Chapter 12: The Fourth Round
The new clothes, folded neatly in the paper bag on Donghae’s floor, were an accusation and a promise. Hyukjae stared at them from the bed, curled under the mountain of comforters. The whiskey bottle on the nightstand was still half-full. She’d taken one sip earlier, the burn doing nothing to drown out the memory of the fitting room mirror. You look like you. You just look… comfortable. Donghae’s words were a lifeline she was terrified to pull on, because what if it led her further from the shore?
He was in the shower. The sound of the water was a steady hiss behind the closed bathroom door. The evening had been quiet, strained with a new kind of tension. Not the desperate panic of the lab, or the furious need of the couch. This was a heavy, waiting silence. They’d eaten takeout without tasting it. The television had been a flickering blue light, ignored.
The water shut off. Hyukjae’s heart did a clumsy, hopeful stumble in her chest. She hated it, this new body’s autonomic reactions. The way it warmed at the thought of him. The way it remembered the feel of him, inside. She shoved the thought down. That was the trigger. The reset button. The thought carried a new, insidious weight now. What if Donghae was right? What if it was about more than just the physical act? What if the permanence Heechul warned of wasn't just a cellular fact, but an emotional one?
The bathroom door opened. Steam rolled out, carrying the clean, sharp scent of his soap. Donghae emerged in a pair of low-slung grey sweatpants, his hair dark and dripping onto his bare shoulders. Water droplets traced paths down the taut planes of his chest and stomach. He used a small towel to scrub at his hair, his movements economical. His eyes found hers in the dim lamplight.
“You’re thinking too loud,” he said, his voice still a little rough from the steam.
“What if it’s not just sex?” The question blurted out, raw and unvarnished.
He stopped drying his hair. The towel hung in his hands. “What do you mean?”
“Heechul said ‘bonding events.’ He said ‘a specific pheromonal signature.’ Not just any male partner. What if… what if it’s you?Specifically. What if my body, this fucked-up matrix, is latching onto you as the… the definitive variable?” She sat up, the comforter pooling around her waist. She wore one of his old t-shirts, swallowed by it. “What if every time we do it, it’s not a random reset? What if it’s the matrix saying, ‘This one. This is the compatible form for this one.’ And it’s reinforcing it. Making it stick.”
Donghae was very still. He dropped the towel on the back of his desk chair. The implications hung in the air, thicker than the steam.
“You’re saying I’m making you… stay like this.” It wasn’t a question. He walked to the bed and sat on the edge, his weight causing the mattress to dip toward him. He didn’t touch her.
“I don’t know. I’m saying maybe it’s not the fucking that does it. Maybe it’s the fucking with you.” She let out a shaky breath. “We fucked three times. Once this morning on the floor. Twice on the couch. That last time… I came so hard I saw stars. You came inside me. But I didn’t change back.”
She watched the memory replay in his eyes. The raw, almost brutal claiming on the couch. The way he’d held her afterward, in the shower.The tenderness.
“You changed after,” he said quietly. “While we were holding each other. Not during.”
They sat in silence, the theory coalescing between them, ugly and plausible. A bonding event. Not just climax, but the intimacy that surrounded it. The closeness. The emotional exchange.
“So what’s the protocol?” Donghae asked, his voice flat. “Do we stop? Do I not touch you?”
The idea was a physical pain, a cold blade sliding between her ribs. “I don’t know,” she whispered.
He turned to look at her fully, his eyes dark pools in the lamplight. “Do you want me to stop?”
Her answer was immediate, a visceral revolt from her very core. “No.”
Something loosened in his posture. A tension she hadn’t fully registered bled out of his shoulders. He reached out, his fingers brushing a stray strand of hair from her cheek. The touch was electric. “Then we don’t stop. We test a different theory.”
“Which is?”
“That you’re not just compatible with me. You are mine. And this…” His hand cupped her cheek, his thumb stroking her jawline. “…is the form that belongs to me. Maybe the matrix isn’t broken. Maybe it’s finally fucking correct.”
