RELATIONSHIP: Dren (Male Form) x Fem Reader
SUMMARY: As a lab assistant to the rebellious scientists Clive Nicoli and Elsa Kast, you assist with their extensive research and care for their modified creation, Dren. This spliced creature, which has grown significantly, becomes very attached to you. Eventually, Dren changes sex with the aim of mating with you.
WORDS: 4,367
TAGS: Splice (2009), Dub/Con, Imprinting, Mating Bond, Sex Change, Yeah…I’m making Dren use that tail, Pheromones, Scents & Smells, Choking, Thigh Sex, Wet & Messy, Virginity Loss, Penetrative Sex (Vag + Peen), Dren’s Packing, Nipple Teasing, Cockwarming, Belly Bulge, Breeding, Creampie, Ownership, Capturing, EXPLICIT CONTENT 18+
Your job as a lab assistant to the couple Clive Nicoli and Elsa Kast was simple. They were two clever scientists who were performing an act of rebellion by splicing animal genes and human DNA to create the creature you knew as Dren. Your typical duties were managing inventory, supporting the workaholic couple with research and sample preparation, and, most importantly, caring for Dren while keeping the project secret.
That was arguably the most challenging task of all, given Dren's unique nature. Her growth spurt was unlike anything seen in humans; she grew in the blink of an eye. Her long, statuesque legs became muscular stilts, resembling a kangaroo's, ensuring her kicks would definitely deliver a punch. Her webbed feet stomped around her enclosure as she engaged with the enrichment activities provided by the scientists. While other parts of her body resembled those of a human, such as her genitalia, breasts, lips, nose, arms, and eyes, though they were spaced further apart than usual. Her hands were also distinctive, with about four fingers on each. Last but not least, her long tail would wave delicately behind her. Despite her unusual appearance, her personality was angelic, pure, and innocent, though she could be a bit bratty. When in the lab, her big, round eyes often longed to explore outside; however, the eager team made it clear—never to let Dren out.
There was still no telling what Dren’s capabilities were or what animalistic behaviors she’d display if she ever channeled her animal genes. However, from time to time, you’d perform a little act of rebellion yourself, because you couldn’t deny that Dren had a persuasiveness about her that, with one long, steady gaze, could get you to let her roam the lab. The two of you communicated through her Scrabble tiles, but you’d grown so accustomed to her that picking up her nonverbal cues and bird-like noises was like having conversations with any other human. This no longer felt just like a job; you had created a strong, unbreakable bond with Dren.
Even the scientists picked up on her changed behavior. How she perched up when she saw a white lab coat enter the room, spelling your name in Scrabble, and throwing tantrums if she couldn’t be let out, unbeknownst to everyone on the premises, while you were allowing it to happen when no one was there. Dren had become bound to you. An insanely tight knot that, no matter what twists and turns could happen it would only strengthen the bind. Dren knew one thing: you were inseparable.
The feeling persisted, and tonight even stronger during another quiet night in the lab. Just about finished with your task, Dren noticed the usual routine of you closing down shop and heading out the door. She whined, stepping closer to the immaculately clean glass of her enclosure, and it, of course, stopped you in your tracks.
“Time for me to go, Dren.” You smiled weakly, your eyebrows softening as the theme of devastation was painted across Dren’s face. Her head tilted, bottom lip pouted as she released a low, mournful groan.
“I already let you out tonight.” You tapped on the glass softly, catching onto her mind game of being free from her enclosure. You continued, “And longer than usual this time.”
Dren pressed her palm against the glass, her fingers relaxing as her fingerprints spread across its surface, no longer holding any pristine expectation. You smiled quietly with lips closed, eyelashes fluttering toward Dren as her large, expressive eyes watched you. Not even a blink could take her gaze away. Even after you left the lab, the scent of your presence lingered—floral notes from your perfume, your hair, every aspect of your stunning appearance, like a flower with fully open petals, showing its gorgeous fragility. Bright and captivating, Dren’s heart raced with the desire to fly into your arms to taste your nectarous lips and more.
“Goodnight, Dren. I’ll be back early tomorrow.” You placed your hand on the glass, your tone defeated and saddened by the fact that you had to leave her. As you began walking away, you could hear her saddened whine, and it was too heartbreaking to turn around and witness it. You shut the door and headed to the locker room to grab your things. Just as you were beginning to slide your arms through your heavy coat, a thunderous crash happened in the distance. Fuck.
The noise grew louder, sounding like a storm had torn through the lab. You slammed your locker shut and hurried to the lab, only to find darkness apart from the faint glow from Dren’s enclosure. The fluorescents cast half the room in a bright turquoise, while the rest remained pitch black, concealing the mess of destroyed research. As you stepped forward, your shoes crushed broken glass, each step echoing with an irritating crunch. Approaching Dren’s enclosure, you faced the worst possible scenario: Dren had escaped, defying the critical rule that in this moment you wished you could ignore.
“Dren?!” The ground beneath you felt like an earthquake was happening, at least you wished it were, as it would be a better explanation for Dren’s escape. Fuck. Fuck. I’m so fucked. You could hardly concentrate on a plan as your head whipped around the room, making your neck soon feel like it might pop off like a soda cap.
You stepped over the sharp, ragged edges of Dren’s enclosure. Her pictures, blankets, and collectibles were all found in dismay. Even her bed had pulled out from its usual position, almost as if she had kicked it out of frustration. Picking up a stuffed animal, you stared down its soulless eyes, pondering what you were going to say to the scientists, how you were going to clean this mess, and an array of thoughts surrounded the destroyed research. Then, a heavy stomp followed by the ear-splitting sound of glass crunching pierced your ears, and before your eyes parted with the stuffed animal with great force, your back clashed into the wall.
A heavy hand completely covered your neck with a strong grab and push against the wall, making your vision blur briefly. While your sight was blocked, your hearing picked up a deep inhalation. Then, along with the firm grip, you felt the softness of skin brushing your cheek as someone buried their face in your hair. A small squelch escaped from your throat as the hold tightened again after the person inhaled your scent once more. You felt as if you’d become a hand-picked flower and someone had become intoxicated by your scent with every inhalation.
“D…dren? Is that you?” Your vision returned; everything that had seemed to spin settled back into place, but when you blinked back to reality, you were consumed by a large presence. Their body was built with muscle, and their towering stature seemed to swallow you in its shadow. Your eyes tried to move in ways your head couldn’t as you were planted against the wall, but it was useless. The presence had shielded you from seeing anything but its sculpted shoulder. Each muscle was beautifully defined as it continued to smell you. A deep, guttural groan rumbled loudly from their lips. Their free hand snaked along your waist, squeezing you tight with an unremarkable strength.
Despite the crushing weight of the embrace, it began to feel like the long embrace you yearned for. One you didn’t know you needed until it was happening to you. You ran your fingers along the back of the dominant presence, feeling scars there. Thin, vertical parallel lines that made your heart race as you began putting the pieces together.
“Dren?” The words hardly left your lips, and with another tight grasp this time on your wrist, you felt Dren’s tail restraining you from touching him. Your breath shuddered as you felt the long, wet stroke of Dren’s tongue gliding across your ear, and the hungry growl that reverberated from his throat made your stomach twist into knots. Biological metamorphosis.
You wondered whether the scientists knew if this was even possible. Dren’s arm slipped from the tight hold and glided down your back as you arched under the heated touch. He cupped your ass and pressed your waist into his, momentarily allowing you to feel the weight of something more powerful than his tight hold. You were stunned by Dren’s transformation. Though you couldn’t see his entire body, you could sense the dramatic change—his firm grip on your ass, his thickening tail along with other areas, and the urgent, sensual growls that revealed his intense desire to mate. This overwhelmed you, causing your body to submit. At that moment, Dren was about to get everything he coveted: freedom from his enclosure and you.
Dren’s tail loosens from your wrist, and, by twirling it, you allow blood circulation to return to normal. He lifts his head from burrowing in your hair, and you see the result of his new form. You are speechless, mouth parted as a soft breath escapes. Dren appears somewhat the same, bald with the vertical scar that runs from the top of his head to between his brow bone. Except his eyes hold a determination, darkened by a ravenous hunger only you can appease. His nostrils flare as he continues to be consumed by your scent, both your perfume and the overpowering fragrance of your arousing pheromones, as your body doesn’t wish to deny him.
Dren tilted his head inquisitively, recognizing that your body was accepting him, the signal making his cock thicken between you two. It bucked vigorously in the tight space between you both, and with every movement, you couldn’t believe he was still getting bigger. As you tried to look down, Dren quickly held your neck, keeping you pressed against the wall. His other hand pushed your waist towards him, giving his hefty cock the chance to slither between your pillowy thighs. Even without eyebrows, you could see the sensation had quite an effect on him as he furrowed deeply, accentuating the scar between his brow bones.
