from his seat, approaches Sukuna, and grabs the collar of her shirt.
“I know.” Sukuna says, casting down a crestfallen look at Yuuji. It lasts for a miniscule of time before her eyes turn angry red.
“I fucking know, brat. I’m not blind. So what if I like her, huh? She’s fucking in love with you, asshole! Nothing will change, goddamnit.” She spits out and aggressively pushes Yuuji away from her.
Yuuji balls his fist, only in the meantime it’ll hit Sukuna’s face.
“Fuck you, Sukuna!”
“Well, fuck you too!”
...