Slime
by Bisamrattan
Copyright© 2026 by Bisamrattan
Fiction Sex Story: Three girls are trapped in a basement with live slime. It's not there to eat them, though.
Caution: This Fiction Sex Story contains strong sexual content, including ft/ft Teenagers Consensual Reluctant Fiction Horror Humiliation Transformation .
“Ouch!”
Maya fell on the cold stone. She managed to cushion her fall with her arms, but she hit her knees and elbows, and it hurt!
“What are you doing!”
With a short, furious cry, her friend Sandra hit the floor beside her.
“How do you dare!”
Maya rolled to her bottom, just in time to see their captors leaving and closing the heavy door. They were left in the cold, unwelcoming basement that stank of moldiness, stale water, and some unfamiliar tang. A dim light struggled through the dirty, glass-paned little windows near the ceiling.
Sandra jumped to her feet, ran to the door, and hit it with both fists.
“Let us free! You bastards!”
But her hits did not even make a sound. The door was really heavy and thick. And nobody answered her.
Maya rose to her feet, shaking with the adrenaline rush. What’s the fuck? They were just walking along the peaceful streets! It was a nice summer evening, the first day of their trip to another country ... Right, it was a new and unfamiliar city, but all tourist prospects listed it as a safe and friendly place with extremely low crime levels!
“Shit!”
The girls embraced each other. Despite her boldness, Sandra was shaking too.
“What are they going to do to us?”
“I dunno. It’s all a stinky, creepy setup! We need to keep calm...”
But they could not stay calm. The dark stone was damp, covered with some kind of moss. A very thin film of clear, glistening slime covered a bigger piece of the floor and walls close to their right. The floor was not flat, and the slime, shining in the light, gathered into puddles.
A sound – half a moan, half a chuckle – came from the corner. They turned sharply.
A girl, like them, maybe a bit younger, fifteen years or so, was sitting on the cold floor, hugging her knees. And she was totally naked! Her greasy hair was matted into messy locks, and her dirty skin glistened as if smeared with some kind of oil. The girl had a hazy smile on her face, a weird dreamy one, with no signs of terror.
“Oh ... so they’ve captured you too,” she murmured. “Nice ... At least I have company now...”
They stepped to her. Maya crouched and touched the girl’s glistening shoulder, and pulled her hand away in fear. Strands of some kind of sickly slime trailed after it. She quickly wiped her hand on her jeans.
“What is this ... gunk?” she asked, trying to keep her voice from breaking.
“How long have you been here? Who are they? What ... what have they done to you?” Sandra insisted, her voice also trembling.
The girl looked at her own body, at her sticky thighs, at her belly, at her hard little nipples, and a little smile touched her lips. She yawned, strangely relaxed despite her state.
“I dunno. For two days, maybe ... Or three ... I lost count, and stopped caring.” She looked at Sandra. Her face was feverishly sharp, but she did not look exhausted or starved. Rather, high. “I don’t know who those creeps are. They’ve just grabbed me, took off my phone, and threw me here. They did not return ... until they brought you here, too.” She chuckled. “I’m Dana, by the way.”
“Maya.” “Sandra.”
“Nice to meet you.” The girl giggled.
Maya and Sandra burst into short, nervous laughter. The absurdity of the situation, this dark basement, the danger ... The stress demanded some release.
“You are so fucking calm!”
Dana shrugged. “What else can I do? Only wait for the rescue ... or for them.”
“Rescuers will surely come, yes,” Maya insisted. “But who are they?”
But before Dana could answer, she gave a little gasp. She suddenly threw her head backwards, arching her spine. A visible wave of pleasure went through her body. Her small breasts with their pointy nipples pushed forward. She clenched her teeth, suppressing a loud cry. A soft gurgle broke from her lips. Her toes curled against the sticky stone.
Maya and Sandra froze, staring at her with horror. It did not look like a seizure, but rather like...
Dana’s body shuddered again and again, with her eyes rolling, her teeth clenched, and the sticky slime coating her skin shimmered under the dim light.
When the spasm finally subsided, Dana slumped and then stretched lazily, like a cat in the sun.
“Aahh ... That’s life...” she whispered, her voice raspy and breathless.
“W-what’s that?!” Maya cried, stepping back.
Only now did she notice that Dana was sitting in a deep puddle of slime, thick and clear, like ... like the thing that covered her skin. And the slime seemed to move! Its surface rippled, raised, connected with the girl’s crotch ... flowed into her both bottom holes...
