You sit with Michael on the couch, watching one of his shows while browsing your social media. It’s been a while since you moved in with him, the two of you ultimately deciding that splitting rent makes more sense than having two different places. Sometimes Michael didn’t bother you for the rent though, and in those months you had to be extra nice…

Not that there’s anything wrong with that, Michael’s the sweetest. You love his personality, but you long for his body. In more ways than one; you love caressing his muscles with your delicate fingers, but to be a man has always been your dream.

“What do you think of the show?” Michael asks, suddenly interrupting your thoughts.

“I don’t know, kinda boring…” You trail off and continue scrolling, exhausted from a long day of work as you cuddle with your boyfriend.

That’s when an ad pops up on your feed, describing a device that swaps people’s genders. You haphazardly laugh about it, gauging Michael’s reaction to assess his willingness as he pauses the show.

“Oh cool, I got the same ad earlier today. It’s like some type of app supposedly, and both people need it. Doesn’t really make sense, cuz how would they do the swap with no Carbonium? Maybe there’s some in the phone? I don’t know…” Michael trails off, unpausing the tv as you download the app.

You never learnt how these transformations work and Michael seems pretty knowledgeable, but why not try the app out? It downloads quickly and opens up, immediately alerting you to one contact in your phone with the app; Michael. You send him a joke request, and feel his phone vibrate against your stomach. He ignores the alert, your body too much of an obstacle for him to check a random alert.

Suddenly you feel something lightly hit your head, and looking up at Michael you could see he now has hair down to his lap. Wait, did you… Is this…

Michael doesn’t notice, just watching his show as you feel his muscles deteriorate beneath you. His body loses bulk, and Michael’s skin softens as he shrinks to about your size. You hear him moan slightly as his voice loses its timbre, slowly rising in pitch till it’s decidedly female.

When the sound of his voice hits his ears, Michael jumps up in surprise. You’re thrown into the floor, but feel less pain than you expect. Michael runs to the bedroom, saying something about nausea and being lightheaded. You follow behind, surprised to see John writhing in bed nude as his body slims even further. You feel a rush of arousal as he flips over, his ass jiggling as it rounds out and shapes into a bubble.

Michael’s hips bend and stretch, giving him feminine curves that lead into a throbbing bulge. He hides under the covers in shame, whimpering in discomfort as he convulses and moans. You know you should be helpful and give him space, but a new curiosity and crassness overwhelm you. You slip under the covers, laughing as Michael screams in an increasingly younger and feminine voice.

You just watch as his hands fail to hide his new bottom half, thighs thickening and pressing together as his stomach tightens. You remove your tightening panties and shimmy them up Michael’s legs, pulling them up his waist as his erection strains the skimpy underwear. Your own legs start to writhe in arousal as you watch Michael erection shrivel, no longer stretching his panties to their ripping point.

You smile and slip a hand into his fitted panties, causing Michael to squeal as your finger gets vacuumed into him. Having his member invert must feel like a lot, but your finger penetrating him too? When you finally get your finger out it’s covered in juices, and you lick the delicious sauce before coming out from under the covers.

“What’s going on, babe?” Michael asks dreamily, eyes struggling to focus on as you look around the room.

It’s much smaller than you remember, and wasn’t Michael the same size as you before? You now tower over the petite beauty, at least a foot taller than you had been previously.

Michael’s blonde hair now appears to be dyed, brunnette roots showing as she seductively sucks on her manicured finger. A new hunger you don’t recognize builds as she flutters her eyelashes, and you feel your own thighs begin to thicken. Your quads strengthen as the muscle bulks up, and you feel a bulge in your folds as Michael sits up in bed.

Her panties bunch up around her thighs, eliciting a gasp from Michael as her wet pussy hits the open air for the first time. You suddenly feel something long and hard protrude through your leaking womanhood, and Michael stares at it as she digs her fingers deep into her pussy.

Your veiny shaft throbs with arousal as blood vigorously flows to the head, making it grow even larger as Michael moans. She begs for your thickness, her intoxicating voice echoing in your ears as she cries out.

The app!

You quickly pull your phone out as Michael starts crawling toward you, and you open the app in hopes of canceling and even reversing the transformations.

The app just has a loading screen, with no explanation besides a third-filled progress bar. You slap your forehead in exasperation, not expecting your hand to be so big and strong. Only now do you notice you ripped through your shirt, now standing taller than even Michael had as a man.

Your boobs lost all their fat, now muscular pectorals that are even bigger than before. You feel your glute muscles expand as the desire to thrust gives your hips new movement, and you feel a lot less graceful as you grab at your pulsating boner.

“O man, It feels so good…

But we can’t have sex, we don’t know what could happen! I don’t want this change to be permanent…” You trail off, noticing Michael’s nipples beginning to get bigger.

Fat then starts to pour into her breasts, making them swell as you squeeze your hungry cock. Michael collapses in the bed, her teeth just missing your member as she lays face down still on her knees. Her boobs hang and sway, ballooning as her pussy drips down her tummy and up her chin.

She moans and wriggles her hips as her entire body plumps up slightly, and you quickly pick her from choking on the stream of cum flowing into her mouth. Your lust-filled cravings cease momentarily as you see the love of your life in discomfort, but then you remember that you’re both nude and your new manhood is pressed against her plush right butt cheek.

Michael’s feet suddenly hit the floor, and she angles her hips to impale herself on your stiff erection. She cries out blissfully as her wet folds guide their way around your cock, tightly squeezing it as she floats weightlessly in your arms. You squeeze her swelling breasts as she rides your member, gushing cum into your lap and onto the floor.

It only takes a few more thrust before Michael is completely melting in your arms, blasts of vaginal secretion massaging your cock as you get ready to finish. You always heard sex was so good as a woman, but this is ten times better! Then again, Michael never had such a good time before this…

Her inflating boobs separate your fingers, making them more difficult and more pleasurable to play with. Michael’s sensitivity seems to just increase as her boobs grow, easily dwarfing your old ones and even making you a bit jealous somehow…

You hover on the brink of climax, basking in the feeling as Michael’s first orgasm settles down. She relaxes her hips for a brief moment before you explode inside her, causing an ear piercing shriek of euphoria to fill the room. Her body seems to shatter as she shakes and folds, inhaling your orgasm as you just continue to thrust.

The sex lasts for hours, and only stops when you both fall asleep in a puddle of sweat and discharge. You wake up to the sound of running water, feeling sobered and no longer in heat as you look around the room for Michael. You quickly check the app to see a big warning, ‘Sex will make the changes permanent, you agreed to this possibility when you started using the app’.

It doesn’t bother you for a second though, and you know Michael will feel the same. You’ll have to spend a lot of time teaching each other about the other side of life, but that would just get the two of you closer! Knowing Michael she’s probably rubbing one out right now, thinking about you in the shower…

Two weeks later, and Michelle’s already preparing for pool parties.

“It’s so much harder being a woman! You barely have to know anything from my old life, but I have to learn every minute of your day! And what’s with this shawl? I don’t like this thing…” Michelle complains, slumping her back as she tries not to look at the crotch of your tight board shorts.

“Hey, I thought we were filming something for your new accounts? Stop moping, and start strutting!

Keep your back straight, and swing your hips a bit more… That’s it, one foot in front of the other!” You laugh, coaching Michelle as she smiles uncomfortably and pulls at her silky shawl.

Hopefully more practice and time in that body will help, cuz with a body like that neither of you will have to work once she gets enough followers. And Michelle’s been talking about bringing another couple into the bed, so you need her on her A game to attract the sexiest one.