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The First Catalyst [A Man to Woman Sci-Fi TG] - Part 1
🕑 Added 2025-06-20 09:04:23 +0000 UTCCommissioned by Cooolooo
Titan's first colony is in trouble. After a catastrophic failure forced one of the two ships to turn back, the scientists devise an unexpected solution to the colony's population problem: half the men will be transformed into women.
When Zach receives the letter announcing his best friend's transformation, he’s faced with a choice: to let his best friend become a woman, or protect him by taking it himself. He chooses the latter. Struggling to adapt to his new identity, he’s torn between keeping his manly, protective nature intact and hiding his transformation from Alex.
Part 1
Zach snuggled deep into the blankets of the bed. It had been so long since she’d felt proper fabric against her skin, no spaceship cryo bed, no sleeping bag in the temporary shelter, this was a real bed. Thanks to the hard work of their robots, they finally had a house, and that meant a real room, with real sheets. It was a heavenly way to wake up. So heavenly, in fact, that she barely registered that something was different until she rolled onto her chest and felt a distinct lack of pressure between her legs.
All at once, Zach was wide awake. Her eyes snapped open, but she stayed perfectly still and took stock of her body. It felt mostly the same, the only change was that absence between her legs. Slowly, she rolled onto her back and reached a hand down to cup her crotch; smooth. She could feel the mound of neat, curly hair under her thin boxers, but there was no cock and balls.
“Guess I’m a woman now…” She whispered to herself, pressing her fingers against her new sex curiously; it was so soft and warm.
It was funny, Zach had expected to feel…something. Confliction, emasculation, shame, anything really. It wasn't every day a man lost his manhood, but she was surprisingly unbothered by it. Maybe it was the fact she did this for Alex, so that made it worth it. There were worse fates than being secretly female; besides, the rest of her was the same as ever.
She moved her hand up and down her body, feeling the same thick arms and legs as always, her chest was perfectly flat and masculine, and there was a touch of stubble on her chin. This was going to be easier to hide than she thought.
A knock at the door echoed through the room, and Alex called out.
“Hey, are you awake?”
“Yeah, sorry, just enjoying having a proper bed again!”
“It’s great, isn't it?”
Alex stuck his head in, and Zach was very glad for the thick, warm blankets that hid her lack of bulge.
“Could you go inspect the fence? The drones finished laying it last night, so I figure we should put the call out for the cattle to be delivered, what do you think?”
“Sounds good! Fresh milk would be the best.”
“I know.” Alex sighed, “I can’t wait to eat real food again instead of ration bars. Speaking of, here, I made you breakfast.”
Alex tossed the silver bar onto the bed, and Zach laughed.
“Aw, my favourite flavour! Pure protein and carbs! How thoughtful.”
“Yeah, well, if you’re lucky for dinner, we can have…more pure protein and carbs.”
Zach stood up and stretched, her baggy boxers hid the only change so far, it felt oddly exciting to be so brazen. She bit into the ration bar and sighed, it wasn't the worst taste in the world, but after months it was starting to wear thin.
“If you could have any food, what would it be?” Alex asked suddenly.
“Hmmm, pasta. The kind with cheese sauce and herbs, like your mum made on Earth.”
“God, that was so good.” Alex moaned.
Zach had practically lived at Alex’s house growing up, she was one of seven brothers, a middle child, not too bright or talented. She naturally shrank into the background, no matter how big she got. Getting even a second of her parents' attention had been impossible, but Alex’s mum always had time for a smile and to give her an extra helping of food. Just another thing she owed Alex for.
Suddenly, Alex’s eyes brightened and he grinned to himself and whipped out his data pad to click away.
“Oooh, I know that look, what’s the new idea?”
“It’s a surprise,” Alex muttered, his tongue sticking out of the side of his mouth.
Zach just shook her head and laughed as her friend turned and walked out without another word; there was no point trying to pry whatever the surprise was out of Alex, when he wanted to, he was a steel trap.
“Well, good luck with it!” She called down the hall before quickly finishing her breakfast and getting changed.
She stole a quick glance at her mound as she pulled up her new pants. It was a little odd not to feel her balls hanging down, but she’d get used to it. It was strange how normal today felt; she and Alex had their usual banter, now they were off to do their normal duties, it was like nothing had changed. Idly, she wondered how long that would last.
~
For a few days, Zach’s transformation seemed to still. Maybe something was happening on the inside but on the outside, aside from her new pussy, she was the same as ever. After a week, though, she sleepily leaned against the sink, razor in hand, and realised she didn’t need to shave. She ran a hand over her cheeks and felt the skin there, still smooth from yesterday's shave. It was the same the day after, and the day after that.
“Huh, guess I won’t need you anymore…” She shrugged, leaning down to put the razor away before hesitating.
