Japan. Many people often wanted to visit this country for one reason or another. Mark was lucky enough to be able to not just be able to visit Japan, but to study there as well. He had taken Japanese as a secondary language to study in college. In truth, Mark was actually quite terrible at the language, and he did absolutely terrible in class, but taking the class in the first place was what gave him an excuse to go visit Japan to 'better understand their language and culture' according to him when he asked his parents for the money which they provided for him.

Mark was an average Caucasian man, although the place he rented out was anything but. He wanted an 'authentic Japanese house', and his parents were happy to provide. He was clearly spoiled, but he didn't care. His house was an old style Japanese housing in what was the 'suburbs' of Japan. His house was an off white, and inside it was designed to be fairly simplistic with not too much furniture, with the exception of his room where he kept his expensive computer, his huge bed, his giant television, and many other things.

A Japanese textbook sat on Mark's bed, but he didn't care to read it. He just watched television until he heard a knock at his door. Mark then got up, made his way to the door, and opened it up to see there was a Japanese woman on the other side.

The woman was Mark's tutor, and while she looked as if she had just gotten out of high school, truth is she was well into her 20s, but she kept very good care of her body. "Hello there. Are you Mark?" she said in English with surprisingly good fluency.

Mark nodded with a huge grin on his face. "Yes, I take it you're the one who's going to help me learn?" He had gotten a call from his parents earlier about how they hired a tutor to help him in addition to sending him to the country. The woman looked to be about his age, shorter than him by about a foot, and while she had a small chest, he didn't complain about it.

"Yes. My name is Kasai Yuka, but you may call me Kasai." The woman gently bowed to him and removed her shoes before she entered his house. She carried a small bag with her, which she set upon the coffee table in his living room. "Now, how much Japanese do you understand?"

"Oh, I don't know." Mark closed the door behind Kasai, and just kept smiling at her. "I might just need a refresher on the basics, just you know, to jog my memory." Even he knew he could have worded that better, but he didn't care. If he was able to get a Japanese girlfriend, then as far as he was concerned he didn't need to learn a single bit of the language.

Kasai took a seat on one of the small chairs in front of the short table near the television. She let out a sigh as she took out her book. "Very well, let us start with the most important word you can learn. The word is Konnichiwa."

"Gesundheit." Mark smirked at Kasai with crossed arms.

Kasai grimaced up at Mark. She could immediately tell exactly what he knew it meant, but she felt as if she had to say it aloud anyways. "It means hello, or good afternoon. There are some words that have multiple meanings."

"Oh, all of those multiple meanings are going to make me so confused." Mark feigned fright, but he was quite terrible at it. He put his hands over his mouth briefly before he uncovered it. "How do you say 'I want to take you to dinner' in Japanese?" Mark's fake look of terror turned into a real look of a huge grin.

Kasai closed her eyes with a frown, and she took a deep breath. She mumbled something that sounded akin to "Baka." Before she opened her eyes back up. "Are you going to take these lessons seriously, or are you just going to learn this language to try to spread your seed worldwide?"

"Hey, hey, hey!" Mark raised his hands and shook both his hands, and his head. "I'm not in it for the sex! I mean, a foreign girlfriend in Japan would make life here a lot easier, but I'm not trying to start some kind of wild and crazy harem." Mark leaned closer to Kasai. "Unless...?" he reached an arm to her.

Kasai quickly jumped back and shouted in Japanese. Mark didn't understand it, but the language was akin to what one might say when swearing another person out. It took a good minute for her to calm down, but she still looked at Mark angrily. "We are going to have to take extreme measures if you wish to learn Japanese. Are you willing to do this?"

Mark wondered what Kasai had in mind for such measures. He could only imagine it would involve her though, and the thought made him smile. He wasn't sure HOW it was going to involve her, but in either way so long as it did, he'd be happy. "Oh, absolutely, I'll do whatever it takes to learn Japanese."

Kasai nodded to Mark. She reached forward with her index finger, and touched the top of Mark's head. She pressed firmly on his head, and a sudden shock was sent through her finger and into Mark's head.

