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Lab Partner

At that point, i took off her special collar, since if the growth serum worked on her i'd have to make her a bigger one.

Compassion, Eevee, First Time, Human, Impregnation, Love, M/F, Pokemon, Science, Transformation, Vaginal, Zoophilia

Kaiju Kingdom

"exactly two hours after receiving your dose of growth serum its effects will begin to wear off and it will take around ten minutes for you to return to your usual size.

Destruction, Giant, Growth, Macro, Merric, Merric Sands, Squirrel, Theme park, kaiju, rampage

Inflation Intoxication: Chapter One

“oof…" she couldn't be caught there naked, despite how she wanted to get her hands back on the chemicals and make more growth serum.

Adult characters, Arousal, Ass inflation, Belly Inflation, Body part transformation, Breast Inflation, Clit growth, Consensual, Erotic, Extreme, F/solo, Fantasy, Female, Female/solo, Futa, Futa mention, Future futa, Growth, Human, Human Only, Human-Only, Hyper, Hyper Inflation, Hyper growth, Inflation, Kinky, Lactation, Lust, Masturbation, Messy, Milk, Orgasm, Outgrowing buildings, Outgrowing rooms, Pussy inflation, Short Story, Size Increase, Story, TF, Transformation, Unexpected growth, desire, erotica, expansion, fetish, kink, woman

The Need to Breed

He finally put two and two together: the liquid they were drenched in must've been that vat of growth serum. “good," hissed karna as she stalked her way up to the human and pushed him down to the ground.

Adult Content, Amazon, Anthro, Aphrodisiac, Big Tits, Breast Fondling, Breast Growth, Breastfeeding, Breeding, Claws, Cock, Compassion, Cowgirl, Creampie, Cuddling, Cum, Cumming, Deathclaw, Deathclaw matriarch, Deep Penetration, Domination/Submission, Fallout, Fear, Female, Femdom, First Time, Foursome, Growth, Harem, Human, Hybrid, Impregnation, Interbreeding, Interspecies, Kinky, Lactation, Love, Lust, M/F, M/F/F/F, Male, Mating, Messy, Missionary, Muscles, Musk, Mutant, Nipples, Non-Anthro, Orgasm, Pheromones, Post-Apocalyptic, Pseudo-Rape/NC, Pussy, Rough Sex, Scales, Scalie, Sci-Fi, Short Story, Size Difference, Straight, Transformation, Vaginal

ECF Overload (Freebies #57: Muscles Edition!)

The wolf-naga had to admit shi may have miscalculated the potency of hir growth serum as shi found hirself pressing hir chest up against the thick black stalk. the veins shi caressed were almost as thick as hir arms.

Breast Growth, Cougar, Cum, Growth, Hermaphrodite, Hyper, Hyperphallic, Masturbation, Muscle Growth, Muscles, Rabbit, Seriously a lot of fuckin' growth people, Wolf-naga, h/h/h

Deer-Gro (Macro/Vore Story)

Neil orders a growth serum off the internet, and quickly turns his city into hoofprints - and attracts some worshippers... there were few things more tense and exciting than waiting for a package.

Bleater, City destruction, Cock Vore, Cock Worship, Cum Digestion, Deer, Digestion, Dragon, Growth, M/M, Macro, Masturbation, Micro, Orgasm, Pilar, WORSHIP, huge, neil, rampage, vore

Inflation Intoxication: Chapter Five

Passion tangled and ached and she moaned aloud, grateful only for the desire, everything that had come to her after she had taken the growth serum.

Anal, Anal Sex, Ass, Balls, Bareback, Big things small places, Blowjob, Boobs, Breasts, Clit, Clit to cock transformation, Cock, Cum, Cunnilingus, Deep Penetration, Double Penetration, Dubcon, Dubious consent, Erotic, Exhibitionism, Extreme, F/solo, Fantasy, Female, Female to Futa, Female/Female, Female/Futa, Female/solo, Futa, Futa/female, Futa/solo, Gangbang, Group, Group Sex, Growth, Human, Human Only, Human-Only, Hyper, Inflation, Kinky, Lactation, Licking, Messy, Milk, Non-Consensual, Oral, Oral Sex, Orgy, Public, Pussy, Rough, Rough Sex, Short Story, Size growth, Story, Stretching, Teasing, Transformation, Vaginal, Vaginal Sex, Voyeurism, Women, absorption, erotica, exhibitionist, fetish, kink, mess, public sex, semen, sucking, voyeur, woman

Macro Furries

I even did the same to my own black lab canine companion, before i examined the new cells i made a growth serum to make dogs and cats have new body cells and would grow big. and yes i am both a scientist and a pet shop owner.

Destruction, Giantesses, Growth, Human, Love, Macro, furries

Gap Year: Parisian Assault

It's where they inject the patient with the bone growth serum." laney grabbed emilie's ear and twisted it, dropping her to her knees to see the scar. "it's on jake too. but there's also another scar by her tail. on the lower back.

Ferret, Fox, Groping, M/F, NC, Panther, Plot Development, Story Series, Violence (Not In Yiff), Wolf

Terra's BIG Day

But vince's grin turned even more wicked, as he held up a canister of pure growth serum he had picked up as the building was collapsing, before screwing it open, and downing its contents...

Bahamut-255, Destruction, Dragon, Gila monster, Growth, Lizard, M/F, Macro, Reptile, Terra Crescent, Windragon

Full Moon Roar

Cauldron lake had been thoroughly damaged thanks to vragg's overdose with his growth serum "full moon howl", but his assistant and lover zhara had managed to convince everyone it had been a test.

"Full Moon Howl", Ball Growth, Cauldron Springs, Cock Growth, Destruction, DragonMasterX, FMH, Full Moon Howl, Growth, Growth serum, Hyperphallic, Macro, Male, Muscle Growth, Taj, Tiger, Vragg, Wolf, Zhara, expansion, rampage

Exhibitionism Stream Story 10: Mongoose Bait

Drakehavok had the idea of a perpetual cock growth serum being spilled on him, driving him to run through the city to get home and find something to cover himself. little did he know that he'd be running into a size queen prince.

Big Cock, Cock Growth, Cum, Dragon, Exhibitionism, Fellatio, Humiliation, M/M, Mongoose, Oral, Public, Size Queen, Teasing, huge cock