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001 ─ STUTTER

art by @3vangel1ne_ on X, dividers by @priestboy <3

SYNOPSIS: You fail your exam. Badly. Luckily for you, the top student in your major offers to tutor you. Unfortunately (or fortunately?) for you, he brings his twin brother along.

PAIRINGS: AFAB!Reader x Gojo Satoru, Gojo Satoru x Reader, Nerdjo x Reader, Fratjo x Reader, Nerdjo x Reader x Fratjo

TAGS: JJK, Jujutsu Kaisen, JJK College!AU, Nerdjo, Fratjo, Gojoverse, Gojo twins, Author insert because I'm also a Computer Engineering Major, AO3 was down so I'm posting here

NOTES: Chapter 1/? (Will update more soon :p) & not proofread because I'm a bum

losin' all control when you get close, yeah

“I’ll be distributing your exam papers.”

You heard the whole class groan. Being a Computer Science major is difficult. Being an Engineering major is just as hard. But when you mix the two? You have the one hell of a major you’re taking right now: Computer Engineering. It’s no surprise students decide to shift term after term.

The figure with white hair, crooked glasses, and an oversized hoodie stood up from the front seat (and he was the only one in that row) as the professor beckoned him to help distribute half of the paper. Satoru Gojo.

Teacher’s assistant.

Top of the batch.

Close with the professors.

But not so close with his peers.

“Make sure you return the paper at the end of the class. It’ll serve as your attendance,” your professor said, handing out the other half of the papers, with no reaction. Was that a good or a bad sign?

You sat on your chair, one leg shaking from anxiousness. Where do you even look– at Satoru or your professor? Why isn’t this arranged alphabetically? Who has your paper right now? Did Satoru check your paper?

Your heart sank to your stomach as Satoru’s figure loomed over you, standing at 6’3; he could basically cover the light source above you. He stood right there, lingering a little too long in front of your desk, probably taking in your presence and the way you looked so small underneath him. The distance between you and him was insanely close, you could basically smell his perfume. Could see the way his hoodie shifted with even a small twitch. Could feel the heat radiating from his skin. Could hear him breathing. Could imagine his glasses falling down while you—

No.

What the fuck, since when did this nerd have some sex appeal?

A soft sigh escaped your lips– No. You’re probably just anxious about the exam. Everyone’s tense in class, and so were you. You did what you could but some part of you knew you flunked it. Yeah, all this nervousness is just coming from this subject and definitely not the way you were eye-to-eye with his abdomen.

He called out your name to check if he was looking at the right person (and to see the way your eyes locked with his when your head shot up). You gave him a curt nod, and he handed your paper to you, his fingers brushing lightly against yours. That small contact sent a shiver down your spine, and you were lucky to catch his reaction: him jolting and his face flushed red. At least you weren’t the only one responsive to this… situation.

You were hesitant to flip the paper in front of you. Hell, you were even hesitant to take it from Satoru and just say that you’ve already accepted your fate. But alas, you have to, or your mind won’t be at ease.

And so you did. You quickly flipped your paper, covering the upper right corner to check your score.

5/100.

Damn, what the fuck.

A soft, bitter and defeated laugh escaped from your lips. Not even two digits?

You saw Satoru glance at you when he heard your laugh with concern etched on his face.

Holy fuck, you’re doomed.

You wanted to crumple, tear, or even burn the paper– until you saw a small blue note sticking on top of it on its lower corners.

‘Message me what time your classes end. I’ll meet you at the library after :) - Toru’

Your eyebrows furrowed. Was this note really meant for you?

Your eyes searched for Satoru’s figure, only to see him settling on his seat in the front row. It was like your mind had telepathically communicated with him to look at you because he really did.

You showed him the note and gestured to point at yourself. ‘Me?’

He simply nodded and quickly turned his attention back to your professor. But you didn’t fail to catch the faint hue on his cheeks and the way he folded ever so slightly after that interaction.

You took your phone out discreetly to send Satoru a message, but as you searched through your contacts to look for his name, you realized you don’t have his phone number. You blinked. How the hell will you even—

Oh, E-mail!

Your fingers rushed to open your university E-mail and entered his name as the recipient. All the student emails had the same format, anyway, with an underscore separating the student’s first and last name.

