Cover of The Gender Swapped Drug Trial

The Gender Swapped Drug Trial

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Ryan and his girlfriend Mia have enrolled in a drug trial program for a large sum of money. They are unaware that the drug will change their genders for a week. They are given the drug by lead scientist Lindsay. Mia transforms into a good looking muscular man with a 8 inch cock. Ryan transforms into a gorgeous athletic long haired blonde with blue eyes, small breasts, and a bald pussy. The scientist runs some tests and makes them masturbate in front of her to ensure everything is working properly. Ryan and Mia have loud orgasms. Lindsay tells them there may be side effects from the drug. She also tells them to not let anyone know their true identity for the week and hands them new identities. Mia will now be Liam and Ryan will now be Emma.

Chapter 1: The First Morning as Emma

Cold bit into his back. The surface was hard, unyielding. Ryan blinked, his vision swimming into focus under a ceiling of stark blue lights. A dull, unfamiliar ache pulsed in his chest. He moved to sit up, and a wave of dizziness washed over him, along with a sensation of… weight. A gentle, foreign weight on his forefront.

He looked down.

The thin, papery gown was tented by two soft mounds. His hands, trembling, came up to touch them. Through the material, he felt the firm, rounded shape, the peaked nipple that tightened at his own touch. A jolt, electric and strange, shot down his spine.

“What the fuck,” he whispered. His voice. It was higher. Softer. A stranger’s breath in his throat.

He shoved the gown down, his hands scrambling over his own torso. The flat, hard plane of his stomach was gone, replaced by a subtle, smooth curve. His fingers dug into his hips, which felt wider, his waist cinching inwards. He tore at the tie of the gown, yanking it open.

He wasn’t naked. A simple white sports bra restrained the new weight on his chest. His hands fumbled with the clasp in the front, panic making his new fingers clumsy. It sprang open.

Ryan stared. Two small, perfect breasts lay against his chest. The skin was pale, the nipples a soft pink. They rose and fell with his ragged breath.

He swung his legs over the side of the table. The movement felt different, the balance off. His thighs brushed together, smoother than they had ever been. He looked between his legs.

His cock was gone.

In its place, a neat, hairless slit. Completely bare. The skin was flawless, pale and vulnerable-looking. A cunt. He had a cunt.

His heart hammered against his new ribs. A high, thin sound of pure terror escaped his lips. He stumbled off the table, his legs—longer, sleeker—nearly buckling. He caught himself on a counter, and his eyes lifted to the full-length mirror lining the wall.

A blonde woman stared back, wide-eyed with panic.

Long, honey-gold hair fell over bare shoulders. Striking blue eyes, framed by dark lashes he’d never had, were blown wide with shock. Her—his—lips, fuller than before, were parted. The face was delicate, heart-shaped, utterly beautiful and utterly alien.

“No,” the woman in the mirror mouthed. “No, no, no.”

His hand, slender with neatly trimmed nails, rose to touch the reflection. The reflection mimicked him. He brought his other hand down, fingers skimming over the flat plane of his stomach, through the fine, nearly invisible blonde down, and into the baffling, hairless cleft between his legs. The skin was impossibly soft. He probed, and his finger slipped into a wet, tight heat that made his knees weaken. A choked gasp echoed in the room—his gasp, her gasp.

The door hissed open.

“Ah. You’re awake. Good.”

Dr. Lindsay Vance stood in the doorway, a tablet in hand. She was sharp in a white lab coat, her short blonde hair sleek, her green eyes missing nothing. She looked from Ryan to the mirror, a faint, satisfied smile touching her lips. “The physical congruency is exceptional. How do you feel, Emma?”

“That’s not my name,” Ryan said, his new voice trembling.

“It is now,” Dr. Vance said, stepping fully into the room. The door sealed shut behind her. “For the duration of the trial, at least. Ryan is currently… undergoing restructuring. You are Emma. Say it.”

He—she—swallowed. “Emma.” The name felt like ash.

“Good. Now, the initial disorientation is normal. The drug, Nex-Gen Morph, has successfully rewritten your sexual phenotype at a cellular level. You are, for all biological and aesthetic purposes, female. A very attractive one, if I may say so. The athletic baseline physique was preserved nicely.”