A sharp, heavy breath left his lips, his chest shuddering as he squeezed your ass tighter, pulling you, not allowing even the smallest gap between you both, and slowly he began fucking your thighs. Dren couldn’t put into words what this piece of clothing you wore was, but even before today, the display of your voluminous thighs whenever you wore it made him feral. Triggering a response that grew fonder and stronger every single day until tonight, his body could no longer withstand its need to mate with you. With every hard thrust, Dren imagined the switch in your thighs, when you’d bend over to pick things up, the rise of your skirt when you sat down. He dipped his head into your neck as he released his hold around it, and as he did, you breathed deeply, allowing your head to collapse on his resting head. Dren’s grunt echoed within the destroyed lab, his cock still continuing to thicken as he was being squeezed tight by your thighs. A loud thud above your head made the wall quake as Dren’s hand pressed hard into it. The steady drag of his cock between your thighs was also affecting your swollen clit as every stroke made it swell with pleasure. Your underwear was now soaked beneath you as Dren’s cock was brushing along it.
“Ahh, fuck. Dren.” Arms and thighs wrapped around Dren, you pulled him close. Hugging his broad body tight, tracing the scars where his wings remained hidden, and your thighs shut tight around his thick cock. So tight that every tug away from you felt like his dick would get stuck between your plush thighs. The grunts became growls as Dren felt your body so close to him. The proximity was like no other. You were soft, warm, and wet. His cock could feel the damp fabric as his thick shaft brushed against you, teasing your clit.
You grasped his back, pulling him nearer as your body tensed and your clit swelled beyond capacity, and you were-
“Dren, I’m coming!” You braced yourself, holding onto his back while yours began sinking into the wall. Dren clutched your ass now beneath the fabric of your skirt and pushed your hips back into his. A heavy cascade of precum trickled down your thigh as Dren pumped harder, faster, smelling that you released yourself, and the result was more than the mess you made in your underwear. He held onto your waist with both hands, positioning your body just where he needed it as his hips worked quicker, and suddenly, you were feeling a radiating warmth slip down your thighs. Dren released a deep, sensual growl as he licked your neck, devouring you in more ways than one.
As soon as he came without even a pause, he tore away your clothes, stripping you of anything that could hinder his eyes from seeing such a beautiful sight. Within the chaos of shredded fabrics, you spot his throbbing cock, gasping uncontrollably as you witness its greatness. Thick, swole, glistening with his cum, his tip leaking precum and showing great desperation as one long strip of arousal hung from it. It bucked within the thin air, weighing itself down with its heaviness every time it jolted up.
Dren’s hand explored your body, brushing up your stomach, making your abdomen contract until he was kneading your breasts. Head tilting curiously as he played with their softness. His robust palms and long fingers covered them entirely. Squeeze, caresses, pinch. Dren fondled your tits until he could feel the hardening of your nipples against his palms. They were full and plump, just as his cock was, as he couldn’t bear to wait to be inside you any longer. Scooping you up by your legs, he pressed your back against the wall, watching your eyes as they widened once you felt his tip poking at your pure entrance.
Never having been touched aside from your own hands, you weren’t sure if you’d come close to taking in Dren. He was already far from human, and that came with an otherworldly cock. You planted your hands on his broad shoulders, both of you watching as your legs began to tremble, fueled by apprehensive thoughts that he would tear you apart.
He breathed deeply, thrusting his hips lightly as he pushed only his tip inside of you. Nails digging into his skin, you couldn’t imagine taking any more. His fingertips dug into your velvety skin, making you hiss at the pinch. You were tight, sucking him in before he had the chance to thrust his hips again to fill you up.
“Ahh, fuck.” You cradled Dren’s head as his face fell deeper into your neck, and the sincere touch made him push his hips into you. It was remarkable to Dren how wet you were, allowing his huge cock to make way inside of you. You were ridiculously tight; the hold around him was like a hug he’s never known. The tight embrace was enough to make him come. He sank you further down into his great length. Halfway there, your pussy stretched, and your eyes rolled back as you felt the throb of his cock. He sat inside of you, steady, allowing your body to adjust to him, but he also needed a moment to pause because another thrust and he would be spilling his seed inside of you.
Walls tightening around Dren’s cock, your prompt him to gradually push the rest of himself inside you.