To: [email protected] Subject: Regarding my class schedule Hi, Satoru! I’m sending you an email instead of a text message since we don’t have each other’s numbers yet, haha. My classes end at 4:15 PM. See you :)

As you hit ‘Send’, your mind immediately switched to creative mode and imagined being beside him in the library and listening to him talk about nerdy shit. Blah blah blah, Fourier Transforms, logic circuits, mesh analysis, Javascript… You’d nod like you understood anyway.

But you don’t know why you’re looking forward to it– why he’s suddenly in your radar. You knew about his existence, of course. He is your major’s top student, but you two never interacted as much as today, except for casual greetings whenever you enter the classroom and you see him alone in the front row, always in the front row, drowned in texts and formulas too advanced for your sophomore year.

Everyone would admit he’s handsome. His hair, which was as white as snow, made his piercing blue eyes pop. He stood tall, had a sharp jawline, and his lashes fluttered every time he blinked. You weren’t sure about his build, though… All you’ve ever seen him wear is his different variations of oversized Digimon hoodies and sweatpants. Typical.

But the reason why barely anyone talked to him was because he’s intimidating. Stoic. Reserved. Awkward.

Not that it’s something bad for you. You don’t mind, really.

You weren’t even listening to the class anymore. Your eyes kept on glancing– or rather, staring, at Satoru, and he could probably feel your eyes on him with the way he was fidgeting with his pen and folded even more, pulling his hood on and its drawstrings to hide himself.

You were so eager to finally talk to him. Get to know him. You’d be lying if you said your heart didn’t flutter at the fact that he initiated to talk to you at the library.

But now, there you are, standing inside the discussion room, confused as fuck.

Satoru replied to your e-mail two hours after you sent it, saying that he’ll book a discussion room at the library. He also attached his number at the end of his email. Those were the only details he provided you with.

You don’t know if it was the lack of sleep, or the amount of times you’ve hit your head on the table because of your dreadful score, but you’re seeing two Gojos. He didn’t mention this?

One definitely the same guy you saw early this morning. The other? He had the same features– white hair, blue eyes, only slightly taller than Satoru, but his build? Fucking ripped. His black compression shirt outlined all the ridges and hard planes on his body. It’s like he has a major where he needs to do deadlifts as a midterm. His demeanor was a sharp contrast to your classmate’s; he was awfully smug and laid back.

You rubbed your eyes in confusion. Maybe one will go away or they’ll merge into one.

Nope. Still two Gojos in front of you.

The Gojo on your left, your classmate, sensed the confusion. He cleared his throat, his eyes refusing to look at yours, and his tone of voice was soft. “Um, sorry.. You were probably expecting only us two, but I found out that discussion rooms needed three people minimum in order to be booked. So… I asked my twin to come along. I wasn’t able to tell you ahead of time, and I apologize.”

Twin? This dude has a fucking hot and ripped twin?

“Ah..” You replied, as if your confusion subsided, but you merely nodded your head as you settled to sit across the two of them. “I see, and it’s alright. I never knew you had a twin.”

Satoru’s twin shifted in his seat, leaning towards you from across the table, a fake pout on his face. “Huh. My own brother doesn’t talk about me? That’s sad.”

He earned a nudge from Satoru. “I don’t… really talk about my personal life. Besides, I thought she knew about you. You're the president of the biggest frat in this university.”

“She doesn’t seem to be interested in that kinda stuff,” the other twin said, a small smile now plastered on his face as he held one hand out. How did he know that? “I’m Satoshi Gojo, by the way. Nice to meet you.”

You took his hand in yours and gently shook it. His hand gripped yours a little too tight, and his eyes were piercing into yours, like he was some hawk watching its prey, observing your every move.

You gulped.

“Nice to meet you too, Satoshi,“ you replied, pulling your hand away from his grip, trying not to let his stupid smirk get to you.

Satoru already knows Satoshi was brewing mischief in his head with the look he was giving you. He heaved a sigh and flicked his brother‘s forehead as a warning before turning to you.

“Ow. That’s not ni—”

“Anyway…” Satoru cut him off and shot him a glare, and Satoshi quickly shut his mouth, leaning against the chair as he raised both his arms in defeat. It seems like Satoru acts a tad bit different when it comes to his brother. Is he the older one?

You adjusted your seat, pulling it closer to the table. “Right… um, why did you want to meet me here, Satoru?”

A thin line formed on his lips. He was trying to be careful with his next words. “It’s about your–”

“He’s saying you flunked that exam pretty bad.”

Silence.

Satoshi said those words in such a calm and loose manner it kind of infuriated you. Like it was just another day and it was a normal occurrence. It wasn’t for you, though. You’ve always hated failure.

But how did he know in the first place?

Warmth rushed to your cheeks, either out of embarrassment, or anger, or both– you don’t know. You don’t care. You just wanted to punch that carefree look on his face, your hands were already curled into a ball and ready to smack the shit out of him.

Until you saw the table jolt slightly and heard the frat twin groan in pain.

“That’s the second time—”

“Maybe it’s because you need to shut up.”

Satoshi scoffed, one arm hanging in the air as he placed it on the backrest. “You’re acting all tough, lil’ bro. Tryna impress her?”

Little bro?

So Satoru’s younger… and somehow still the more rational one.

The tough facade— whether it was a facade or not, faltered from Satoru’s face. He was as red as the time you were staring at him in class, probably more, and that sight made your anger dissipate a bit.

“What the hel— heck are you even talking about?” Satoru mumbled, fiddling with the drawstrings of his hoodie again. He couldn’t even say the word hell. Shaking his head and turning his attention fully to you, he spoke up, “Please don’t mind him, he’s very much a pain in the ass sometimes.” Satoshi rolled his eyes at that statement. “But yes, this is about your recent exam results.”

You slumped in your seat, your head down, eyes fixed on your lap, and prepared for a lecture from Satoru, or worse, him telling you that the professor doesn’t think you’ll be able to pass the course.

“I helped check the papers,” Satoru said, fixing his clear, square glasses that were slipping from his nose. He brought out a ridiculous stack of notes, specifically for the Digital Signal Processing course, and placed them on top of the table. You felt your stomach churn just by looking at the front page of every stack of notes he had, dreading his next words.

He observed your reaction, he always did, and he couldn’t help but stifle a soft laugh. “I figured you’d be disappointed with the result, so I’m willing to tutor you with any course you need help with.”

Your head shot up at his words, a glimmer of hope in your eyes. You looked at Satoru like he was an angel sent from the heavens above, and god, did he look like one.

The discussion room the three of you were in had big windows that allowed you to see the view below. It also allowed the sunlight to shine directly on Satoru’s skin, as if he had a spotlight on him, and it highlighted his features— his white yet slightly messy hair, his glasses that were sitting on his nosebridge, still slightly askew even with the number of times he tried to fix it, his long lashes casting shadows over his eyes, and, god, his plump lips. You don’t know if you want to ask him for his lip care routine or if you want to know how it would feel to have your lips on his.

And Satoshi caught the way you looked at his brother. Of course he did.

But he didn’t dare say anything. He just sat there, observing the growing chemistry between you and his little brother. It’s not like he’s even slightly interested in you.

Or, that’s what he’s been saying to convince himself.

“But— but isn’t this a specialized subject?” You asked Satoru, confused. “I thought your org doesn’t offer tutoring sessions for specialized subjects?” That question made Satoru fall silent for a good few seconds. It was deafening.

“I-I— Uh, I’m n-not doing this as some org-related stuff,” the nerd twin mumbled, his face as red as the whiteboard writings behind the twins. “I’m just— I just learn better when I’m teaching… s-someone.”

Lies. Definitely.

He just doesn’t want to admit that he wants to spend time with you and hopefully know you better.

And Satoshi knows this. He could read his brother like an open book.

It made him snort and laugh, which turned both of your attention to him with an expression saying, ‘what’s so funny?’

He shook his head, his hand dismissing the two of you. “Oh nothing, nothing. Just… continue with your tutoring session.”

And so the two of you did. Even with Satoru’s flustered expression.

“So… let’s start with the fundamentals and conceptual stuff,” Satoru said, pulling his notes from the bottom of his stack of paper, his voice still soft and filled with awkwardness. “Do you know the difference between analog and digital signals?”

You simply nodded.

“Okay, then. Differentiate them,” he said, leaning against the backrest of the chair, fucking manspreading, his voice now stern and strict. His pen– wherever the fuck he pulled that out from, was now tapping his lower lip, and his head was slightly tilted to the side. What the fuck, he was literally all flustered just seconds ago?

First of all, you weren’t aware that the tutoring starts right now. Second, with the way he was looking at you, it was like everything you knew was thrown out of the window.

You stammered. Like genuinely struggling to speak. “U-um.. It— They’re— Analog— Fuck.”

What the actual fuck is happening right now?

“Breathe, sweetheart,” you heard Satoshi tease, and you burned at his sudden endearment. “My brother doesn’t bite.” You gave him a glare, your cheeks still awfully red, before inhaling the air heavily, and then breathing it out.

Just focus, please. You basically begged yourself.

With a soft exhale, you explained what you knew. “Analog signals are continuous— continuous in time, while digital signals are discrete in time. Analog signals can take any values within a given time range. Digital signal values are usually represented with the values 1 or 0. From how I understand it, that’s how digital signals are less susceptible to noise, because the values are only either 1 or 0, compared to analog signal values…”

He gave you a curt nod. “Good, at least you know the concepts, even if it’s simplified. Now, what’s the difference between signals and systems?”

Holy fuck, is this a hidden second part of your exam?

“Oh my god— okay, um… Signals carry information. Systems process those signals to produce output responses.”

“Unit step. System or Signal?”

“Sys— I mean, signal.”

“Unit impulse. System or Signal?”

“Signal…?”

He raised an eyebrow at your uncertain tone.

“Impulse response. System or Signal?”

“System.”

“Good try, but no.” That made your heart sink. “An impulse response is also a signal. It characterizes a system, since it is often used in convolution. It’s the output of a Linear-Time Invariant system when the input is a unit impulse.”

You took a mental note of what he said. “Impulse response is a signal— got it.”

As the two of you were exchanging questions and answers, answering word problems, Satoshi sat there, quiet. Still observing your interaction with his brother. Observing your every move. Taking note of how your hair fell down to your shoulders whenever you shifted your seat. Of how your eyebrows furrowed whenever you encountered a difficult problem. How your tongue poked out as you wrote your solution down. How your lips formed a small pout whenever Satoru said you got something wrong.

He’d shift majors if it meant to see you like that everyday.

“You always forget how correlation works,” Satoru pointed out on your solution with his red pen, giving your answer a big circle. “Convolution and correlation are essentially the same, but the main difference is that convolution needs to flip one signal.”

You melted in your seat. Your brain was already fried with all the questions and problems Satoru was throwing at you, you’re mixing up the processes in solving the problems.

“You applied the table shortcut we discussed, and you know how it works, but you still flipped one of the signals. Correlation doesn’t need the flipping.”

“My god… I’m gonna end up flipping another thing,” you muttered, gripping the table. “My brain is so fried.”

And just as Satoru was about to hand you another problem, Satoshi’s voice echoed through the walls. “Alright, nerds. Time out.”

Nerds? Your heads whipped to Satoshi. Satoru had no reaction on his face, just looking at his brother with the ‘what now?’ look. Oh, to be as smart and nerdy as Satoru…

Satoshi raised his phone up to show the time. 7:23 PM. “It’s getting late.”

Being with Satoru increases your productivity, it seems.

You stretched your arms, yawning in your seat. You don’t want to leave yet, but your body was slowly betraying you. Your eyes were closing shut while you were solving the problems earlier. “That late already? Gosh, I didn’t even realize… I was too focused on that graphing problem.”

“Mmm… Well, you did a great job today,” Satoru praised, a small hue on his ears, as he took your paper. 39/100. That’s still an improvement, no?

His blue eyes looked at you once again after what seemed like an eternity ever since the last time he did. “You’re improving. By the end of this week, you will be able to master the topics covered in our first exam. For the next two weeks, let’s cover the topics for the second exam. We’ll have enough time.”

Determination and excitement rushed through your veins— is it because you’ll be seeing Satoru more often now, or is it because you actually have hope to pass this hellish course?

You’re pretty sure it’s the first one. But hey, at least you have motivation now!

“If everything goes well this week, feel free to come to my party on Saturday,” Satoshi butted in, and your eyes widened at his invitation. “Y’know… as a reward? Let loose after solving whatever the fuck systems are?”

Satoru’s eyes were now filled with concern as he looked at you. “Do you drink?”

“I do,” you responded, fiddling with your pen. “Just never had the time recently. I would love to go, though. Especially after that… exam.”

An uncomfortable feeling settled in Satoru’s stomach. Jealousy? Protectiveness? Possessiveness? He’s not entirely sure, but that feeling made him blurt his next words without even thinking. “Well, that’s up for me to decide.”

“Woaaaah,” Satoshi exclaimed in surprise, taken aback by the sudden boldness his brother was exhibiting. It amused him, very much so, with the way you affected Satoru. “Easy there, lil’ bro. Possessive of her already? It’s not like I’m planning to steal her— well, at least not yet.”

Aaaaand the stern and strict Satoru was now long gone. He’s back to his shy, stammering self, shaking his head vigorously as if you showed him his biggest nightmare. “What the heck are you talking about— T-that’s not what I meant!” He shrieked, his hands forming a big ‘X’. “If she significantly improves by the end of the week, then of course she could go. As her tutor, I want to ensure she’s doing well academically and prioritizes her academics…”

“But not allowing her to relax is a bad tutoring method, no?” Satoshi’s shit-eating grin made Satoru lose his shit even more. “Besides, you’re invited to the party too. So, why restrict her?”

“You know I don’t drink alcohol.”

“Time to try it, then.”

“But I don’t want to.”

“But she’ll be there—”

“Shut it—”

“Guys…”

The twins looked at you in an instant.

“Satoru’s right, I need to set my priorities first,” you muttered, a bit of disappointment in your tone. You really want to go, but you know you have priorities; you want to pass. And you don’t want to erase all the effort Satoru’s giving you.

Satoru looked like he just won the lottery. Satoshi was giving you a loud “booooo.”

Your eyes then shifted to Satoshi. “But I didn’t say no. As long as I improve by Friday…” trailing, you looked at Satoru this time again, and he swears you looked like a lost puppy. “It’ll be Satoru’s call, whether I’ll attend the party or not.”

“Deal,” the twins said in unison. Finally, no more bickering.

You swung your bag to your shoulder. “Then it’s settled.”

Before you could even step out of the discussion room, you felt a hand grabbing your wrist.

“U-um… message me once you get home,” Satoru muttered, mostly to himself, but he was loud enough for you to hear. He didn’t even look at you when you said that; he just fixed his glasses for the nth time today.

Cute.

“I will, don’t worry,” you reassured him, and even then, his hand hesitated a little to let go of you. “Get home safe, you two.”

When the door clicked shut behind you when you left the room, that was the only time Satoru was able to breathe properly. And neither of the twins decided to speak for a good few minutes— the only thing heard in the room was the sound of Satoru shuffling as he packed his stuff.

Until Satoshi decided to break the silence. “Well that was interesting.”

Satoru didn’t bother to look at his brother. “How so?”

“You were panicking. I think she knows.”

“Shut up. I was just tutoring her.”

“Yeah, and no tutor stammers and feels flustered around their tutees.”

Satoru ignored him, focusing on organizing his bag. What’s his deal? Why does he even care?

Satoshi’s eyes were still staring at where you were seated, then at the door where you left.

“...She’s cute.”

That made Satoru stop his movements, his bag zipped only halfway. His body was tense, and he didn’t dare to look at his brother.

Satoshi enjoyed seeing him lose his mind.

“Relaaaaax,” Satoshi said, lazily, crossing his arms. “I’m not planning to steal her.”

Satoru heaved out a sigh.

“—yet.”

Satoru shot him a glare sharp enough to cut glass, and Satoshi could only laugh.

“Man,” he said, pushing himself off the table, “Saturday’s gonna be so fun.”

#miuwrites #JJK #Jujutsu Kaisen #JJK College!AU #Nerdjo #Fratjo #Gojo Satoru #Gojoverse #Gojo twins #Gojo Satoru x Reader #Nerdjo x Reader #Nerdjo x Reader x Fratjo #i love nerds

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