Dr. Vance circled her, a predator evaluating a specimen. “The hairlessness is a side-effect of the rapid follicle apoptosis. It should grow back, eventually. In the meantime, it provides an unobstructed view.” She stopped behind Emma, meeting her eyes in the mirror. “The aching in your mammary tissue is also normal. They’re still calibrating to the new hormonal influx.”

“Why?” Emma managed to ask, tearing her eyes from the doctor’s reflected gaze to look at her own unfamiliar face. “Why did you do this?”

“Science, Emma. The next frontier isn’t space. It’s the self. Now,” she said, her tone shifting to one of clinical instruction, “we need to confirm full neural and pleasure-pathway integration. The body is one thing. The brain’s acceptance of it is another. I need you to stimulate yourself to orgasm.”

Emma’s head whipped around. “What?”

“You heard me. Masturbate. Here. Now. I need to observe the physiological responses, ensure everything is… wired correctly.” Dr. Vance leaned back against a steel console, tapping her tablet. Her gaze was cool, expectant. “This is a critical data point.”

“Fuck you. I’m not doing that.”

“Then you’ll remain here, in this lab, until you do. Or until I have to administer a stimulant and record the results passively. Trust me, the latter is less dignified.” Dr. Vance’s eyes hardened. “This is not a request. It is a protocol. Your partner is in the adjacent room undergoing the same evaluation.”

“Mia?” The name was a lifeline.

“Liam,” Dr. Vance corrected. “He is adapting to his new male physiology. Now, proceed. The clock is ticking, and my patience, while considerable, is not infinite.”

A hot shame washed over Emma. She turned back to the mirror, staring at the stranger she housed. Her hands were trembling violently. This wasn’t happening. This was a sick dream.

“Touch your breast,” Dr. Vance instructed, her voice low and deliberate. “Start with what’s familiar, even in its new form.”

Emma’s hand, moving as if guided by strings, lifted. Her palm cupped the small, firm weight of her right breast. The skin was so sensitive. Her thumb brushed over the nipple, and it puckered tightly, a bolt of sensation spearing directly down to that new, secret place between her legs. She flinched.

“Good. Sensitivity is high. Continue.”

Swallowing a sob, Emma let her other hand trail down her stomach. The muscles quivered under her touch. She closed her eyes, trying to be Ryan, trying to be anywhere but here. But the sensations were here, and they were overwhelming. Her fingers reached the smooth, bare mound.

There was no coarse hair. Just slick, plump skin. Her middle finger traced the length of the slit. It was already wet. Slick heat greeted her exploration. A low, pathetic whimper escaped her lips.

“Open your eyes, Emma,” Dr. Vance commanded. “Watch the transformation. Own it.”

Emma forced her eyes open. In the mirror, a gorgeous blonde woman was touching herself, her face flushed with shame and something else—a dawning, helpless arousal. Her finger dipped inside, just to the first knuckle. The tight, clutching warmth was unimaginable. It felt… good. Devastatingly good.

“Deeper,” the doctor said, her own breath slightly audible now.

Emma pushed her finger in further. A soft, gasping moan echoed in the room. Her hips gave a tiny, involuntary jerk. Her other hand pinched and rolled her nipple, sending wild arcs of pleasure crackling through her nervous system. This wasn’t his body, but it was hers now, and it was lighting up like a fucking Christmas tree.

She added a second finger, stretching the delicious tightness. The sound was obscene, wet and intimate. Her thumb found a small, hard nub at the apex of her folds and pressed.

“Oh, god!” The cry was high and feminine, shattering the clinical silence.

Her back arched, her new breasts thrusting forward. She fucked herself with her fingers, fast and desperate now, chasing a peak that was building differently, deeper, wider than anything Ryan had ever known. The coil wound tight in her gut. Her legs shook. She was panting, little cries falling from her lips with each thrust.

“Observe the flush spreading from the chest to the throat,” Dr. Vance murmured, but her clinical tone was fraying, tinged with a husky note of fascination. “Perfect.”