This time, she ran her palm over her legs; they had changed shape, it was subtle, so subtle nobody would notice unless they looked closely, but Zach could feel it. The waistband of her pants were slightly tighter at the hips, the leg slightly looser, and the hair there felt odd and itchy in a way it never had before. She turned the razor over in her hand.
“It’s too cold for shorts…it’s not like Alex would see.”
How different could shaving a leg be from shaving a face? With some difficulty, she positioned herself on the floor and slathered her leg in shaving cream before dragging the razor along. It took a while, and several reapplications of cream, but finally all the hair from both legs was gone.
Zach smiled and stretched them out; the itch was gone, and they felt so smooth to the touch. She found herself stroking up and down, now able to fully appreciate the subtle curve to her new calves and thighs.
“Zach? Are you okay? You've been in there a while.”
Shit!
“Uh! Yeah, I’m fine!”
Zach rushed to pull her pants back on and marvelled at how strange the fabric felt against her new smooth skin. She had just enough time to hide herself when Alex opened the door with a look of concern.
“Just uh, having some tummy trouble.” Zach lied quickly, and Alex frowned.
“You didn’t try eating some of the grain, did you? I told you it needs to be processed first. And your stomach needs time to adjust from ration packs.”
Zach wanted to sing Alex’s praise to the Heavens; even when he didn’t realise it, he gave her the answers she needed.
“Heh, you got me! My bad.”
“Zach.” He scolded, “Come on.”
“I’m better now, lesson learned!”
She held up her hand defensively and scooted for the door. “I should probably get to work!”
She was just about to escape when she heard Alex mutter under his breath.
“Alright…huh. That’s weird.”
Her blood froze, had he noticed something, heart pounding she turned expecting to see him looking at her but instead he was holding the can of shaving cream.
“I swore this has more in it.” He muttered. “We’ll have to be careful, I doubt they’ll be producing shaving cream for a while.”
Oh. Zach hadn't thought about that.
“Sorry.”
“It’s fine,” Alex smiled, “maybe we’ll both go for the rugged, wilderness look for a while. Then again, it takes me so long to grow hair that by the time I have any sort of beard, yours will be on the ground.”
“Heh, yeah…”
Zach swallowed and quickly headed out of the house. Maybe she needed to be more careful. Alex was smart, all he’d need were a few more clues to realise something else was going on.
Zach made her way down to the barn and hefted open the door, and was met with the braying of their new cattle. Thanks to the drones constantly fertilising the soil, they now had several fields ready for grazing.
It would be a few more weeks before the cows would start to produce milk, and in a few months' time, they could even start a breeding program to keep up the population and start producing meat as well. Zach’s mouth watered at the thought; milk, cream, cheese, meat…so many things that she hadn’t had in months. Not to mention the grain and other plants they were growing on the other side of the ranch.
“Alrighty, girls and guys, let’s get to grazing!” She called, throwing open the back of the barn so they could be herded out into the first field. “I can’t believe I came all the way to Titan to be a farmer.”
“You do a pretty good job, though!”
Alex waved from his spot on the fence.
“I thought I’d come keep you company while you got them fed, I have a drone monitoring their growth.”
Alex indicated to the little robot worker hovering over the herd. Then he paused and brightened a bit.
“Look, is that a drone from Homebase?”
Zach felt her blood freeze for the second time that day. Alex was right, it was just a little silver dot in the sky, but as it got closer, there was no doubt, it was the same drone that had come the other day. What if it had notes or information about the transformation? She couldn’t let Alex see it!
“I’ll get it!” She cried, rushing off down the field and waving madly, “Hey! Drone, down here! Here!”
Thankfully, it responded and gently hovered down to stop in front of her. This time, it simply produced a data pad before disappearing back into the sky. With a flick, the screen lit up and Zach breathed a sigh of relief to see it was just a production schedule for them to follow. Alex’s footsteps reached her ears just as she spotted another folder.
TRANSFORMATION EXPECTATIONS
“Shit!” She whispered.
That file was probably full of information about her change, she couldn’t risk Alex seeing it. In a panic, she quickly hit the delete button just as he appeared at her side.
“What’s wrong?”
“It’s… this schedule, it’s pretty intense!”
Alex’s eyes narrowed, dammit, she was so bad at lying!
“Is there something going on, Zach?” Alex asked quietly, “If something went wrong and you don’t want me to know-”
“No, it’s nothing like that!”
“So there is something.”
Crap! Zach thought fast.
“No, there isn’t. I’m just…going a little stir crazy out here by ourselves. That’s all, I was hoping this would be something more personal.”
“Oh, yeah, I guess just having one other person around is a little boring.” Alex’s shoulders slumped slightly. “I wonder how things would be if we had the full team as planned.”
This was going wrong. Zach bit her cheek.
“That came out wrong, you know you’re great, Alex, I could never get sick of you! I just meant, there are no movies, no other people and the robots aren’t great at conversation.”
Alex smiled a little, and Zach’s heart fluttered; the last thing she wanted was to upset him.