Her breath hitched. The words were possessive, archaic, insane. And they shot a bolt of pure, undiluted heat straight to her core. It pooled there, heavy and urgent.
“That’s a dangerous theory,” she breathed, leaning into his touch.
“It’s the only one that lets me breathe,” he confessed, his thumb moving to trace her lower lip. “The thought of you with anyone else… the rugby team, some other guy, as some fucking control… it makes me want to break the world.”
His honesty was a narcotic. She shifted, moving to straddle his lap, facing him. The old t-shirt rode up her thighs. His hands came to rest on her hips, a natural, anchoring weight. She could feel the hard line of his erection through the thin sweatpants, pressing against the heat of her, even through her own underwear.
“So we test it,” she said, her voice dropping to a murmur. She rolled her hips, a slow, deliberate grind against him. He sucked in a sharp breath, his fingers digging into her flesh. “We see how convincing you can be.”
She leaned forward, capturing his mouth with hers. This kiss was different. It wasn’t frantic or furious. It was deep, searching, and unbearably sweet. It was a conversation. A confirmation. His lips parted for her, his tongue meeting hers in a slow, wet dance. One of his hands slid from her hip up her back, under the t-shirt. His palm was hot, calloused, sliding over the smooth skin of her spine. It made her shiver.
She broke the kiss, breathing heavily. Her fingers went to the waistband of his sweatpants, tugging. He lifted his hips, helping her push them down just enough to free his cock. It sprang free, thick and already fully hard, the head gleaming in the low light. She reached between her own legs, hooking her thumbs into the sides of her panties—plain cotton, from the new packet—and pushed them down, wriggling out of them without breaking contact.
Then she positioned herself. She took him in hand, guiding him to her entrance. She was already slick, wet for him, her body’s own traitorous, eager betrayal. She met his eyes as she lowered herself, inch by agonizing inch.
“Fuck,” Donghae groaned, his head falling back, his neck corded with strain.
She took him all, until she was fully seated, her thighs trembling with the stretch, the incredible fullness. She paused, letting them both feel it. The perfect, tight fit. Then she began to move.
This wasn’t a frantic ride. It was a slow, torturous grind. She rose up, almost letting him slip free, then sank back down, her muscles clenching around him. She set a deliberate, rocking rhythm, her hips circling as she took him deep. Every nerve ending was alive. The scrape of his pubic hair against her clit. The hard, insistent pressure inside her, touching a place that made her vision shimmer. The way his hands gripped her ass, guiding her, encouraging her.
“Look at you,” he breathed, his eyes clouded with lust and something far deeper. “Taking me so fucking good. My perfect girl.”
The words, the filthy endearment, unlocked something in her. A flood of warmth, of shocking, possessive pleasure. She moaned, throwing her head back, her breasts pushing against the thin cotton of the t-shirt. He leaned forward, catching a peaked nipple through the fabric in his mouth, sucking hard. The dual sensation—his hot mouth, his cock buried to the hilt—drove a sharp cry from her throat.
She rode him harder, losing the slow pace, chasing the coiled, tightening feeling in her belly. The bedsprings creaked a steady, rhythmic protest. The air filled with the wet, slick sounds of their joining, their ragged breaths, the soft, filthy whispers he muttered against her skin.
“That’s it, baby. Squeeze my cock. Milk me with that tight little cunt.”
She was close, so close. The pressure built, a relentless, rising wave. He sensed it. One hand slid from her ass, his fingers finding the slick, swollen bundle of nerves above where they were joined. He pressed, circling with practiced precision.
It detonated her.
Her orgasm ripped through her with silent, breathless intensity. Her entire body seized, her cunt clamping down around him in rhythmic, vise-like pulses. A high, keening sound escaped her as she ground down against him, milking him, her inner muscles fluttering wildly.
The sensation was too much for him. With a choked groan, he gripped her hips and thrust up into her, hard and deep, once, twice, three times as she spasmed around him. She felt the hot, sudden rush of his release flooding her core, a profound, intimate warmth that seemed to seal them together.
They collapsed backward onto the bed in a tangled heap, him still inside her, her body a boneless weight atop his. Sweat glued her t-shirt to her back. His heart hammered against her chest. They lay there, breathing in ragged unison, as the aftershocks slowly faded.
Slowly, carefully, he shifted them onto their sides, still connected. He held her close, his face buried in her hair. The intimacy was absolute. Complete. The kind of closeness that came after words, after fights, after shared, devastating truths.
They drifted like that for a long time, in the warm, wet silence. Hyukjae waited. She monitored the landscape of her own body, searching for that tell-tale warmth, that cellular sigh. She listened for the whisper of change.
It didn’t come.
The warmth in her core was just the fading heat of sex, the afterglow. Her limbs remained as they were. The weight on his arm was still the lighter, softer weight of her.
An hour passed. Donghae had softened and slipped from her, but he hadn’t let go. He’d just pulled the comforter over them both. They dozed, a fitful, exhausted sleep.
Hyukjae woke first. The room was pitch black, the desk lamp off. Donghae was a solid, sleeping warmth behind her, his arm slung heavily over her waist. She carefully extracted herself, slipping out of bed. She padded, naked, to the small bathroom.
She didn’t turn on the overhead light. She used the faint green glow from the nightlight plugged into the socket. She stood before the mirror, staring at the pale, ghostly reflection.Nothing.
Her face, the same feminine curves. Her body, unchanged. Three rounds. The third had been the most intense, the most connected. And yet, the transformation hadn’t triggered.
He stirred in the bedroom, the bed creaking. “Hyukkie?” His voice was sleep-rough.
She walked back to the bedroom doorway, silhouetted by the faint bathroom light. “I’m still here,” she said softly.
He sat up on his elbows. In the darkness, she could see the gleam of his eyes. “Okay.”
“Is it?” she asked, the word barely audible.
He didn’t answer with words. He threw back the comforter and held out a hand to her.An invitation. A question.
She walked back to the bed and took his hand. He pulled her down, but not to lie beside him. He guided her onto her back, settling between her thighs with a fluid, purposeful grace that stole her breath. He was already hard again, his cock nudging insistently at her entrance. She was still wet, still open from him.
“What are you doing?” she whispered.
He leaned down, his lips a hair’s breadth from hers. His expression was fierce, focused. “I’m convincing you,” he murmured, his voice a dark, delicious promise. “Looks like I’ll have to convince you harder.”
Then he dipped his head, bypassing her mouth entirely. He kissed a hot trail down her sternum, over her stomach, lower. He hooked her legs over his shoulders, his breath a warm ghost against the most intimate part of her.
She knew what was coming, and a jolt of pure, wild anticipation shot through her. “Donghae…”
He didn’t answer. He simply lowered his mouth to her.
The first touch of his tongue was a lightning strike. A flat, wet, relentless lick from her opening all the way up to her clit. She cried out, her back arching off the bed. He groaned against her, the vibration shooting straight to her core. And then he began to feast.
This was different from anything before. It wasn’t a prelude. It was the main event. An act of pure, worshipful carnality. He used his tongue like a weapon of pleasure, licking, circling, flicking with maddening precision. He sealed his mouth over her clit and sucked, hard, and stars exploded behind her eyelids. He speared his tongue inside her, fucking her with it, tasting her, devouring her.
“Oh, god, right there, don’t stop, please don’t stop,” she babbled, her fingers tangling in his hair, not pushing him away but holding him there, closer. Her hips moved of their own volition, grinding against his face, seeking more pressure, more friction, more of that devastating, wet heat.
He growled, the sound vibrating through her, and doubled his efforts. One hand came up to press against her lower belly, holding her down as he worked her over. The other hand slid down, two fingers slipping easily inside her soaked, clenching passage, crooking to find that spot that made her scream.