Emma’s world narrowed to the mirror, to the sight of her own ecstasy, to the frantic friction of her fingers on her clit and inside her cunt. The pleasure was a tidal wave, rising from that wet core, drowning the shame, drowning the terror. It crested, and she came with a shattered scream, her body convulsing, her inner walls clamping rhythmically around her fingers. Waves of intense, prickling heat radiated out through her belly, her thighs, leaving her weak and shuddering.

She slumped, catching herself on the counter, breathing in ragged sobs. Her fingers slid out, glistening. The scent of her own arousal, musky and sweet, hung in the sterile air.

Dr. Vance let out a long, slow breath. She made a note on her tablet, her hand not entirely steady. “Full somatic and erotic integration confirmed.” She cleared her throat. “You can clean yourself at the sink. There are wipes.”

Emma moved on watery legs, avoiding her own gaze in the mirror. She cleaned up, the aftermath a blur of trembling limbs and profound dislocation.

“The drug is a success,” Dr. Vance said, having regained her composure. “You will both be released into a controlled environment for one week. To live your new identities, to gather data on psychosocial adjustment. There will be rules. You cannot reveal the nature of the trial. You will use your new names. You will share a residence we provide.”

“What side effects?” Emma asked, her voice hollow.

Dr. Vance’s smile was thin. “The unforeseen ones are what we’re looking for. Emotional lability. Residual genetic memory. Cravings. We don’t know. That’s the point of this phase.” She walked to the door. “Get dressed. The clothes are in the cabinet. We’ll reunite you with Liam shortly. Your old life is on pause, Emma. See what this one feels like.”The door hissed shut, leaving Emma alone with the stranger in the mirror, her body still thrumming with the aftershocks of an alien pleasure, the first chapter of a new existence already written in the slickness between her legs.t what they should do.

The clothes in the cabinet were simple, unisex. Black sweatpants, a gray hoodie, plain white underwear, and a sports bra. Emma—Ryan, he tried to insist in his mind—dressed mechanically. The soft fabric of the bra was a constant, confining reminder. The sweatpants hung low on his new hips. He kept his eyes down, avoiding the mirror, as a silent guard escorted him to a small, bright room.

Mia was already there.

Or rather, Liam was.

He sat slumped in a chair, a broad-shouldered stranger with close-cropped brown hair and a strong jaw shadowed with stubble. He was wearing similar sweats, but they bulged differently. His hands, large and veined now, were clenched on the table. He looked up as Emma entered.

His eyes were Mia’s. That was the only anchor.

“Ryan?” Liam’s voice was a deep, resonant rumble, completely unfamiliar.

Hearing his old name in that voice shattered something. Emma just nodded, pulling out a chair, feeling the weird, light sway of hair against his back.

Dr. Vance entered, her heels clicking on the polished floor. She placed two plain manila folders on the table. “Emma. Liam. This is who you will be for the next week.” She opened the folders, revealing driver’s licenses, credit cards, and brief bios. “Emma Reed. Liam Cole. You are new transplants to the city, here on a week-long exploratory visit. There is a fully furnished apartment with clothes for each of you just down the block. You are not to tell anyone who you truly are. You will act as your new persons and integrate fully into society. Go out. Make friends. Have fun. Think of this as an all-inclusive vacation.”

Liam picked up his license, staring at the picture of the stern-looking man. “A vacation.”

“Next week,” Dr. Vance continued, ignoring his tone, “you will report back here to receive the antidote. The reversal process is theorized to be straightforward. Your compliance this week ensures its success.” Her green eyes pinned each of them. “Any questions?”

Emma found his voice. “What if we… can’t do it?”

“Then the week resets,” she said flatly. “And we begin again. I suggest you embrace the curiosity. It will make the data richer and your time less… psychologically strenuous.”

She left them with the folders and a keycard.

The walk to the apartment was a blur of sideways glances and staggering reality. They didn’t speak until they were inside the sleek, anonymous sedan provided for them.

“She made me… touch myself,” Liam blurted out, his large hands gripping the wheel. “She watched. Took notes.”

“Yeah,” Emma whispered, staring out the window at the passing city. “Me too.”

“Did you…?”