“Ughh, Dren. You’re s…so fucking big.” Draping your arms around him, his head was completely buried into your neck. His breath warmed your skin, adding to the heat that radiated through your body. It was a passionate fire that scorched both of you, but the wetness beneath you made up for the intensity of the hot desire. Dren's movements were slow, his hips moving gracefully as he coated his dick with arousal. You were a mess, unraveling for a test subject that couldn’t handle another moment of goodbye from you.
Slick, wet sounds occupied the room along with Dren’s heavy groans and the occasional lap of his tongue tasting the sweat that was beginning to form on your skin. His dick pulsed at your taste…so you. Better than anything he’s ever indulged in, decadence at its finest. Even the small whimpers that escaped you were intoxicating, his fragile human wrapped around his cock and accepting it despite it being a challenge. His body could have had steam flowing from it as the warmth of your pussy made him overheat from his slick pleasure.
Dren’s hips bucked faster, eagerness rushing through his veins as your body relaxed, giving his cock more room to live inside you. But he was fucking huge, thick, and of great length that was hitting your inside, you’d thought you'd faint from how deep he was. Dren lifted his head, peering down between your legs at the creamy mess you made on him, but also the sight made your skin prickle with goosebumps as you witnessed the great bulge of his hefty length pushing inside of you.
You couldn’t believe it. Blinking your eyes and shutting them tightly, you wondered if, once they opened, you would be awakened. Jolting up from having fallen asleep at the computer as you pulled another late shift, but as you opened them all, what was found was Dren’s dick bulging your stomach.
Dren’s cock pulsed profusely, his tip aching as he felt your creamy walls cinched around him, and it was then he pushed himself inside of you as deep as he could, and you suddenly felt a wave of warmth filling up inside of you. Thick, heavy, and hot with a fiery passion. Dren screeched at the overbearing feeling of you coming with him. The mess of both your orgasms filling you up and slowly cascading from your tight walls as Dren couldn’t bring himself to stop. The late-night shift had taken an even more exhausting yet gratifying turn, and it was only the beginning.
Dren’s weight now enveloped you like a thick, quilted blanket, his body radiating intense warmth from head to toe. After laying you on the disheveled bed, now missing pillows and sheets. Dren was thrusting into you rhythmically, driven by the desire that had been building for months. The critical moment of his biological transformation was inevitable once it arrived. He pumped harder, living within the fleeting window he knew was possible because, even if you had left for the night, the scent of your aromatic pheromones would have guided him directly to your house.
The bed creaked, the squeaky sound echoing in the room along with your whimpers and Dren’s deep grunts. He studied your face, how differently you appeared with his thick cock poking at your cervix as he somehow was still managing to fit inside of you. But as your body continued to relax, hips softening as you opened your legs wider to let Dren in, there was a storm of pleasure that overtook him. You were gradually making a sticky mess on his cock, and with his seed planted inside of you, the slickness made him much easier to endure.
Dren’s lips parted as he suddenly began trying to imitate Clive and Elsa's move. He pressed his cool lips to yours, slipped his tongue into your mouth, and kissed you passionately, feeling as if he could taste every part of your essence in that moment. His tail snuck around one of your ankles, tight like an ankle bracelet, keeping your leg secured around his waist until he needed to open you up more. He would then use his strength to pull your leg open and sink deeper inside you. Dren’s tongue made you choke on your breath, leaving you with no choice but to breathe through your nose.
Dren couldn’t rest, even though he was quite the strong, able-bodied stature, even he was capable of growing tired, but the tight hold of your pussy made him feel like he was locked securely into your body. Legs tightening around his waist, nails digging into his pale skin, leaving trails of red on his back, Dren could feel his human fully indulging in the idea of being his mate.
You held his face gently, observing the features of his dominant glare. His brow bone intensified as he scrunched his face, frowning as you were beginning to drive him into another sweet release. You looked between your legs, his cock burrowing its head into your cervix, making one thing known to your body, and it was that he needed you to be his. A mate for life. And once the seed sprouted into a perfect specimen, Dren would be certain to release an unfathomable rage on anyone who dared to harm you. His escaping was dangerous enough; his impregnating his mate, whom he’d grown extremely fond of, was judgment day.
The thought hadn’t even crossed your mind, the dangers of what was to come if you were to conceive. But it was impossible to think with such a big gift unwrapped and presented to you. Dren’s cock pulsed, the continuous throbs showing a unique pattern and one that meant he was going to come again. You feel Dren’s thick tail tightening more around your ankle, unraveling your leg that was locked around his waist, and opening you more.