He worked her with his mouth and fingers in a brutal, perfect sync. Licking, sucking, fucking her with his fingers, crooking them just so. The coiling tension in her belly was immediate, unbearable, a spring wound too tight. He felt it, and his tongue focused on her clit, flicking rapid-fire, as his fingers pumped inside her.
“I’m gonna come, I’m gonna—fuck—” she choked out.
He sucked her clit into his mouth and pressed the heel of his hand hard against her as his fingers thrust.
Her orgasm wasn’t a wave. It was a shattering. A convulsive, body-breaking eruption that tore a raw, ragged scream from her throat. Her legs shook violently around his head. She felt herself gushing around his fingers, a hot, wet release, and he drank it down, his groans of satisfaction mixing with her cries.
He didn’t let up. He gentled his mouth but kept licking, softly, through the violent aftershocks, until she was a trembling, sobbing mess, sensitive to the point of pain. Only then did he slowly, reverently, kiss his way back up her body.
He was rock-hard, his cock weeping against her thigh. His mouth was glistening, his chin wet. He looked feral, triumphant, and so deeply in love it hurt to see.
“Convinced?” he breathed, his voice wrecked.
In answer, she wrapped her shaking legs around his waist and pulled him down, guiding him into her with a desperate, needy sound. He sank into her wet, welcoming heat in one smooth, deep stroke. She was so sensitive, so overstimulated, that the fullness was almost too much, a delicious, unbearable stretch.
He didn’t move. He braced himself above her, looking down into her eyes. “Mine,” he stated, the word final, absolute.
Then he began to fuck her. A deep, slow, powerful rhythm that had none of the earlier frenzy. This was a claiming, a seal. Each thrust was deliberate, bottoming out inside her, his pelvis grinding against her tender flesh. She could only take it, her body still vibrating from the cataclysm he’d wrought with his mouth, her cunt fluttering around him with each deep drive.
It didn’t take long. The sight of her beneath him, ravished, utterly his, the feel of her clenched tight around him, was too much. His rhythm fractured. His thrusts became shorter, harder, desperate.
“Come with me,” he gritted out, his control splintering. “Come on my cock, baby. Now.”
As if commanded, a second, smaller orgasm trembled through her, triggered by the sheer force of his possession, the feel of him pounding into her so deep it touched her soul. She gasped, her walls fluttering wildly.
He shouted her name—her real name, the old one, a shattered prayer—as he drove into her one last, brutal time and emptied himself. She felt every pulse, hot and deep, a final, physical brand.
He collapsed, his full weight on her for a moment before rolling to the side, taking her with him, keeping them connected. They were both slick with sweat, trembling. The room smelled of sex, salt, and them.
He held her like that, inside her, for what felt like an eternity. His breathing slowly evened. Hers did too. She waited, dreading and yearning for the change.
It didn’t come.
The warmth that bloomed within her wasn’t transformation. It was something else. A deep, settling certainty. A terrifying, quiet peace.
She was still herself. She was still her. And she was, undeniably, his. The matrix, it seemed, had made its final, unbreakable decision.
The matrix, it seemed, had made its final, unbreakable decision.
She woke to grey dawn light bleeding through the blinds. Donghae’s arm was a dead weight across her stomach, his breathing deep and even against the back of her neck. For the first time in weeks, there was no internal whisper of change upon waking. Her body felt settled. A permanent resident in its own unfamiliar skin. The silence inside her was louder than any transformation.
She needed air.
Carefully, she slid from beneath his arm, the cool morning air raising goosebumps on her bare skin. She pulled on the new jeans and the grey t-shirt from the paper bag, the movements quiet and automatic. The fabric felt alien but correct, like breaking in a stiff new pair of shoes. She slipped out of the apartment, the door clicking shut with a sound like a full stop.
The world at dawn was different. Softer. The streets were empty, washed clean by the night. She walked without direction, her hands shoved deep in the pockets of a borrowed jacket. Her mind was a blank, static screen. The frantic theorizing from last night—the bonding events, the pheromonal signatures—felt like someone else’s desperate fiction. The reality was simpler now. She was this. The experiment had achieved a terrible, stable success.