Mark was the one that jumped back this time. It felt like he had just been struck with a massive static shock. "ACK! What the hell?!" Mark rubbed his forehead. He expected to feel a bruise or a bump, yet he felt nothing but his bare forehead. "What the hell was that? Some kind of magic trick gag?"

"Something like that." Kasai responded with a sudden soft smile. "You wish to learn the language of Japanese. This little...skill will allow you to do it, but there is a cost. I am sure you will be more than happy to take it though."

"What is this skill you're giving me Yuka-san?" Mark was curious, but then he realized what he had just said. He had not only referred to her by last name, but he included san too. He wasn't even sure if it was correct in Japanese, but it wasn't something he meant to say either way that worried him.

Kasai's smile widened. "You will be soon speaking Japanese so fluently that it will feel like it's your first language!"

Mark scratched his head, but as he did, he paused. His hair felt strange. He stroked down his head and, while he couldn't see it due to a lack of mirror, his hair was definitely longer and smoother. The hair went down just to his shoulders, and it felt as if it had been very well maintained, unlike his previous hair. "Nani?" he asked, although as he heard himself speak, he wasn't even sure what he said. "What did I just say?"

"Yes! That is EXACTLY what you just said." Kasai giggled at his confusion. "You will find things really weird, and you might not even be able to understand yourself, but I can understand you perfectly. Give it time and you'll be able to understand yourself soon enough."

Mark started to get just as angry as he was confused. He wasn't sure what was going on, but he could tell Kasai was behind this. He shouted, but his shouts sounded like that of a Japanese teenager, and completely in Japanese as well.

"Mark! Language! I realize you don't even understand what you're saying, but even I understood THAT!" Kasai looked insulted. "Men! This is something we MUST deal with!"

"I don't even know what I said!" Mark shouted with a hint of an accent to his voice. He was getting worried now too. His hair felt strange, and his voice was incredibly bizarre. He not only alternated between English and Japanese, but his voice sounded higher too.

"Yes, well, I'm not going to repeat what you said." Kasai looked at Mark with furrowed brows. "If you really want to know what's going on with you, why don't you look at your reflection in the bathroom?"

Mark let out a frustrated huff, but he knew he was going to get no answers from Kasai. He heaved himself up, and made his way to the bathroom. With the exception of the toilet which had been turned into a bidet, the bathroom was very normal for what one might expect. Mark glanced at himself in the mirror, and noticed his hair wasn't just long and silky, but also pitch black. It would have looked off for the rest of his body, but his skin looked paler too, as if he weren't entirely Caucasian, but a mixture of that, and...
"Japanese..." he said to himself.

Mark ran out of the bathroom with a grimace on his face. He glared angrily at Kasai, and stomped his sock covered foot. "What are you doing to me?!" his stomp felt much weaker than even he expected, as if his very muscles were being reduced slowly.

"I already explained it to you Mark, you will be speaking Japanese very fluently soon, but it comes at a cost." She slightly bowed her head. "Now you're free to do exactly as you wish, and you'll soon look like you belong in this country!" Even Kasai's 'L's in her speech were perfect. Her own speech was perfect English.

"I don't WANT to look rike I belong in this country!" Mark paused as his own English sounded a bit off. He was raised on the English language. Heck, he never hung around foreign people, or people that spoke the language other than English. Mark wasn't sure what he should do. Part of him wanted to attack her, but physical violence was unlikely to fix his issue.

"Oh come on, you get to experience the wonders of Japan! You'll even have memories of Japan, as if you've always been here." Kasai smirked. "Tell me, how long have you been here again?"

It felt like a stupid question to ask. Mark's heart pounded with adrenaline, yet Kasai was asking him questions about how long he had been there. He wondered what that even had to do with him changing anyways. "One year." He said with confidence. At least, he swore it had been a year. It was a little hard to tell. He remembered picking up on some of the language as he stayed there, but he still wasn't very good at it, mainly because he didn't put forth the effort to try to be good at it.

"Has it really?" Kasai asked with an innocent smile. "Don't you think it's been longer?"

Mark wasn't sure what Kasai was getting at. He tried to remember how long he had really been in Japan. Had it been a year? He looked down at his skin as it looked more like it would fit in with Japan easily. