Chapter Text
Sukuna sat behind his desk, a stack of papers spread before him as he worked through the latest batch of assignments. The rich scent of ink and aged paper lingered heavily in the air, mixing with the faint aroma of black coffee that had long since gone cold beside his elbow. Golden afternoon sunlight filtered through the tall office windows, casting long shadows across the polished wood of his desk and illuminating the dust motes that drifted lazily through the still air.
The campus had mostly emptied for the afternoon, leaving the academic building quiet aside from the occasional muffled conversation drifting through the hallways and the distant echo of footsteps against tile floors. The steady hum of fluorescent lights and the soft scratch of his pen against paper were the only sounds that accompanied him. Now and then, the old building creaked softly as it settled, the sound fading almost as quickly as it appeared.
It was the kind of silence he preferred.
Unfortunately, a sharp knock on the door interrupted his concentration.
His jaw tightened in irritation, his teeth grinding together briefly before he finally looked up from the paper in front of him.
"Come in."
The door cracked open slowly, and a familiar head of white hair appeared through the gap.
Satoru Gojo.
For a moment, Sukuna forgot entirely about the paperwork in front of him. His irritation faded quickly, replaced by reluctant fondness.
The omega hesitated near the doorway, clutching a notebook against his chest so tightly that his knuckles had nearly turned white. His shoulders drew tight beneath the oversized fabric of his sweater, looking like he was already bracing himself for the same criticism Sukuna gave all of his students.
The afternoon sunlight caught in his pale hair, creating a silvery halo around him, while those impossibly blue eyes remained fixed on the floor. Even from across the room, Sukuna heard the faint rustle of fabric as Satoru shifted his weight nervously from one foot to the other. His fingers fidgeted against the edge of the notebook, betraying the anxiety he so clearly tried to suppress.
The sight was strangely endearing.
Sukuna hated that word.
Still, he found himself watching as Satoru stepped inside and quietly shut the door behind him. The soft click of the latch sounded louder than it actually was in the enclosed office.
"What is it?" he asked.
Bright blue eyes lifted to meet his for only a second before darting away again, and that brief moment of eye contact sent an irritating flicker of satisfaction through him.
"I-I had a question about the assignment."
Of course he did.
Unlike most of the students unfortunate enough to occupy his classroom, Satoru actually cared about his grades. The omega was intelligent, diligent, and incredibly curious—a trait Sukuna happened to find rather important for learning. Half the time, the questions he asked were better than the answers most of the other students provided. He actually read the assigned material, paid attention during lectures, and possessed the seemingly rare ability to think both critically and logically.
Sukuna motioned toward the chair across from his desk.
"Sit."
Satoru obeyed immediately.
As the omega began explaining where he was struggling, Sukuna listened far more closely than was probably necessary. His gaze lingered on the way Satoru's fingers tightened around his pen whenever he became nervous, the plastic creaking softly beneath pressure. He noted the way the omega's brow furrowed when he concentrated, and the way his lips parted slightly whenever he became lost in thought, only to press together again as he searched for the right words.
The faint scent that drifted across the desk whenever Satoru leaned forward proved equally distracting. It was clean and sweet, reminding Sukuna of early spring and laundry detergent. Every so often, a loose strand of white hair slipped across his forehead, and Satoru absentmindedly brushed it back without interrupting his explanation.
The sound of his voice was no less distracting. It remained soft and careful, occasionally stumbling whenever uncertainty crept into his words. Every hesitant pause and quiet apology only drew Sukuna's attention further.
Months ago, Sukuna had convinced himself his interest was harmless; he was simply looking out for one of his students and nothing more. But that explanation became harder to believe with every passing day.
He knew which cafe Satoru studied at after classes, down to the corner table he preferred near the back window. He knew which route the omega took to get home to the off-campus dorms, including the streets and alleyways he avoided whenever possible. He knew which days he stayed late in the library, surrounded by towering shelves and dusty books until long after sunset, often leaving only after the campus had grown nearly deserted and the librarians had to kick him out.
It was information he absolutely did not need to know, but he knew anyway.
Worse, he remembered every detail with unsettling clarity. The way Satoru wrapped both hands around a warm drink on cold mornings. The pastries he ordered most often. The books he checked out most often from the library. The exhausted expression he wore after particularly difficult exams, and the faint shadows that settled beneath his eyes whenever he had pushed himself too hard.
None of it was information a professor should have possessed.
Yet each was etched permanently into Sukuna's mind, impossible to ignore and even harder to forget. They surfaced without invitation whenever his thoughts wandered, weaving themselves together until they occupied far more of his attention than they ever should have.
When their discussion finally ended, Satoru gathered his things, carefully sliding his notebook and pen back into his bag before standing.
He offered a small, shy smile. "Thank you, Professor." The omega paused, his gaze lifting one last time before he turned toward the door.
Sukuna leaned back in his leather chair, the worn springs creaking softly beneath his weight as he watched the subtle slump of the omega's shoulders. His fingers tapped against the armrest before falling still.
"The library closes early tonight," Sukuna said, his voice low. "It would be a waste of your intellect to spend the evening staring at a textbook you've already mastered." He let the silence linger, arching a brow. "Go home, Gojo. Get some sleep."
Satoru blinked, slowing as he turned back toward him. Confusion softened his features, his plush lips parting slightly.
"...How did you know I was going to go to the library?"
Sukuna didn't move from where he sat, still reclined in the leather chair. Behind the carefully maintained mask of indifference, however, his thoughts raced. He had come dangerously close to revealing too much, though the mistake was easily salvaged.
"I hear things from the students," he said at last, allowing his position as a professor to provide a convenient explanation. His tone remained dismissive. "I know you spend most of your evenings in the library. I've seen you there myself on occasion, and your peers talk."
It was a believable excuse, and far preferable to admitting he had memorized Satoru's routines months ago.
Satoru's cheeks flushed a soft, dusty pink, the color creeping steadily toward the tips of his ears. He looked down at his shoes, his posture shrinking even further into the oversized sweater as he processed the statement. His fingers fidgeted absentmindedly with the worn strap of his bag, twisting the fabric between them.
The idea that people actually talked about his habits—or that Professor Sukuna had noticed them at all—made his heart hammer painfully against his ribs. Heat spread across his face, and he suddenly found the polished floor far more interesting than meeting those piercing crimson eyes.
"Oh... I didn't realize I was that obvious," he murmured, his voice barely rising above a whisper.
He shifted his weight uneasily before allowing his gaze to flicker back toward Sukuna. The professor was still watching him with an intensity that made it feel as though every carefully constructed wall around him had become transparent. It was impossible to tell what the alpha was thinking, and somehow that made the silence even more unnerving.
Sukuna's gaze didn't waver. A flicker of something darker crossed his features at the sight of the omega's flustered state before disappearing beneath his usual expression of cold indifference.
He liked the way Satoru looked when he was confused. The slight tilt of his head reminded Sukuna of a lost kitten, and the way his long eyelashes fluttered whenever uncertainty settled into those brilliant blue eyes made the alpha want to lock him away so nobody could ever see that expression except for himself.
"You are an open book, Gojo," Sukuna stated. "Too predictable for your own good."
Satoru's fingers curled tighter around the strap of his bag until the material wrinkled beneath his grip. He felt a strange fluttering sensation in his chest that he couldn't quite name. It was uncomfortable, and he tried to ignore it.
He had spent so long feeling invisible to the world that having the most intimidating man on campus acknowledge his existence, albeit in such a blunt, almost critical manner, left him feeling dizzy. His pulse refused to slow, and he could feel the warmth lingering beneath his skin.
"I just..." Satoru whispered, swallowing before he continued. "I like the quiet."
His voice barely carried across the room.
He took another small step backward toward the door, putting distance between them. For reasons he couldn't explain, the air inside the office suddenly felt too thick to breathe. The closer he remained to the professor, the more aware he became of every beat of his own heart.
Sukuna didn't move, but his crimson eyes tracked the movement. Every shallow breath the omega took lifted the loose collar of his oversized sweater ever so slightly, drawing Sukuna's attention despite himself.
"Quiet is a luxury few people know how to appreciate," Sukuna remarked. "However, don't let your desire for solitude turn into stagnation. Intelligence without ambition is merely a waste of space."
Satoru flinched slightly, the critique landing with its usual Sukuna-esque precision. He wasn't used to being called out so bluntly, but there was a strange magnetism to the way Sukuna spoke, and every word was a challenge he felt almost desperate to meet. Even when the criticism stung, some part of him wanted the professor's approval more than he cared to admit.
"I... I have ambitions, Professor," Satoru stammered, his voice gaining a tiny bit of strength as he looked up.
He didn't want to be seen as lazy or aimless, especially not by a man who seemed to embody the very definition of success. Sukuna carried himself with unwavering confidence, the kind of man who commanded attention the moment he entered a room. Compared to that, Satoru often felt painfully small.
Sukuna's eyes narrowed, a ghost of a smirk playing at the corner of his lips. He didn't care much for the omega's insecurity, but he relished the spark of defiance that briefly surfaced beneath it. It was the only thing that made Satoru more than just a pretty thing to be guarded. Beneath the timid exterior rested someone capable of pushing back, and Sukuna wanted to see more of it.
"Then prove it. Stop hiding in the stacks and start applying that mind of yours to something more tangible than a grade point average," he countered.
His voice lacked the warmth Satoru might have hoped for, yet it did the job regardless. His unwavering gaze never left the omega's face, forcing Satoru to remain under his scrutiny for a bit longer.
Satoru gave a small nod, his face still flushed. He didn't know how to respond to that—not without sounding overly eager or, worse, foolish.
“I’ll try, Professor,” he whispered, stepping back once more.
With one last glance at the man behind the desk, Satoru turned and slipped out of the office, the door clicking shut behind him.
Sukuna remained motionless for a few seconds, his eyes fixed on the closed door. The irritation he usually felt toward the inefficiency of others had vanished, replaced by a low, pulsing heat that settled deep in his gut.
He stood up slowly, his chair creaking as he shifted his weight. With a measured stride, he walked to the door and turned the lock, the metallic click echoing through the office. He didn't need to be interrupted again, not while the image of Satoru’s wide, shimmering blue eyes and the tremor in his voice were still playing on a loop in his mind.
He leaned back against the locked door, his breath hitching as he reached down to undo the belt of his tailored trousers. The fabric gave way with a sharp hiss, and he freed himself, his hand wrapping around the heavy length of his cock.
He was already half-hard, the mere memory of the omega’s scent—that innocent, clean sweetness—pushing him toward his peak much, much faster than he had anticipated. He closed his eyes, imagining Satoru not as a student, but as something belonging entirely to him. He pictured the omega stripped of those oversized sweaters, trembling and flushed beneath him, those elegant legs wrapped tightly around Sukuna’s waist.
The thought sent a jolt of electricity through his spine. Sukuna’s grip tightened, his knuckles whitening as he began a slow, punishing rhythm. He imagined the sensation of Satoru’s tight, pristine heat welcoming him, the way the omega would gasp and arch his back under the weight of his alpha.
Sukuna didn't just want to possess him; he wanted to mark him, to claim every single inch of that fair skin until there was no part of Satoru that didn't bear the evidence of his touch. He could almost hear the soft sounds Satoru would make, the desperate whimpers of an omega who had never known a pleasure so overwhelming.
His movements grew more frantic, his breath hitching as he pictured the final moment of release. He imagined the feeling of sliding deep, pushing past every barrier until he was buried against the entrance of Satoru's womb. He wanted to fill him, to deposit his heavy load deep inside the omega, marking him internally with a seed that would tie Satoru to him forever.
The idea of Satoru carrying his weight, bloated and heavy with Sukuna’s cum, brought a primal surge of satisfaction that made his vision blur. He wanted to see those wide blue eyes haze over with bliss, the innocence replaced by a raw, aching need for more.
He imagined Satoru exhausted after a long day of study, allowing Sukuna to carry him, to bathe him, to feed him the sweets he loved while the omega leaned against him in total trust. He wanted to provide a world where Satoru never had to shrink away from a crowd or feel the need to hide in a library. He would be the only wall the omega needed, a fortress of strength that ensured nothing would ever unsettle him again.
The thought of that vulnerability, of Satoru being entirely dependent on him, triggered the final surge. Sukuna’s breath hitched, his chest heaving as his muscles coiled tight. With a low, guttural groan that vibrated through the silent office, he released. The intensity of the orgasm hit him hard, causing his body to lock up and his head to thud back against the locked door. He let out a shuddering exhale, his body trembling as the heat of his release coated his hand and the expensive fabric of his trousers.
He remained there for a few minutes, eyes closed, listening to the fading rhythm of his own heartbeat. As the fog of pleasure cleared, it left behind a cold, crystalline clarity.
He wanted a mechanism of control that ensured Satoru would never have a reason to look toward another alpha.
The current arrangement—the distance between professor and student—was a necessary facade for now, but it was also an inefficiency he could no longer tolerate. He couldn't leave the omega's future to chance or the whims of some clumsy peer who might stumble into Satoru's orbit undeservingly.
Sukuna stepped away from the door. He moved back to his desk, wiping his hand with a tissue that he tossed into the trash, yet ignoring the mess on his trousers for the moment as he reached for his phone. With a few swift taps, he sent a message to one of his subordinates.
It wasn't a complex request; he simply needed a more detailed update on the current status of the Gojo household's finances. Last he had known, Satoru had been cut off from his family due to some petty squabble.
Of course, in Sukuna's eyes, Satoru could never be in the wrong. But in this case, the omega really wasn't in the wrong; his parents demanded that he change his major from Astronomy, and he had refused.
He knew Satoru was intelligent, but the omega was also proud. If the omega were to struggle, he would never ask for help; he would simply wither in silence, spending more time in the library to avoid the reality of a dwindling bank account.
Prideful and shy. A deadly combo, really.
Nearly an hour later, Satoru was getting ready to leave the library after returning some of the books he had checked out and finding a few new ones, his heart still drumming a frantic rhythm against his ribs. He felt as though he were floating.
Sukuna's words still echoed in his mind, making him chew on his lower lip. He stopped by a large window close to the front doors, leaning his forehead against the cool glass to steady himself. He knew he should be annoyed by the bluntness, but Professor Sukuna's attention always seemed to make him react in ways he shouldn't.
His omega instincts were crying out for the alpha, knowing he would be the perfect mate. Somehow, his instincts knew that Professor Sukuna would take care of him very well, that Satoru would be completely safe with the alpha. His instincts also told him to present himself for the alpha, allow the alpha to breed his virgin cunt for the first time.
But Satoru couldn’t just do that.
Sukuna was a respectable alpha who probably already had an omega and would never go for an undergrad student.
Satoru sighed and exited the library, headed down the stone steps in the front, and through the main courtyard of the campus. As he passed the fountain in the center, a group of loud students laughed nearby, making him shrink back and quicken his pace.
He hated the noise, the chaotic energy of a crowd. He just wanted to get home before it got dark, immerse himself in his books, and perhaps make some ramen for dinner. However, as he stepped onto the sidewalk, he noticed a sleek, black sedan idling by the curb.
The windows were tinted, hiding whoever was inside, but something about the vehicle put him on edge. He began to walk past the car, but as he did, the window slid down with a soft, mechanical hum.
Inside sat a man in a charcoal suit, his expression stony and professional.
"Gojo-san," the man stated, his voice devoid of emotion. "Professor Sukuna has requested that you accompany me to his residence this evening. He mentioned that your recent performance suggests you require more... specialized guidance."
Satoru froze, his blue eyes widening. A private study session? At the professor's home? The idea sent a jolt of panic and excitement through him. He had never been invited to a professor's residence, let alone Sukuna's. Also, what was with Sukuna sending a vehicle like this? Satoru was under the impression that professors didn't make nearly enough money to afford something so… Luxurious.
"I... I don't think that's necessary, I can study on my own," Satoru stammered.
He felt a sudden surge of insecurity; perhaps he had looked too confused in the office, and the professor was simply taking pity on him. But as he began to step away, the man in the car spoke again, his tone slightly firmer.
"The Professor does not like to repeat his requests, Gojo-san."
Satoru stopped in his tracks, his heart hammering. The thought of disappointing Sukuna—or worse, appearing lazy or ungrateful—outweighed his shyness. With a hesitant, shaky breath, he stepped toward the vehicle.
"Okay. I'll go," he whispered, sliding into the plush leather interior.
The drive was a blur of shifting cityscapes and widening roads, the silence of the sedan mirroring the tension coiling in Satoru's gut. He spent the entire trip staring out the window, his mind racing through a dozen different scenarios.
Was this actually about the assignment, or had he inadvertently offended the man? Was Sukuna secretly a member of the mafia, and was now planning to kill him?
Okay, even Satoru had to admit that that train of thought was ridiculous.
The further they drove from the campus, the more the surroundings changed from bustling urban centers to secluded, gated communities where the trees grew tall, and the air somehow felt rich. Like, 'You know you don't belong here just by breathing the air,' kind of rich. Satoru felt smaller and smaller, a speck of white and blue being carried toward a destination that might eat him alive.
The sedan finally slowed, gliding through massive wrought-iron gates that opened with a slow groan, revealing a winding driveway lined with meticulously manicured hedges. At the end of the path sat a sprawling estate, a masterpiece of modern architecture and traditional Japanese influence, characterized by sharp lines, dark stone, and expansive glass walls that reflected the dying orange light of the sunset. Satoru gasped softly, his breath fogging the window.
Once they were parked, the driver stepped out and opened the door for Satoru, gesturing toward the entrance where a set of heavy oak doors stood slightly ajar.
"The Professor is expecting you in his study," the man said, his voice as flat as a board.
Satoru stepped out, feeling the sudden chill of the evening air against his cheeks. As he walked toward the massive house, he felt even more exposed and fragile.
The interior was a reflection of the man himself: austere, expensive, and meticulously organized. Satoru followed a designated hallway that a passing servant had pointed him towards, his eyes wandering over minimalist art and dark wood paneling, until he reached a room that smelled strongly of cedar and expensive tobacco.
The study was vast, lined from floor to ceiling with shelves carrying books of all sizes and various knick-knacks, lit by the warm, amber glow of a few strategically placed lamps and a fireplace on the far wall. Sukuna was there, standing by a wide mahogany desk where a collection of rare texts and a single, perfectly placed lamp awaited. He had traded his professional suit from earlier for a pair of charcoal slacks paired with a dark button-up that was only partially done, leaving his chest partially exposed and revealing the dark ink of his tattoos.
"You're late," Sukuna remarked. He didn't look up from the document he was reading, but the sheer presence of him in the room seemed to shrink the space around Satoru.
The omega stood frozen by the door, clutching the strap of his bag, feeling an overwhelming sense of displacement. This wasn't a classroom; there were no other students to hide behind, no bell to signal the end of the period. He was alone with the alpha.
"I... the driver... he took the long route," Satoru whispered, his voice trembling as he stepped further into the room.
Sukuna finally shifted, turning his head to look at the boy. His crimson eyes swept over Satoru, taking in the way the omega seemed to shrink into his own clothes, his expression a mixture of awe and terror. The sight sparked that possessive heat in Sukuna's gut once more.
"Sit," he commanded, gesturing toward the mahogany table.
Satoru obeyed, sliding into the heavy velvet chair. He felt dwarfed by the furniture and the man standing beside him. He carefully placed his notebook on the table, his fingers trembling so much that the pen rattled against the wood.
"The... the materials, Professor," Satoru murmured, glancing at the rare texts Sukuna had on the desk.
He realized with a start that they weren't textbooks from the university curriculum; they were obscure works centered on ancient philosophy and advanced linguistics, subjects that were far beyond the scope of his current assignment.
"These aren't for the essay," he noted softly, his intellectual curiosity momentarily overriding his nervousness.
Sukuna didn't move to open any of the books. He simply stood there and crossed his arms over his chest, the tattoos on his skin seeming to pulse in the amber light.
"They aren't," he agreed, leaning against his desk. "The academic portion of your visit can wait. There is something else I wish to speak to you about first, Satoru."
