#musclesex

I think that would be a great idea. Lucky for you, I've got my fair share of magic gym coaches that can whip you into shape! Let's take a look at you.

Ah, the usual: skinny, lanky, weak. I've taken the liberty of assigning a makeshift name to you: Jason. Don't worry about your size, though, I'll be sure to tighten up that baggy shirt of yours in no time. Now, meet your gym coach.

Meet Mr. Ford. He's inclined to flex, so don't put that against him. And don't feel intimidated, you'll be bigger than him before you know it. Now let's start your journey. You were minding your business on a normal school day when you suddenly got called down to your gym coach's office.

You walk into Mr. Ford's office, when you are met with a humid air. Looking at the beast of a man before you, however, it makes sense as the heat that must emanate off of that much mass must be an extreme amount.

"Mr. Ford?" You announce your presence, "You wanted to see me?"

"Jason," he responds. His baritone voice booming in the small office, "Yes, take a seat."

You sit across from him, taking in how his pecs strain against his shirt, his arms making his sleeves bulge close to tearing. You wonder how professional his outfit really is, given how revealing it is. You also notice a strange vial on his desk, with a murky liquid inside, but you brush it off as some peculiar decoration.

"You know, I've always seen great potential in you, Jason." Mr. Ford said as you took your seat.

"Am I in trouble?" You respond, confused about the situation.

"Quite the opposite, actually," he answered, "I see you in class all the time doing your best, striving for more. I'm always so dejected that your physique really hasn't responded."

There is a moment of silent confusion before you respond, "So what, are you trying to recruit me for the weight-lifting team or something? It's not like I've been trying to gain more muscle."

"That's perfectly normal," Mr. Ford announced kindly, "and I'm not trying to recruit you. I just want to know what you want, cause I can help you with that."

You look at his caring smile as you think about it. "Well... if you mean with my body, I have been wanting to get a little bigger. I just could never start."

You see a flicker in his eyes as he gets ready to respond, "You know, I think I have the perfect thing for you. A way to start." He reaches over to the vial you were curiously looking at and presents it to you, his muscles rippling with every movement. "Drink this. It's a supplement, of course, approved by all the boards that it needed to go through. It'll help you jumpstart what you want."

You reach for the vial, inspecting it and opening the lid. "Ok? I mean, if it's not harmful, I guess I could try it." You take a whiff, noting the sweet smell, before drinking it in one sip.

"I think you're going to be happy with that decision." Mr. Ford said with a laugh, leaning back in his chair and watching you.

Suddenly, you feel a warmth all around your body. You think you might be having an allergic reaction to the substance, so you are quickly alerted before settling down, the warmth accompanied by a pleasant feeling. You look at your hands feeling them plump up and grow into a manly pair. "What's going on?!" You exclaim.

"Just relax and enjoy the ride, Jason" Mr. Ford responded.

Veins start to appear along your arms as they swell up with muscle, moving from your forearms, to your biceps, and up to your shoulders. The sleeves on your shirt start to creak, unable to hold the new size. You feel the growth spread to your chest, causing your flat chest to quickly inflate, each pec swelling with each breath. Each pulse of growth you feel is a wave of pleasure, making you quietly moan and groan, your deepest fantasies becoming a reality.

Your traps rise as well, accompanied by your widening back, and a thickening neck, creating an imposing figure. Your spine grows in length, cracking and giving you a new towering height. Your upper body is swelling so much that you burst out of your shirt, revealing your completely transformed torso. Your abs are hit next, subtly carving out bricks in your midsection and giving you an insane v-line. You reach up to feel your face. Your jaw is reshaping, changing to a more masculine shape, even growing a slight stubble. Speaking of your hair, it's changed to a dark black, giving you an even more masculine look. You look down at your insanely inflated upper body with awe, flexing and feeling the mounds of muscle now over your body.

You aren't given much time as your lower body now catches up to the transformation. You grunt as you feel your quads swell with size, causing you to lean back in your chair from the intense growing pleasure. They stretch out your pants completely, leaving them tight. The back of your pants is not left out as your butt inflates with muscle, giving you an extremely round bubble butt. The growth moves down to your calves, giving you an incredible raindrop shape, straining your pant legs. The swelling of muscles in your lower body causes your pants to groan before eventually bursting off of you. You even feel your feet grow a few sizes, causing you to take off your shoes so you don't lose any more clothing. Your legs lengthen as well, adding to your imposing height, still swelling with muscle so as to not lose mass in the stretching process.

You pant wildly, hot from the intense transformation. But it is not done yet, as there is more to your growth. You feel the heat moving to your crotch, your member starting to rise from the pleasure of your transformation. However, it starts pulsing farther from where it would normally stop. You let out a moan, noting how your voice has dropped, matching the baritone of Mr. Ford. Your dick begins to grow along the length of your underwear, thickening and elongating, each pulse feeling like an orgasm. It grows so long that it begins to snake out of your clothing, revealing itself to the outside world. You reach down to rub your growing shaft coming out of your underwear, feeling it grow bigger and bigger. Reaching your knees fully hard. You feel an extra tightness in your balls as they begin to swell as well, creating a huge bulge in your crotch. This excess size in your reproductive organs, in turn, increases the production of testosterone in your body, leading to the last stage in your transformation.

The vial of liquid has completely transformed you, as if altering reality itself. On that note, you begin to age, mentally and physically, your body and face now gaining the look of a masculine man in his 20s. The increase in testosterone coursing through your body directly links to your sex drive, making you the most horny you've ever been. You look at your gym coach... no, your college football coach (how could you mix that up?) with a new desire, as if you've found prey that you must dominate. You catch yourself in coach's mirror first, causing you to worship yourself and your new body. You flex and revel in your new mass, a cocky smile spread across your face.

Mr. Ford looks at you with a lustful smile, "Now that's a transformation," his smile slowly fading as you turn to him, revealing your intentful eyes.

You slowly make your way to him and forcibly move his desk to the side with your newfound strength. "I think it's time I had a little fun with you, coach."

Mr. Ford looks up at you and smiles again, "It's like you read my mind," he responded as he moved towards you, feeling up your giant muscles.

You remove your underwear, letting your manhood spring to its full length. You turn Mr. Ford around, letting your dick tease his ass. "Do it. I'm ready." He exclaims, positioning himself. You begin to slowly push your dick into your coach's tight hole, feeling your cock pulse with need. You grab onto his pecs, feeling his masses of muscle as you thrust into him. Your slow thrusting soon turns into rapid movements as you feel yourself getting closer to the edge, your huge balls slapping against his legs. The extreme pleasure of the transformation, your hyper-sized dick, and the coach's tight ass is quickly getting you to a climax. Both of your moans increase in volume as this masculine fucking reaches its peak. With one last thrust, you explode in Mr. Ford, cum gushing out of your dick, and filling him up. The orgasm lasts for a solid full minute as you both shake in ecstasy. You pull yourself out from your coach and lean in for a passionate kiss, a thank you for the transformation.

"We should do this again sometime, " Mr. Ford proposes, still panting from the intense pounding.

"Oh, I think we will," You respond, standing over him with your dick rising once again.

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