“And that’s it! My last mission, completed flawlessly as ever!”



Tace fell backwards onto her king-sized bed in her penthouse apartment in Tokyo, her long ponytail splayed out over the luxurious mattress as she laid back still in her “work clothes”, a dark grey bodysuit with a kimono-esque top layer giving a bit of Japanese style and a traditional ninja look to her otherwise simple outfit. She unzipped it down to her mid-chest to give herself some breathing room, and anybody who joked that she barely had anything to let out would have ended up on the receiving end of her kunai hidden in various pockets of her so-called ninja uniform.

Sweat glistened on her slight but still perky B-cups, having grown out slightly over the years from her initial A-cup. She’d climbed up the outside of her apartment building just for the hell of it, and although she still considered herself to be at her physical peak, but that it seemed a little more effort than when she’d been a fresh-faced ninja in her early twenties. Inconveniences or mistakes so minor that nobody but herself might notice them, but by her perfectionist standards she was ashamed to let a single one slip. Approaching her thirty-fifth year, Tace had decided to go out on top and retire to enjoy the immense wealth she’d built up over the years.

“Twelve years, huh?” Tace sighed, barely a crease on her mature face to show for it, leaving her an ideal beauty at the peak of physical health who could have convinced anybody she was still twenty, with her sharp eyes, flawlessly smooth skin, and traditional Japanese beauty. Yet here she was, almost thirty-five, and she’d achieved just about every feat she possibly could in her long, illustrious career as a ninja. She’d started off as a high-speed courier, then moved to handling more sensitive packages, and from there, driven by a desire to live the life of a true traditional ninja, had delved deeper and deeper into the underworld, taking on missions ranging from assassinating VIPs to protecting them from the shadows. Anybody who scoffed at the idea of a true ninja in the modern age was quickly swayed by her very real skills, and so she’d gone through life mostly uncontested, as there were few who could keep up with her overwhelming skills.

It was an amazing life, fantastical even, and yet ironically Tace remained unaware of her life’s most magical element: the fact that she’d once been an ordinary young man transformed into the ideal ninja by a mysterious self-help guide. It had altered not only the body and mind of the young man but also provided her with the facilities needed to become a true ninja, ranging from equipment to the ingredients for making smoke bombs and poisons courtesy of a convenient great-uncle who seemed to hail from a long ninja lineage, not that she’d ever met another one in her life.

“Sucks to be the only ninja in the business. What’s the point in going out on top if there’s nobody to sit on the throne after I’m gone?” She lamented. Perhaps owing to her image as a strong, silent type, she had a habit of mumbling to herself in private. “Would have been nice to fight somebody on equal footing at least once, or at least have some work buddies. All I ever get to work with are baldies in suits…”

Tace swung herself back up, the slightly below average woman pacing around her apartment, not one to laze around. The big question was, now what? She’d made the choice to retire, yet she’d focused mostly on performing her best in her final days. Although she was slightly ashamed to admit it, Tace didn’t exactly have much of a personal life, throwing herself into her work and mostly focusing on simple relaxation when she was off the clock. Onsens, beauty treatments, showing off her parkour to the youngsters, that sort of thing. Despite her unbeatable looks she’d never found love, simply never finding the right guy or girl over the years, and even if she did, her ninja pride meant that she could never live a conventional family life.

She didn’t quite regret it and felt that it might have been too late to start dating and eventually have a child, but she did feel sad that she never got a chance to have a successor

“But where am I gonna find one of those?” She thought, opening her fridge and pouring herself some sake. “Kids love ninjas, but finding somebody who wants to be an assassin in this day and age and has the talents I’m looking for is like looking for a needle in a mile of hay. It’d be faster to make one myself!”

Tace paused mid-sip. Make one… Who said she couldn’t? Her uncle’s basement had a number of mysterious potions, several of which were supposedly for increasing the clan’s numbers. She’d never paid much attention to them despite their fantastical promises, most likely due to her disinterest in being more than a solo operation, and also because she’d soon moved out for work-related purposes. She’d been all over the place, although with how many houses and hotels she’d stayed in, nothing soothed her heart more than a traditional Japanese home.

“Modern high-class is nice and all, but it just doesn’t compare to a good futon.” Tace decided. While she hadn’t planned out too much of her life, she’d already resolved to retire to the countryside, somewhere in a traditional village where she could take it slow and simply enjoy her retirement. She’d had fantasies of moving into a ninja village where she could train the next generation, but naturally things like that didn’t exist. But perhaps, with a few potions and her immense built-up wealth, she could make her fantasies a reality…

–

“Alright, that’s three days. That potion isn’t going to get any better than this, if the instructions aren’t lying to me” Tace said, squinting at the vials lined up on the wall in her new home’s basement. She’d sold her fancy Tokyo apartment, gathered up everything in her uncle’s house as well as her various tools and souvenirs from across the years, and moved out to a nice rural town in the countryside. The only thing she hadn’t done was introduce herself to the neighbours, who were convinced that she’d yet to actually move into her house yet. A little bit of extra fun, concealing herself for days, but also because Tace didn’t want them to recognise her before she’d spruced herself up a little.