“Yeah.”

“Fuck.” Liam breathed the word like a prayer. “It felt… different. So fucking intense. I came so hard I saw stars. It was…”

“Terrifying,” Emma finished.

“Yeah.”

The apartment was a stylish, empty box in a modern building. Neutral walls, expensive but impersonal furniture. Two bedrooms. Two closets full of clothes—dresses and blouses for Emma, jeans and polos for Liam. The silence was deafening.

Liam finally turned from inspecting the liquor cabinet. “We can’t just sit here.”

“What do you want to do?” Emma asked, his voice small.

“Look.” Liam’s Mia-eyes were fierce, curious. “We have to look. Really look. At what they did to us.” He started pulling his shirt over his head. The movement was clumsily powerful. His chest was broad, sprinkled with dark hair, his pectorals defined. He shoved the sweatpants down.

Emma turned away, a hot flush climbing his neck. “Jesus, Mia.”

“It’s Liam. And stop being a prude. You saw me naked a thousand times.”

“That was different! This is… it feels wrong.”

“Why? Because I’ve got a dick now?” He stepped closer, completely naked. And he did. A thick, circumcised cock hung heavily between muscular thighs. It was already half-hard, just from the adrenaline, the taboo of it all. “It’s still me in here. Come on, Ryan. Emma. Whatever. Show me.”

The logic was insane but irresistible. Hands trembling, Emma pulled the hoodie over his head, undid the bra. His small breasts fell free. He pushed the sweatpants and underwear down, stepping out of them, standing naked in the cool air of the apartment.

Liam stared. His gaze was a physical thing, traveling over Emma’s slim form, the gentle curves, the hairless cleft. “Holy shit,” he breathed. “You’re so… pretty.”

“Don’t,” Emma said, but the word had no force.

Liam closed the distance. His big hands came up, but hovered, not touching. “Can I?”

This was gay. This had to be gay. But the person asking had Mia’s eyes, Mia’s soul. And his own new body was humming, that slick, ready feeling returning. He gave a tiny, jerky nod.

Liam’s touch was surprisingly gentle. One calloused thumb brushed over Emma’s nipple, and he gasped. The other hand slid down his stomach, lower, until his fingers were combing through non-existent hair, tracing the outer lips. Emma’s legs wobbled.

“She made me do it like this,” Liam murmured, his voice rough. He pressed a finger inside, slowly. Emma cried out, his head falling back. “She said to find the rhythm you like.” He began to move his finger, curling it slightly, his other hand pinching and rolling Emma’s nipple. It was clinical and intimate all at once, a lesson from one body to another.

Pleasure, white-hot and efficient, built rapidly. It was different from being alone in the lab. This was shared, witnessed by the only person who could possibly understand. Emma’s hips began to move against Liam’s hand, fucking himself on that invading finger. A second finger joined, stretching him beautifully. “There, right there,” Emma panted, guiding him, lost in the sensation.

He came with a sharp, gasping shudder, his cunt clenching tightly around Liam’s fingers. He sagged against the solid wall of Liam’s new chest, breathing hard.

After a moment, Liam extracted his wet fingers. He looked at them, then at Emma. “My turn.”

The old resistance surged back. “I don’t know how. I don’t want to… it’s weird.”

“It’s not weird. It’s me.” Liam’s new face was set with Mia’s stubbornness. “You think I wanted to finger a pussy for the first time? I did it. Now you do this.”

“Fine,” Emma said, the word tight. “But you have to… you have to eat your own cum. If you cum. I’m not having that shit anywhere near me.”

A wild, strange light came into Liam’s eyes. A challenge. “Deal.”

He lay back on the plush area rug, his cock fully hard now, standing up against his stomach. Emma knelt beside him, hesitating. He reached out, his slender female hand looking absurd as he wrapped it around the base. The skin was hot, silky. He gave an experimental stroke.

Liam groaned, his hips lifting. “Tighter. Use your thumb on the head.”

Emma did, copying what he remembered liking. It was surreal, jerking off his girlfriend who was now a man with a substantial, leaking dick. Pre-cum beaded at the slit. The room filled with the sound of skin on skin, of Liam’s ragged breathing.