“Yeah, I get what you mean. Why don’t we go stargazing once the ranch is fully operational?”
“Star gazing?”
Why did that make a funny knot appear in her stomach?
“Yeah, it’s the only thing I can think of until we get some proper entertainment out here. I know it’s lame-”
“No! It’s a great idea! Stars are…cool.”
All of a sudden, her palms were sweaty and her tongue felt dry. Was this one of those side effects the article would have told her about? Maybe she should have tried to hide and download it later rather than straight up deleting it. A loud moo made them both jump and they spun around to see one of the cows with its head stuck in the fence.
“Goddammit!”
Zach ran over and wrapped her strong arms around the beast's head and pulled till it came free, narrowly avoiding its hooves as the spooked animal flailed and ran back to join its herd.
“Zach! Are you alright?”
She picked herself up off the ground and dusted off her jeans.
“Yeah, fine.”
“That was so stupid! What if that cow had kicked you? Or fallen on you!?”
Alex’s face was red, and it made Zach’s chest ache. She hated seeing him so worried. She slapped a strong hand on her shoulder and squeezed it.
“I’m fine! See? No harm done, don’t worry about what could have happened.”
Alex continued to grumble as he turned around and buried himself in his datapad while Zach laughed. That ache in her chest wouldn’t go away though. In fact, it seemed to be spreading, a strange, tender feeling right across her chest. She rubbed at the skin there and felt it give slightly; it was soft and pliable in a way her chest never had been before.
“Hm, this might be a little harder to hide…”
~
Back on Earth, Zach had loved old movies. Despite being a large, bulky jock type on the outside the truth was she’d always had a soft spot for chick flicks. They didn't get made much these days, but once, while trawling online, she’d found a database of old ones and watched them over and over. One of them was about a woman pretending to be her twin brother so she could play soccer. It was a bit weird, but Zach was grateful she’d been so obsessed back as a teen. Without ever knowing it, that film had been the perfect preparation she needed in the coming weeks as her body started to change more.
After that first sign of tenderness, she knew it was only a matter of time before she started to fill out. The first week of having breasts, they were easy enough to hide with a big jumper, and thanks to the cool weather, Alex never questioned why she’d taken to wearing a puffer inside. As they grew to full A cups and quickly started heading for Bs, though, she needed to improvise, which is where the old movie came in. In that, the woman had wrapped bandages around her chest to squash her breasts down. With a little bit of effort, she’d managed to make herself a binder from some older clothes and each morning wrapped it around as many times as she could to flatten her chest.
It was getting a lot harder as time went on, though. She could feel the skin straining against her wrap as she heaved open the heavy barn doors each day, and hefted the feed for the cows and filled their water troughs. When the day finally came to an end, it was such a relief to lock the door behind her and remove it.
“Ah, finally I can breathe…” She sighed as she removed the sweat-coated wrap and winced.
“I’m going to have to wash this, gross.”
It was bound so tightly around her skin each day that it was impossible to ignore. With a sigh of relief, she let her new breasts hang free; crushing them every day was starting to take its toll. The tender skin was pink, and she rubbed at it absentmindedly, trying to get rid of the soreness. As she stripped off, Zach noticed how much her body had changed in other subtle ways; her breasts really brought out the feminine side of everything. Now, dressed in nothing but her underwear, she could see the widening of her hips and slight slope to her shoulders.
“I wish I had a mirror…” She mused for a moment before clicking her fingers and rushing over to where her personal datapad was. It wasn’t perfect, but it did have a camera function. Zach carefully balanced the pad on the dresser and switched on the camera before taking a few steps back.
She studied the person looking back at her carefully. It was still her, the subtle changes could be covered by clothing, except the breasts, of course. She cupped them both thoughtfully, letting them rise then fall. She got a good handful of skin now, enough to play with. Her nipples had darkened and grown too.
Curiously, she pinched one lightly and shivered. Before, her nipples had been mostly useless little stubs, now they were full of sensation. Zach rolled her fingers back and forth, making little sparks of pleasure shoot through her body and down to her core. Heat began to build there, and she felt something start to burn, a need. She swallowed nervously and stopped. It had only been a few seconds, but those touches had been enough to light a fire inside her.
A shiver ran down Zach’s spine, and that heat continued to grow. Slowly, a finger came to brush against the front of her mound before slowly parting it. The pad of her finger pressed against the bundle of nerves that was her clit and she jumped at the intensity. For a moment, she was curious; what would it feel like to do that again and tweak her nipples at the same time? Gently, she took her nipple in the other hand and did just that, a pleasured gasp escaped her mouth before she could stop it. It felt good, but almost too good; it was so different to touching herself as a man. She swallowed nervously and withdrew her hand before slowly dressing for bed.
Pleasure still tingled between her legs, but she ignored it. Somehow, it all seemed too much at the moment. She needed more time to come to terms with things before she started exploring like that. Still, her nipples remained diamond hard and it took quite a long time for sleep to come.
