The Locker room
Ashe looks up at him and witnesses his muscles rippling. growing. throbbing all over, andy was increasing in muscle mass before her very eyes. his back bent over and thickened. his legs throbbed and thickened.
Paradigm Rift [TSR]
His eyes had clamped shut as he let his fingers roam around his blossoming bulk, experiencing his muscle fibres tearing and repairing themselves in an instant without needing to see them.
Atop the Food Chain [PTRN]
One of the first things that legoshi realized was that, despite there not actually being any muscle present, the leviathan rod was strong as hell, giving him trouble as he tried his damndest to angle the tip towards his mouth.
Paradigm Rift [PTRN]
Each one of his globes had grown heavy with delicious muscle mass, easily able to outweigh what he used to when small.
Under The Moon
Novra's body bulged and thickened with power, muscles filling up every spot. the straps began to stretch even more under the constant pressure of the feline's swelling muscles.
Filling the Nest [COM]
It took some teasing before he was allowed access between the other man's muscled cheeks where he found that delicate ring of muscle winking at his impending entrance.
Swoleverse: Manual
Something more catered towards the lovers of big muscles and maybe a tiny bit of muscle growth introduction:- an all-male world inhabited by hunky, buff men of various races and sizes, from lean and fit to hulking massive.
Get Your Pump On [COM]
The tensing muscle mass jostling him around elicited a loud moan out of him as he comprehended just how strong his friend really was.
Rare Candy Addiction [TSR]
His prodigious chest complemented arms with corded muscle like steel cable, easily able to lift the front of his car should something roll under it.
Infinite Storage [PTRN]
Growing big enough to cover multiple city blocks with muscles practically in his face and strong enough to move mountains? he loved it, and would easily say it was the best thing that had ever happened to him.
The Power of Belief [PTRN]
Every deep breath brought about another pulse of growth, his muscles involuntarily flexing bigger as it happened.
Rocketing Up in Size Ch. 2 [PTRN]
They'd end up as galactic, muscle-bound titans and he wouldn't have it any other way.