She stopped walking. She was standing outside the Applied Bio-Sciences building. Her feet had carried her back to the source. The steel doors, with their etched warnings, stared back.
A wild, reckless calm descended on her.No more running. No more waiting for Heechul’s weekly deadline. She marched inside, her sneakers squeaking on the polished linoleum of the empty corridor. The elevator smelled of stale disinfectant. She rode it to the fourth floor alone.
The lab door was unlocked.
Heechul was already there, a spectral figure in the sterile glow of a single microscope light. He wore the same black silk shirt, now rumpled, as if he’d never left. He looked up as she entered, his face a mask of unsurprised expectation. The bruise on his jaw from Donghae’s fist was a lurid purple-yellow.
“Punctual,” he said, his voice raspy from lack of sleep. “I expected Donghae’s righteous fury to accompany you.”
“He’s sleeping.” Her own voice sounded flat, distant. “It didn’t work.The reversal. It’s stable. I haven’t changed back since yesterday morning. Not even a flicker.”
Heechul leaned back in his chair, the wheels squeaking. He steepled his fingers. “The bonding variable hypothesis. You tested it rather… vigorously, from the sound of things. And it held.”
“So that’s it?” A spark of the old anger, the old Hyukjae, flared in her chest. “I’m just stuck? Your little project is complete? Congrats, Professor. You made a man into a woman who can’t turn back. What’s the fucking thesis title?”
“The thesis,” Heechul said slowly, his pale eyes scanning her up and down with clinical precision, “may have additional, unforeseen data points. Have you experienced any new symptoms? Beyond the morphological stability?”
She almost laughed. “What, like growing a tail? Sudden cravings for fucking pickles?”
“Nausea.Fatigue. Breast tenderness. A missed menstrual cycle, though given your unique origin point, that particular metric is admittedly fascinating to calibrate.” His gaze was unwavering, pinpoint sharp.
The words landed like physical blows. Nausea. She’d thrown up yesterday morning, blaming it on stress. The crushing fatigue that sleep didn’t touch. Her breasts had been sore, sensitive to the point of pain under Donghae’s mouth and hands. She’d attributed it all to the trauma, the chaos, the relentless physical and emotional upheaval.
A cold, impossible understanding began to crackle at the edges of her static mind.
“No,” she whispered.
“You’ve been engaging in unprotected sexual intercourse repeatedly with a virile male,” Heechul stated, his tone shifting from clinical to faintly, insanely amused. “Quite enthusiastically, from the biological evidence I’d hypothesize. Did the concept of consequences truly not cross either of your romantically fevered brains?”
“I was a man two weeks ago!” The shout echoed off the glass and steel.
“And now you are a reproductively viable female with a perfectly functioning uterus and ovaries, courtesy of my catalytic agent!” he shot back, standing up, his own composure fracturing. “The matrix didn’t just change your surface, you idiot. It built the entire system. Down to the last working part. Did you think it was for decoration?”
The world tilted. She gripped the edge of a steel lab table, the metal cold and unyielding under her fingers. The sterile smell of the lab suddenly made her stomach lurch.
“You didn’t use protection?” Heechul continued, a derisive snort escaping him. “Raw sex? Every time? I thought Donghae would be smarter. All those books, and no basic biology? If you release so many times inside a woman, this is statistically bound to happen. It’s not alchemy. It’s fucking elementary.”
The crude, clinical truth of it hammered into her. Donghae. His inexperience. His only sexual experience was with her, in this body. His virginity, surrendered to her in a storm of confusion and need. He wouldn’t have thought of it. He’d been too consumed by her, by them, by the desperate act of claiming and being claimed. The condoms by his bed had been unused, forgotten.
And she… she had been too busy grappling with her very existence to consider its potential.
“I need a test,” she heard herself say, the voice belonging to someone else. “Right now.”
