Muscle Girl Growth Stories

213,430 results
Orientation
Length
Source
Infinite Scroll

Well of Three Wishes

by mistyfdfa on Sep 16, 2017
Sci-Fi & Fantasy

This story contains some absurd levels of growth. If mini-giantesses with huge boobs are not a thing you enjoy, this story is not for you. It also has a reality bending component, if you like simple, straightforward transformations, this is a far cry. ***** It had been billed as a mystical place as part of the Magical Ireland Tour, but as Myra and Leela lo...

Amy - The Amazon (Usually) Ch. 06

by sexgundam666 on Jan 29, 2020
Sci-Fi & Fantasy

Amanda yawned and stretched to pop her joints. She didn't have classes that day, though Amy did. Despite the Amazon's protests, Amanda convinced her to go, largely to let her body relax after last week and the subsequent nights thereafter. Turned out she could only handle so much of Amy's new size. Her pussy ached in satisfied exhaustion, still loose from la...

Bovine-X

by sexgundam666 on Sep 19, 2017
Fetish

Author's Note: Okay, this one is literally just for shits and giggles. I will be writing sequels, but they too will be short and quick, however I will try to make them sweet as well. Warning: In later chapters there will be absurd breast expansion, futanari, extreme amounts of cum and lactation and anything else my messed up mind can conjure. Don't forget to...

Des vacances qui tournent mal

by zbloutch on Jul 31, 2019
Fantasy

L’aéroport de Roissy était bondé en ce début d’été. Les vacanciers se bousculaient comme si leur vie dépendait de leur présence dans leur avion avant le départ de ce dernier. De temps en temps, une voix monocorde faisait une annonce dans un micro, dominant quelques instants le désordre ambiant. Des groupes se formaient et se séparaient. Les milliers de gens...

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Doctor Thickenstein

by TitusMoorhead on Oct 6, 2020
Sci-Fi & Fantasy

"You're sure this is safe?" Jason asked, shivering as another layer of the frigid gel was slathered over his exposed backside. Victor took his time working the chemical into the other man's taut, solid cheeks. "Safe...ish. We've talked about this...I'm confident the process won't be fatal, but beyond that, no promises." "Is there a reason I can't be doing...

Justine Ch. 01

by SuperVC10 on Oct 15, 2017
Erotic Couplings

Justine Thorsendottir was in Munich for Oktoberfest '74. The genetically gifted buxom blonde superwoman from Southern California with sexual power on par with a W53 nuclear warhead drank beer, and sang along with equally sloshed partiers. She wore a pretty brau-haus outfit tailor made for her exquisite body. Her ensemble was a red and black dirndl, off white...

A Marvellous Draconic resurgence.

by Drake G. Reaper on Oct 14, 2019
Fan Fiction

In a hidden cave system a group of elderly men and women have gathered for a meeting a few coughing obviously there health is not doing to well. One of them holding a golden staff with a dragon encircling it approaches. "I welcome you all though it saddens me to see fewer and fewer of us everytime we gather that is why I propose a new plan." The Gr...

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(Don't Have to) Twist My Arm

by mistyfdfa on Sep 16, 2017
Sci-Fi & Fantasy

The following story about a switch in a poly relationship contains alchemical potions that causes several kinds of growth. If you are not into women growing thick penises or becoming quite muscular, this story is probably not for you. ***** Yuuki woke to the feeling of her ear lobe being nibbled on as thick fingers toyed with her nipple. From how much bigg...

Drug Trials Ch. 07.5: The Missing Pills

by Grobnar on Aug 21, 2018
Celebrities & Fan Fiction

Hello there! Another Drug Trials minisode. This one is off the rails of sorts, but I enjoyed writing it. Contains: futa, breast expansion, ass expansion, giantess, etc. Everyone is over 18, comments and feedback are of course welcome. Enjoy! *** Halle Berry dropped the bag of pills in the passenger seat slightly perturbed. All she wanted was her meds, bu...

Kelly's Experiment

by Go2daWest on Sep 28, 2020
Sci-Fi & Fantasy

Oi! Gotta nyew one fer ya! There probably won't be anything new for a while once this comes out since this is the end of my backlog, but I'm working on stuff! Contains: A female (mad) scientist, some giant baps, a complete disregard for actual scientific theory. (All characters are fictional, only characters 18+ perform sexual activities) ----------------...