“Faster,” Liam gritted out. His body was tensing, his balls drawing up. Then, in a move of shocking flexibility, he hooked his hands behind his knees and pulled his legs up and back, putting his entire lower body on display, his ass in the air, his cock thrusting into Emma’s frantic hand. The position was profoundly vulnerable and blatantly lewd. “Don’t stop, don’t fucking stop!”

Emma stroked him, hard and fast, watching the transformation of this person he loved into a strung-out, desperate animal. With a raw, guttural shout, Liam came. Thick, pearly ropes of jizz shot upward, arcing through the air. And true to their deal, as the pulses erupted, Liam stretched his neck forward, his tongue out, catching the first blast on his chin and cheek, the next directly into his open, waiting mouth. He swallowed convulsively, his throat working, as the last drops spilled over his lips.

He collapsed, legs falling, chest heaving. He licked his lips, cleaning them, a stunned, satiated look on his unfamiliar face.

Emma pulled his hand away, staring at the spend coating his own fingers. The smell, musky and sharp, was the same as it had always been. But nothing else was.

They lay there on the floor of the borrowed apartment, two strangers in a skin-deep world, the silence now filled with the deafening truth of what they had done, and the terrifying question of what they might become.

They lay there on the floor of the borrowed apartment, two strangers in a skin-deep world, the silence now filled with the deafening truth of what they had done, and the terrifying question of what they might become.

The taste was still on Liam’s lips. The smell was in the air. Ryan—Emma—stared at the ceiling, the phantom sensation of a hard cock pulsing in his hand. His own body felt electrified, sensitive in a thousand new ways, but hollow. An emptiness yawned inside him, a physical ache that was more than confusion. It was a specific, hungry need.

His brain suddenly craved what he had missed. A cock. He couldn’t help it. The image of Liam’s, thick and spent on his stomach, filled his mind. Before he could think, before shame could kick in, he rolled onto his side and leaned forward. Liam was still soft, wet, and glistening. Emma put the half-hard cock in his mouth.

The taste exploded on his tongue—salty, musky, profoundly intimate. Him. Her. Them. It was all tangled up in the flavor. He suckled gently, and the flesh began to stir, thickening against his tongue.

“Fuck, Emma,” Liam moaned, his hips giving a tiny jerk.

The response, the hardening, sent a jolt of pure, victorious heat straight to Emma’s core. He sucked harder, taking more in, using his tongue the way Mia had once liked. Liam’s hand tangled in his long blonde hair, not guiding, just holding on.

It happened fast. With a choked, surprised groan, Liam tensed. Another hot, bitter spurt hit the back of Emma’s throat. He was caught off guard and panicked, pulling off and spitting the cum out onto Liam’s stomach and thigh.

Liam laughed, a breathless, astonished sound. “Holy shit. I didn’t know I could cum twice.”

They spent the next few minutes cleaning up in a daze, using the hoodies they’d worn, avoiding each other’s eyes, trying to figure out what they should do next.

“We should go out,” Liam said, standing and stretching his new body with a comfortable arrogance that was so unlike Mia it was jarring. “Since everything’s covered. Live the identities. See what it…feels like.”

“Go out? Like this?”

“Yeah, like this. We’re not going to sit in this sterile bullshit apartment for a week.” Liam was already moving toward the bedroom, pulling out dark jeans and a black button-down. He dressed with a new efficiency.

Emma stood, feeling exposed, and automatically reached for his discarded gray hoodie and sweatpants.

“No, no, no,” Liam said, turning, his eyes sweeping over him. “You have to dress up. That’s the point. A skirt. A top. Real panties. You’re Emma Reed, not some gym rat.”

Emma blushed, a warm flood that crept from his chest up his throat. “I’m not wearing that.”

“You are.” Liam walked to Emma’s closet and pushed the hangers aside. He pulled out a short, sleeveless black dress made of some clingy fabric. He tossed it on the bed. Then a lacy black bra and a tiny pair of matching panties. “This. Put it on.”

“Fuck you, that’s practically a t-shirt.”