“Elixir of beautiful kunoichi, it says.” Tace said, what little remained of her common sense urging her not to believe in the claims her uncle’s guides said. Yet the poisons it listed had been an effective as their claims, and the potions had had miraculous effects. She had no reason to doubt this one either, save for that its effects went well beyond healing or hurting.

“Oh, to hell with it.” Tace decided to trust her instincts, popped the top, and drained the first vial in one go. For a ninja, the idea of drinking sketchy substances barely qualified as a risk. Besides, she’d built up an immunity to half the poisons on the planet by now, what was the worst it could do to her?



Tace soon began to feel a building pressure in her chest, and her lips curled into an uncontrollable smile as she quickly tore off the loose-fitting t-shirt she’d been wearing, stripping off her jeans just to be safe. She might have been a ninja, but even she got lazy with her fashion when nobody was around to see it. Truth be told, testing this potion on herself hadn’t really been necessary. She was already a beautiful kunoichi after all, but after reading the potion’s specifications and its description of the ideal female ninja it would create, it had immediately jabbed her right in the insecurities.

Beautiful, slender, and with a face that could stop hearts and a height that was agreeable to the average Japanese man, Tace seemingly had it all. Everything except big boobs! She’s spent most of her career with A-cups that barely registered on the average man’s radar, and her hips, while pleasingly curvy, weren’t exactly turning heads based on their own merits. Her small, perky butt was perfect for squeezing through tight spaces, but sometimes a girl wanted to show off what she had, right? And Tace didn’t have a whole lot!



Therefore, when the potion had described the ideal kunoichi as one who was immensely strong, perfectly stealthy, and had the body to seduce any red-blooded man, she felt that if she was going to be a mentor to other ninjas she should be able to lead by example. Seduction hadn’t exactly been he biggest talent, after all.

Thankfully, Tace wouldn’t have to wait long before the potion kicked in. Her diminutive bra was already starting to feel tight, and she could feel a fire in her chest as her body kicked into overdrive. She let out a low moan as pleasure filled her body, wondering exactly how the combination of chemicals the guide has described could have such a rapid reaction. The answer of course was magic, as there were forces far beyond the play of the common chemicals she had mixed together. Somebody had wanted Tace to become a true ninja, and now they wanted her to proliferate. She would perhaps never know the why, but was currently enjoying the benefits of the how.

Tace watched her bra fill out and her cleavage slowly expand, going from barely a line to an increasing valley that she could have easily slipped a kunai into for safekeeping. She was just starting to feel short of breath when her bra’s strap gave up the ghost, snapping as the woefully inadequate garment fell to the floor, destined to go straight from there to the garbage. She licked her lips as she covered her now puffy nipples with her palms, feeling her breasts fill out until her small hands could barely cup them.

Regrettably, the growth eventually began to slow, with Tace’s new breasts falling at a large and quite healthy D-cup. She perhaps could have gone even bigger, but the bountiful cleavage and pillowy orbs she’d gained were a good compromise between sexiness and actually being able to maintain her balance on a mission. Tace of course would adjust to her new proportions in a matter of days, but it was likely she’d get herself jammed in tight spaces for a few weeks while she got used to it, had she still been working.

Next, the potion seemed to finish travelling down her body, and she felt her panties start to slowly ride up her ass as her cheeks began to slowly but surely inflate as well. Her perky butt began to wobble as Tace breathed heavily, her training keeping her from making too much noise as she gasped and moaned, clutching her ass cheeks as they too quickly grew well out of the reach of her fingertips. There was a cracking sound as her hipbones widened, Tace filling out an hourglass figure as her hips grew beyond the width of her shoulders, gaining a perfect bubble butt that rocked and bounced with each step as she stumbled towards the mirror she had set up just for this.

“Looking good, gorgeous. Flat? Couldn’t be me.” Tace purred inbetween breaths as she felt the grow come to an end, striking a pose and pushing her hip out to the side as she admired herself in the tall mirror she’d prepared just for this occasion. If she’d had a body like this before, she’d have barely had to use her ninja talents to get one over most men! She turned around and bent over, pushing her ass closer to the mirror It was so big, and so round! Her panties had completely vanished up her ass crack, the waistband on the verge of snapping for every second she exploited it to show off her newfound sexiness. But it clung on for dear life, and she ignored the discomfort both for her own pleasure and because she was pretty sure nothing else she owned would fit her either.