Heechul studied her for a long moment, the amusement fading from his eyes, replaced by something colder: pure scientific zeal. “Follow me.”
He led her not to the main lab, but through a side door to a smaller, even colder examination room. It held an ultrasound machine, a clinical cot, and cabinets of supplies. He tossed a thin, paper gown onto the cot. “Put this on. Lie down.”
Her hands were numb. She changed behind a flimsy screen, the paper crinkling like dry leaves. She lay back on the stiff paper sheet, staring at the acoustic tiles of the ceiling. A small, dark part of her hoped he was wrong. That this was another one of his cruel psychological tests.
Heechul prepped the machine with efficient, detached movements. He squeezed cold, clear gel onto her lower abdomen. The transducer probe was colder. He pressed it firmly into her flesh, his eyes fixed on the monitor.
The grainy, black-and-white image flickered to life.Static and shadow. Heechul moved the probe, angling it. His breath hitched, just slightly.
He pointed a pale finger at the screen.
There, in the centre of the swirling grey static, was a small, blurry, bean-shaped shadow. And within it, a tiny, frantic, flickering pulse. A heartbeat. Separate from her own.
Time stopped. Sound drained from the room. She could only see that flicker, that impossibly rapid, rhythmic blink on the screen. A new matrix. A consequence made flesh.
Heechul saved an image, the printer whirring to life. He wiped the gel from her stomach with a rough paper towel, his movements now mechanical. He handed her the grainy printout without meeting her eyes.
“Approximately five weeks. Congruent with the initial transformation event.” His voice was flat, all mockery gone. “The stabilizing factor wasn’t purely emotional or pheromonal. It was hormonal. A biological lock. The body prioritizes the gestation. It will not risk a reversion now. The experiment… is unequivocally over.”
She sat up, the paper gown rustling. She took the printout. The image trembled in her hand. That tiny bean. That flicker.
She dressed in a silence thicker than any she’d ever known. Heechul said nothing more, already turning back to his microscope, dismissing her.A concluded study.
The walk back to Donghae’s apartment was a dream. The sun was fully up now, the city loud and bright and obscene. She climbed the stairs, each step a monumental effort. She opened the door.
Donghae was awake, pacing by the window. He turned, his face taut with worry that melted into relief when he saw her. He crossed the room in two strides.
“Where did you go? I woke up and you were just… gone.” He cupped her face, his thumbs stroking her cheeks. “You’re ice cold.”
She looked up into his eyes, those deep, kind pools of warmth that had been her only constant. She saw the love there, pure and unguarded. The fear of her disappearance. The happiness that she was back.
She held out the crumpled ultrasound image.
He took it, his brow furrowing in confusion. He looked down at the black and white grainy shapes. She watched his face. She saw the moment his mind, so quick with books and stories and the hidden meanings of things, deciphered the clinical truth.
His breath caught. His eyes widened, shot to her stomach, then back to the image. The flickering heartbeat.
The confusion in his eyes didn’t turn to horror. It didn’t curdle into disgust or panic. It softened. It melted into a dawning, staggering, impossible wonder. A slow, tremulous smile touched his lips, fragile and utterly sincere.
He wasn’t horrified. He was happy.
“Hyukkie…” His voice was a breathless, awed whisper. He dropped the paper and pulled her into him, his arms wrapping around her with a crushing, reverent strength. He buried his face in her hair, and she felt his shoulders shake. Not with sobs, but with a disbelieving, joyous laughter.
He pulled back, framing her face again, his eyes shining with tears. “We did this,” he said, a laugh still bubbling in his throat. “This is ours.”
He kissed her, and his kiss tasted of salt and sunlight and a fierce, uncomplicated joy. It was the answer to every twisted question, the endpoint of every chaotic variable. It was the most terrifying and the most real thing she had ever felt.
Her hands came up to clutch at his wrists, her own tears finally breaking free, hot and silent. In the warmth of his impossible happiness, the static in her mind finally resolved into a single, deafening sound: the echo of that tiny, flickering pulse.