“Put.It. On.” Liam crossed his arms, his biceps straining the shirt sleeves. It was Mia’s stubbornness in a frame that could now enforce it. “Or I’ll put it on you.”

The protest died in Emma’s throat. He caved to the pressure, the weird curiosity, the need to appease this new dynamic between them. He dressed clumsily. The panties felt absurd, a scrap of lace cupping his hairless pussy. The bra hooked in the front, lifting and separating his small breasts into a defined cleavage he’d never had. The dress slid on, shockingly short, ending mid-thigh. It clung to every curve.

“Shoes,” Liam commanded, producing a pair of black heels.

“I’ll break my ankle.”

“You’ll learn.”

The walk to the restaurant a few blocks away was a lesson in existing as prey. Emma felt the eyes of every man on his body—a lingering glance from a guy on a bike, a slow, appraising sweep from a group outside a bar, a frank stare from an older man in a suit. The sensation was a cocktail of violation and a dark, unwelcome thrill. The heels changed his gait, forced his back to arch, his ass to tilt. Liam walked beside him, a protective, possessive presence, reveling in it all.

The restaurant was all low lighting, dark wood, and the murmur of expensive conversation. They were seated in a corner booth, plush and semi-private. Emma slid in, his legs instinctively falling apart as he sat, and the short dress rode up, clearly revealing the black lace of his panties against the pale skin of his inner thighs.

Liam leaned across the table, his voice a low growl. “Cross your legs. You need to act like a lady.”

Emma flushed again, snapping his knees together. The lace scratched. A waiter appeared, and Liam ordered for them—martinis, scallops, a steak tartare. The performance of normalcy was excruciating.

Their drinks came. The cold gin bit Emma’s throat. He felt something building again, a restless, crawling need under his skin. It wasn’t thought. It was a craving, a compulsive hunger. His eyes locked on Liam’s hands, on the bulge in his tailored jeans.

His hand shot under the table, across the space between them, and into Liam’s lap. He found the hard line of him through the denim and began to stroke.

Liam’s fork clinked softly against his plate. He was startled, but a slow, excited smile spread across his face. He adjusted his posture, giving Emma better access.

“Someone might see,” Liam murmured, not stopping him.

“They won’t.” Emma’s voice was tight. He unbuttoned the jeans, worked the zipper down, and slipped his hand inside. Hot, bare skin. He was already hard. Emma’s own breath hitched. He stroked him, his movements hidden by the long tablecloth.

Liam took a sip of his drink, his eyes dark. He leaned forward, his voice a mere breath. “You should get under the table. Finish what you started. Like I did for you that one time. In your dad’s home office.”

The memory was a ghost. A year ago. Mia, grinning wickedly, disappearing beneath his desk while he tried to play video games. The shock, the unbelievable pleasure.

Without a word, Emma slid out of the booth. He dropped his napkin as a flimsy excuse, then bent down and disappeared beneath the heavy table. The space was dark, smelling of polished wood and old carpet. He knelt between Liam’s spread legs.

He didn’t hesitate this time. He took Liam’s cock into his mouth with a desperate hunger, bobbing his head, using his tongue, drowning in the taste and the weight and the absolute taboo of it. Liam’s hand came down, gripping his hair, not gentle now. The rhythm was frantic, silent, and filthy. Emma could hear the quiet chatter from other tables, the clink of glasses. He felt Liam’s thighs begin to tremble.

The climax was swift, a stifled groan from above as Liam’s hips bucked up, pumping into Emma’s mouth. The bitter heat flooded his throat. He couldn’t bring himself to swallow yet. He pulled off, scrambled up, and grabbed his water glass. He spat the thick load into it, where it clouded the ice.

He slid back into his seat, his heart hammering against his ribs. His lips felt bruised. Liam was re-buttoning his jeans, his face a mask of calm ecstasy. He looked at the water glass, then at Emma.

“We should probably order dessert,” Liam said, his voice rough at the edges. He signaled the waiter, who glanced at the cloudy water glass with a politely concealed look of distaste.

“More water for the lady,” Liam said, smooth as glass, as Emma stared at the tableau of their own depravity, wondering what other cravings the night—or the drug—had in store.

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