Maya felt nauseous. She glanced at her friend. Sandra, with her face pale, pressed her palm to her mouth.
“What’s this shit?!”
“Aaa...” Dana opened her hazed eyes. “It’s the slime. I dunno ... just the slime. It ate my clothes. And it ... Aaaahhh...” And she tensed and trembled again, breathing hard. “It ... keeps me warm ... and feeds me ... and it eats me ... but in a good way...”
“What do you mean, it EATS you?!” Sandra almost screamed.
Dana chuckled. “What do you see? Guess! Like a man eats a woman ... Makes me feel good ... really good ... So good...” Dana gasped, her chest rising and falling with her deep breaths.
Sandra stared at the corner where Dana sat, her eyes wide with terror. But before she could say anything more, she flinched, her face twisting in disgust. She quickly lifted her foot.
“Ew! Gross! Shit!”
At the sole of her canvas sandal, a long, stretchy fiber of slime clung, glittering in the dim light. She tried to shake it off, but the fiber did not tear apart. She scrunched her face in disgust, reached down, and pulled it from her sandal with a quick, sharp movement, her fingers pinching and holding the viscous thread.
The slime clung to her fingers like hot wax. As if alive, it immediately started to spread, enveloping her fingertips in a clear, glistening glove. And she also felt it crawling under her sole...
She panicked.
“Shit! Shit! Get it off! Get it off!” She flailed her hand wildly, trying to shake off the slime.
Maya turned to help her, but slipped and fell into a puddle.
“Ouch!”
The slime was on her feet, too, and it quickly soaked through her jeans.
Dana gave out a long exhale. She watched the girls with calm, wide eyes.
“It’s no use...” she whispered. “It’s what happened to me. Once the slime sticks to you, it never lets go. It ... likes you.”
The girls stared at each other, their faces masks of horror. Sandra, frantically trying to wipe her fingers on the rough wall, managed to rub away the glistening threads. But that didn’t help. Another thin fiber slithered up from her sandal and wrapped around her ankle. And then another ... And more ... And then she felt it on her other foot, too.
The tang intensified. It smelled like nothing familiar, but not disgustingly. Like a striking, very niche perfume.
Maya tried to crawl out of the puddle, but the slime was surprisingly tenacious. A translucent film already covered her calves, crawling up her shins.
“Aaa ... NO!”
The fabric of her jeans, where the slime touched it, started to melt and unravel into threads.
It was a terrible sight. The thick blue denim grew thin, threadbare, then turned into a wet, sticky mess that spread over her legs. She was watching her favorite clothes literally eaten away by the slime right on her body! And that disgusting touch to her unprotected skin...
Dana let out a soft giggle.
“See? That’s the start. It likes the taste of cotton, too. And everything else, except...”
She didn’t finish. She arched her back in yet another shuddering orgasm, her glistening body gleaming. She let out a soft moan, her eyes rolling into her head, her toes curled, scraping the wet stone floor.
“ ... aaahhh ... except your flesh. It likes our flesh. It loves it...”
Sandra wept. “N-no ... Please...”
The bottom of her jeans was quickly dissolving, and the line was moving up her legs. Her sandals were already gone, and she stood barefoot in the deep puddle of the slime.
Maya struggled to her fours, glanced around, and screamed in terror. The whole floor around them was covered with the slime, and it slowly but steadily flowed towards them.
“Aaahhh ... Don’t fight it ... It’s no use ... I fought, but it’s stronger...”
With a long moan, Dana turned and sprawled on the floor, rubbing against it. The thickening slime was crawling to her, too, covering her everywhere, as if welcoming an old friend.
Sandra tried to jump away, but her feet remained stuck as if in thick, gluey mud. She tripped and fell next to Maya. More slime gushed at her from the puddle, crawling up her thighs, her sides, her stomach.
She clawed at her waist, trying to create a barrier, a dry spot she could hold onto, but her fingers only sank into the viscous mass. Wherever she touched, the fabric of her T-shirt dissolved into shimmering fibers, eaten away with unnerving speed.
“No! No! NO!”
Maya scrambled backward, her jeans already gone to her hips, turned into slim shorts that were going shorter and shorter. The slime coating her bare legs was not unpleasant to the touch, warm and tingling, which made it all the more horrifying. It playfully spread her toes and crawled between them, tickling her tender skin. It wasn’t just a substance; it was something that had intention.
