Muscle Grow Stories

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Stories of changing sizes, growing bigger or shrinking smaller

by masterfulmastus on Dec 20, 2020
Fetish

This is a branching series with a focus on transformations or size changes in stories. Predominantly growing and expanding in some way, but also including shrinking, size draining, size transfer, and any other size play related fun. Size changes can happen any number of ways depending on the path you choose and who is growing and changing. Random growth spur...

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Megan Ch. 09

by djubre666 on Sep 14, 2017
Fetish

Chapter 9 -- THE GYM It was barely noon on the first day of the weekend, and I was already scarcely standing on my feet thanks to the intensive lovemaking sessions with my new girlfriend. I was currently sitting on a couch watching her pull on her training clothes. Although too tired to move I couldn't help responding to the sight of Megan's 8'4" amazonia...

A New World Pt. 01 - Preface

by Newworldfuta on Nov 4, 2019
Fetish

Preface: ( I have a few stories in mind that i will be writing. This preface is an explanation of the universe/ world/ timeline that they occur. While its not entirely necessary to the reader to read this before or after reading any of my stories, it is helpful to me to establish and maintain continuity etc. ) The year is 2040, the world is a different pla...

The Futanarium Experiment Ch. 03

by Spaul1360 on Feb 10, 2020
Sci-Fi & Fantasy

Chapter 3: The Roommate Amy was a math prodigy. At 23, she was already working on the highest levels of theoretical math, the kind that would be used in quantum physics. She loved her work, and it helped distract her from the fact that she was short, slightly overweight, and didn't attract much attention from boys. Her Asian features were the best thing she...

Little Liz's Big Suprise

by danny222 on Aug 8, 2020
Fetish

Liz woke up this morning feeling a little horny, which wasn't normal, but this was even different from the rare occasions that she actually did feel horny. It was a little stronger, but with Liz having a medical condition that continued her puberty she was getting used to unfamiliar feelings, so she wasn't too alarmed, just curious. Puberty as it turns out t...

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Liam and I: Anal Love

by AnalLover2501 on Sep 13, 2017
Anal

I lay in his bed, stripped of all my clothes, my wrists are tied together against one of his bed posts. My eyes are blindfolded and my mouth gagged. I can feel the muscle relaxant I had taken half an hour before begin to take effect. I'm lying on my stomach, waiting for him to return. I want him to hurry up and get back, I don't want to wait. I'm horny and...

(Don't Have to) Keep Me Growing

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

This is a continuation of (Don't Have to) Twist my Arm and the transformations get more absurd as Yuuki and Caroline take more of the potion. So, if absurd growth and size is not your thing, I would go back. ***** While crafting a serum to help with recovery after a workout Yuuki unintentionally created something that dramatically increased one's masculine...

How to Make the Most of a Workout

by BOSTONFICTIONWRITER on Sep 16, 2017
How To

Ah, yes, spring is in the air. The birds are singing, the sun is shining, and the women are dieting to fit in their itsy bitsy bikini. It's time to get rid of that bulky sweatshirt and head for the beach. You can't? Why not? My God, your gut is huge. If you weren't a man, I would have thought you were pregnant. How the Hell much weight did you gain over th...

A Piece of Art Pt. 04

by Hurradiegams666 on Jul 13, 2020
Fetish

WARNING: This chapter includes the following "kinks": futa x female, female muscle, FMG, growth, dick growth, expansion, size difference, muscle worship, mini-gts, height growth, hyper sizes, mind control, cum inflation, cock weightlifting, sexual workouts ALL CHARACTERS ARE 18+ AND OLDER! Varvara's heart was pounding in her chest when she sunk into Christ...

Tropical Extacy

by talldanish on Sep 14, 2017
Erotic Couplings

Hiking in the jungle in Brazil, not far from a little bungalow by the river we start to get caught in the rain. I've been behind you for about an hour or so just fascinated by that wonderful ass of yours swinging back and forth and distracting me from the scenery around us. The rain starts coming down and you turn around to say that we should head back. I se...