“Inside.” Dren’s words were deep, broken with pleasure as his heavy breaths were accompanied by each syllable. Dren lifted himself, pushing his palms into the backs of your thighs and putting all of his weight onto them. Folding your body in half and now giving his thick cock an even greater opportunity to be deep inside you.
“Ahhh, fuck!” You head sank into the bed, whimpers becoming loud moans as Dren buried himself inside of you. His strength was unimaginable as you felt your back being stuffed into the mattress, and you possibly getting swallowed by it. His tail waved behind him, long and floating within the steamy air of the lab room. That was until its great length slithered between your bodies, and he, with the same delicate wave against the air, Dren made his tail flick lightly over your swollen slit.
“P…please. Dren.” You tease your nipples as you feel them swell just as your clit. The pleasure was too much to endure the longer Dren kept you within his hold. Dren’s hips slowed; the wet sound of his cock retracting out of you made your ears perk up. He was allowing you to feel every unique part of his massive cock. The veins that protruded his shaft, his throbbing tip, its great girth, and the never-ending push of his dick pushing inside of you. Now the tip of his tail was covered in both your mess, flicking hastily all over your swollen clit.
“Inside, Dren.” You begged. “Come inside me.”
You were certain Dren somewhat understood you as he fastened his pace. Feeling that your body had no ability to wait for him, your eyes rolled back, and you were coming for him again. Dren felt the hold of your orgasm, the tightening of your walls closing in on him as if your pussy became his new enclosure. However, this was different, far from feeling trapped and alone. Isolated and cold. With you, he was safe and secure. Willing to give you everything, as you would give him a world of possibilities with his seed. A world where the influence of his nature drove him to want to start a life with you.
And when his imagination continued to run wild, his cock swelled at the sight of you beneath him, his cock filling your belly as he thrusted harder, faster. Your wet lips where he suffocated you with the passionate kiss and the beauty of your angelic face. The one human to have given him so much grace. You were his mate for life before you had even known. Dren pushed his cock inside you, his tip kissing the tenderness of your cervix as he came hard inside you. The pleasure was so intoxicating that his wings burst energetically from behind him as his head tilted back while he released a horrifying screech. It was like tires skidding along a drenched road as a driver lost control. As did Dren until his vigorous hips slowed and he didn’t move until every drop of his cum filled you up.
You were in awe of the great span of his wings and how they were illuminated by the intense light within the enclosure. You’d never witnessed him so…free. Slowly regaining himself, Dren’s wings retracted back into his muscular back, his head dropping down where his eyes were met with yours. As he pulled out of you, you could feel the heaviness of his cum dripping out of you. The mess was soaking into the mattress as you lay there exhausted. Dren’s head tilted, watching as his heavy load escaped you, but after such repeated pleasure, he was evident that mating went just as nature intended it to be.
“Dren, y…you can’t leave,” you exhaled tiredly. “You know you can’t leave the lab.”
Dren rose from the bed, gazing down at your sweaty, glistening body. Sweat trickled down your skin, and the mess between your legs, along with the exhaustion weighing on your eyelids, was evident. He observed your struggle to stay awake, but with no intention to keep you awake, he simply watched your eyes surrender until he was suddenly walking away from the enclosure. The sound of glass crunching under his feet briefly roused your eyes, followed by the distant clash of a window—Dren fleeing into the outside world. The escape triggered alarms throughout the high-security building. Although the piercing siren was deafening, it was barely enough to keep you conscious. Eventually, your body accepted its need for rest, but not before Dren heard the horns blaring and returned. Quickly, wrapping you in a nearby sheet and taking you with him.
Shout out to the lovely user who requested this!!! I’m so gagged that someone actually knows of Dren 😩 guys this is why it’s important to WRITE THAT FIC!!! No matter how small you believe the fandom to be somewhere on this big ole planet there’s AT LEAST one other person who enjoys it 🙂↕️🫂
I’m also posting this on my Ao3 “SpookyBeanWrites” and it will be added to my “Bedtime Stories” collection. Feel free to check out more short stories 🫶🏽
Per usual I’m always down for any request! I appreciate you all so much and all the constant support 🥹🫂 you all keep my creative mind going and I can’t thank you enoughhhhh 🖤🖤🖤
Scare you later 😈
