HMC
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🕑 Added 2025-09-03 12:19:31 +0000 UTCI noticed everyone showed a lot more interest in Grandpa’s story than I expected, so I decided to dive into a side story about the grandson. I hope you enjoy reading it as much as I enjoyed writing it.
Morning sunlight streamed through the window. I’m a gym rat, hitting the weights every day. The thrill of feeling my muscles grow stronger keeps me coming back to the gym. My build is average, but I’m steadily working to bulk up through consistent effort. I’m also big into supplements and nutrition, always scouring reviews and trying out new products whenever they hit the market. Then, by chance, I got an opportunity to test a new supplement. A pharmaceutical company was offering free samples to a select few—how could I pass that up? When the package arrived, my heart raced with excitement. “If this works, it’s gonna be huge,” I thought as I opened it.
Inside was a small bottle with a few pills and a simple instruction sheet. It promised “muscle growth and energy enhancement.” No mention of side effects, just a note to take one pill a day. I swallowed one with a gulp of water. It had a slightly bitter taste, but the anticipation was stronger. Then… a few minutes later, my body started heating up. A sudden, intense rush of pleasure hit me, and my libido went through the roof. “Ugh… what the hell is this…” I groaned, unable to hold back. My body felt like it was on fire as my muscles began to swell. My thighs twitched and bulged first, veins popping out vividly against my skin. My biceps hardened, stretching the sleeves of my hoodie tight. My chest and back felt heavier, my whole body growing dense. I used to weigh around 80kg, but now it felt like I was pushing 150kg of pure muscle. Down below… my cock twitched and grew to the size of my thigh. Precum started leaking, warm and sticky, soaking the inside of my jeans. “Ohh… I’ve never felt an orgasm like this…” My body trembled as moans escaped me. My cock pulsed, and then, WHOOSH! A massive load of cum shot out, like a fire hose, soaking the floor and splattering the walls.
I tried to catch my breath, but that was just the first wave. Another surge of heat roared through me, even more intense this time. “Ugh… again…!” I groaned as my muscles exploded with growth. My chest ballooned like a mountain, ripping my hoodie to shreds. My back flared into a wide V-shape, and my shoulders broadened like a double-wide door, veins bulging prominently. My thighs and arms thickened further, and my weight must’ve shot past 300kg, a hulking mass of muscle. Every step made the floor quake. And my cock… the gradual growth turned explosive. From thigh-sized, it swelled to the size of a telephone pole. When it got hard, it was so massive that the tip hovered just above my head. Precum gushed out, and in that overwhelming size, I groaned, “Ugh… I can’t hold it…!” My cock pulsed a few times, and then, WHOOSH! Another massive load of cum erupted, like a fire hose again, turning the room into a complete mess.
This body’s been causing me some serious problems. Every morning, I grip my massive cock, slick with precum, and stroke it roughly. As the pleasure surges, I mutter to myself, “This cock… it feels so damn good…” Load after load shoots out, and I moan, “Nngh… the cum just won’t stop…” At the peak, I shout, “My cock… my cock’s cumming!!” I have to jerk off dozens of times just to tame my libido enough to leave the house. Leg day is the worst. After squats or leg presses, my sex drive goes berserk, and I can’t even make it home without relieving myself. I slip into the alley behind the gym, pull out my monstrous cock, and jerk off about five times just to calm down enough to head home. “God… this huge cock and these muscles… what if someone sees me… I’m scared of getting caught…” I mutter, but deep down, a twisted thrill creeps in. The thought of someone secretly watching, the idea of this perverse play, it turns me on even more. Even when I get home, the urge doesn’t stop. I have to jerk off dozens more times, stroking until my hands ache, cum soaking the floor as I whisper to myself, “Nngh… I want to keep going…” I’m exhausted, but seeing my muscles grow makes it impossible to stop.
[Pharma Executive’s Monologue]
In a dimly lit office, test data flickers on the monitor. I lean back in my chair, a smirk spreading across my face. “This trial’s been quite a success. The results are far more intense than we predicted. Muscle growth rates, hormone levels, even the side effects… the data’s perfect. These guys have no idea what they’ve swallowed.” I flip through the files, murmuring, “Time to pick the next target.”
Comments
Brawnophile
I'd love to volunteer to be the next target, btw 💪🏽🍆💊
Brawnophile
Glad you showed us how the Grandson grew Huge! Awesome story and awesome images. I love how big he got and how outrageously horny he grew. I'd never be able to keep my hands off of my cock if I was that massive, just like him.