“...I probably should have bought new clothes before I did this.” Tace realised, facepalming as her huge breasts wobbled from the motion. It looked like she was going to be in hiding for a couple more days while she waited for the deliveryman to arrive with something that’d maintain her decency…

–

“Well, I guess that’s everything.” David said, glumly watching the various couples cheerfully wandering around the tourist hotspot he was taking a break in. “Now what?” 

David, an American tourist at the end of his second day in Kyoto, had already found himself exhausting all of the locations he’d planned out for his trip. It was amazing how much ground you could cover when your girlfriend dumped you two weeks before your big anniversary trip. This whole thing had been her idea to begin with, but their relationship had rapidly deteriorated despite his attempts to make things up to her, and now all that was left was a spare plane ticket he hadn’t been able to refund and a lot of hastily made calls to the hotels and inns he’d made bookings at. 

It wasn’t like he hadn’t still enjoyed himself, but being practically the only non-local who wasn’t attached at the hip to their boyfriend or girlfriend made him feel like he stood out like a sore thumb, and ti wasn’t just his pale complexion or bald spot that accentuated that feeling. It was a shame that he wasn’t deep into Japanese culture or at the very least watched too much anime like most of the single guys who made trips alone, at least according to the stereotypes, or he might have known what to do other than hit up the big sights that were absolutely crawling with tourists.

“Guess I’ll get a drink.” He shrugged, his default fallback for when he wasn’t sure what to do next. If there was one thing he could rely on Japan for, it was cheap alcohol, and lots of it. He’d drink himself silly and then perhaps visit that festival he knew was on tonight, and then go home and drink some more and try to figure out what to do on the last two days of his trip. Maybe go back to Tokyo for another day, or perhaps he’d just mill about Kyoto exploring. Whatever got his mind off of women for a bit…

Little did he know there was a suspicious, busty woman carefully blended into the crowd around him who had been keeping tabs on him for the last day. Tourist, single, male, and most of all he looked unhappy with the current state of his life. The perfect test subject for Tace’s grand plan…

–

“Mind if I sit here?”

David looked in slight disbelief at the beautiful Japanese woman who planted herself down next to him at the bar, speaking fluent, only lightly accented English.

“Um, sure, knock yourself out.” He said, shifting uncomfortably in his seat as the woman flashed him a heartstopping smile. He wasn’t sure where to look: her gorgeous face, or the cleavage she was flashing in that low-cut top. She was wearing a tight outfit with a pencil skirt, enough to get the heart racing, but not enough to look trashy either. Her long, smooth hair was done up in a ponytail for a casual look, and she crossed her legs as she immediately made at home.

“It’s my first time in Kyoto.” She said conversationally, putting David off with how quickly she seemed to have settled herself in. “Are you a local?”



“Me? Of course not.” The idea forced a laugh out of him. “Just visiting. You can probably tell, on account of the, you know.”



“You never know these days.” She smiled. “But I guessed. Kyoto certainly is big, isn’t it?”

“Not compared to Tokyo.” He laughed. “Not that I’ve been there for more than a day. I’m just your run of the mill tourist, unfortunately. You from Tokyo?”

“The countryside. I’ve only been to Tokyo a few times, it’s a bit too noisy for my tastes. I’d hoped Kyoto would be a bit quieter, but these days there’s so many tourists. No offence, of course..” She said, then her eyes widened a little. “Oh, I’m not taking up the space you were saving for your girlfriend, am I?”

“What made you think that?” He asked incredulously.

“Well, I didn’t think that a handsome man like you would be here all on your lonesome.” She said, and what surprised him the most was that nothing on her face said that she was being any less than genuine. Perhaps she was just a bit of an airhead?

“For better or worse, I’m single. That’s a limited time offer, of course..” He said, feeling foolish even as she giggled at it.

Handsome, huh? He hadn’t heard that since his hairline started receding in his mid-twenties, now on the verge of giving up the ghost with a couple more years to go before he hit thirty. The slightly shlubby tourist puffed himself up a little as she began to chat with him, asking him how his trip had gone. Perhaps he was just a novelty to her, a woman from the country who seemed to be younger than him but had a particularly mature air despite that, but he’d be lying if he said he wasn’t quickly enchanted by the beautiful, flirtatious woman.

“By the way…” She said, delicately handling her glass with her cheeks slightly flushed. “Need a partner for the festival? My friends bailed on me, and I hate going to this sort of thing on my own. That’s a limited time offer, of course.”



Empowered by a few drinks, 

“Well, I suppose I don’t have anything better to do…”



“Then it’s a date!” She giggled, holding his hand, David noting how smooth and small hers was compared to him. It was no wonder such a small woman felt more comfortable with a large man at her side if only to ward off any inevitable playboys. He downed the rest of his drink in one shot as she wandered off after arranging a time and place for them to meet. There was a good chance that he was being set up, but who cared if she was stringing him along, anyway? He may as well live a little while he was here and see where this went…

–

To his shock, she actually turned up at the festival, clad in a beautiful kimono that nonetheless managed to show off a very non-traditional amount of cleavage. She wrapped herself around him arm without hesitation, taking the initiative as she showed him around the place and they had what was nothing short of an ideal evening together. She checked out the stands, watched the fireworks, and then at the end, she asked him if he wanted to accompany her home after they hit up another bar.