“This cannot be happening! Shit!”
“Heeeelp!”
Then a different sensation started, a subtle pulsing against the skin of her thighs. A deep, thrumming vibration that resonated not on the surface, but somewhere deep inside her muscles. It was a strange, rhythmic massage, and despite the terror, a traitorous warmth began to pool in her lower belly. She clamped her legs together, trying to stop the invasion, and felt the slippery layer between them.
Dana moaned on the floor, curling up, writhing, and rolling over within a large, transparent, gelatinous lump of the slime. One of her hands squeezed her breast, another worked fast between her thighs, while the slime rippled, flowing into both her bottom holes. She seemed insane in her unstoppable bliss.
“You’ll understand...” she managed to utter between the sobs of ecstasy. “You’ll understand it all ... Aaahhh...”
And, in horror, Maya saw the thick slime tendril crawling into blissfully open Dana’s mouth, and she only opened it wider, welcoming it...
Sandra, on her back, wailed in despair as the t-shirt around her midriff dissolved into nothingness. Her naked belly was now exposed, and the slime immediately attacked it with greedy tendrils. They swirled around her navel, exploring it, and then flowed downwards, under the waistband – the last remaining part of her dissolved jeans. And, to her horror, her panties were also gone!
“No! Please, no!”
Her fingers slipped, coated in slime, as she attempted to hold onto the last vestiges of her clothing. The fabric thinned, became a grayish paste, and then was gone, leaving all her body completely exposed, smeared in the slime and the dirty leftovers of her clothes.
Maya’s last remaining piece of clothing, her shirt, did not hold any longer. Damp splotches appeared on her chest, the fibers darkening, then seemingly evaporating. She slapped her own chest, a desperate, flat sound against wet skin, trying to dislodge the stuff.
“Nnngh!”
Her fingers brushed her nipple, already erect from the strange, vibrating warmth, and she convulsed in sudden sharp pleasure. She nearly orgasmed just from touching her nipple! She never was so sensitive! What is this shitty slime doing to her?
She closed her eyes and felt the slime moving all over her skin, touching, probing, tickling, and tingling ... caressing her with warm strokes ... She shuddered in shame, but she could not deny it. The touches were pleasant, more pleasant than any caresses she felt before!
Sandra’s cry was raw, strangled. She squeezed her thighs shut, but the slime simply flowed between them, a warm, thick river seeking its source. It pooled in the hollow between her legs, and the gentle, persistent throbbing centered there, becoming more focused, more insistent. The vibrating pressure against her clit was a steady, maddening beat, a tiny hammer of forced pleasure.
“Stop it,” she whimpered, a tear tracing a clean path through the grime on her cheek. “Please ... oh god, make it stop.”
But the uninvited thought kept thumping in her mind: did she really want it to stop?
The slime ignored her plea. One thick, pulsing appendage, stronger than the others, pressed firmly against her entrance, testing its resilience. Another, slenderer tendril found her other hole, circling it with a maddening, slick delicacy. The double-pronged invasion sent a violent, unwelcome jolt through her. Her hips bucked, a movement that was all instinct, all biology, and completely against her will. The slime seized the opportunity.
“AAAHHH!”
A slick ribbon pushed into her, not violently, but with an undeniable, inescapable pressure. Her body, slicked with slime, offered no resistance. The slime began flowing inside, stretching the entrances, stretching her insides, going deeper...
It was the last straw. With her face burning with shame and disgust, she fought to hold it, and lost. She arched in the sweetest and most intense orgasm in her life.
“Haha! I told you! Don’t fight it!”
Dana, spread-eagled on the stone floor, was trembling in aftershocks. The slime gave her a brief pause, but it definitely was not the end. She looked completely, insanely happy, as if this entire basement was the best amusement park in the world. She winked to Maya.
“It’s the start ... And ... oh! ... it’s ... endless...”
Sandra shuddered and went limp, her body quivering, her mind blank, the only remaining thought ‘this cannot be happening’, over and over. The slime paused for a moment as if tasting its victory, and then the rhythmic pumping continued, and another orgasm rolled through her almost instantly, sharp and sudden. It crashed over her defenseless body before her mind could form another coherent thought. And then another and another, each beginning before the previous had even fully faded, a chain reaction of uncontrollable rapture.
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