David, smitten by this point and not caring if he was taking a risk, happily accepted, figuring if there were any last minute red flags, he’d come up with an excuse to take off. A few drinks later he was somewhat less prepared to recognise red flags

“Hey, I thought we were going back to your place?” He slurred slightly, feeling a little off-kilter as she dragged him into a somewhat gaudy looking building that called itself a hotel, but wasn’t like one he recognised before.

“Just one little extra stop first.” She said with a hungry look on her face, and David no longer cared what happened next. 

“Hold on,” he said, groaning a little as he sat on the end of the bed in the low mood lighting, his strange feeling intensifying. “I think I might have had too much to drink…”

“Let’s get this off first.” She smiled, helping him take off his shirt and slide off his jeans. She wanted a good look at what was going to happen next, after discreetly adding a healthy dose of her potion to his drink. She’d been worried it might start to kick in too soon, but luckily they’d made it out of sight first.

If David had been able to see himself in a mirror he’d have remarked at how good his hair looked all of a sudden, his chestnut brown hair looking rather full, his receding hairline having vanished and his bald spot filled out. It was short enough to begin with that he didn’t notice as it began to tickle his forehead, and was soon to be the least of his concerns.

He frowned as he looked down at his puffy chest, which had what appeared to be an embarrassing set of man-boobs. His weight wasn’t that bad, was it? He didn’t have a gut to match either, it being surprisingly flat relative to the size of his chest. Even his waist was looking very thin… too thin. He knew he was a bit over his preferred weight, so why did he suddenly look so skinny?



He didn’t have much time to think before he let out a surprisingly high-pitched yelp as his burgeoning chest suddenly blew up like balloons, heaving forward and jiggling as the remaining hair faded from his body, leaving him with two distinctly jiggly C-cups that soon blew up into DD-cups. His head feeling light, he curiously wrapped his hand around them, feeling a tingle of pleasure as he touched the thick, hard nipples that he now sported. For a moment he could squeeze nearly all of them with his hands, only for his hands to shrink before his eyes, becoming smaller, thinner, smoother, and slender, with long nails that rapidly grew out as the rest of them diminished.

His eyes rolled back in his head before he could truly process the changes, falling back onto the bed as he occasionally writhed as his changes progressed, letting out a low moan as the bulge in his underwear diminished, then vanished entirely, leaving an obvious camel toe as his expanding ass pushed into the mattress and pulled his underwear tight. His hips kept going with a loud crack like Tace’s had when they expanded while his legs and torso shortened a few inches until he took had a thick hourglass, a couple of inches wider than Tace and a few inches taller.

His body hair faded entirely across his body leaving her with thick, supple legs that had just a hint of muscle definition, leaving him with a completely feminine figure atop a face that was halfway between feminine and masculine. That didn’t last long as his square jaw narrowed and tapered off, his eyes turning brown as he, or she blinked a few times, her eyes narrowing as her complexion turned slightly duskier, her facial features shifting as she gained a cute button nose and plump lips along with a distinctly Japanese appearance. Her now shiny black hair had grown out to nearly teach the small of her back, and its slight curliness had given way to pure straight waves. For all appearances David was now a beautiful Japanese woman with a stunning figure, and as far as she was concerned that was all she had ever been.

“Huh? Master, where are we?” Dana mumbled, looking into the eyes of her beloved master. She felt a bit fuzzy at the moment, but felt a deep sense of loyalty towards the woman who, as far as she could remember, had taught her everything she knew about being a ninja. She could barely remember  anything before that, and after the vow she had taken, she considered her life to be lived anew after renouncing her original identity. That was the backstory the potion had prepared for her, and the one that she could live unquestioningly for the rest of her days.

“We were just celebrating your induction ceremony.” Tace said, the one hole in her plan being that she wasn’t quite sure how her first fellow ninja would react post-transformation.



“In a place like this?” She said skeptically. “Master, you have some poor taste.”



“I just wanted to see how you’d react.” Tace laughed. “Shall we head back to the village?”



“After we went all this way to a love hotel? I’m not leaving until I get my money’s worth.” Dana purred, wrapping her arms around Tace’s shoulders as she began to undo her kimono. It seemed that she’d kept her crush on Tace, intensified by her false memories of years spent with Tace as her master. Tace thought about it for a moment, then shrugged. Why complain when there was a beautiful naked woman right before her raring to go? She may very well have a new master of seduction before her eyes. Although, if the whole village ended up being like this after they were transformed, that might end up being a hassle too…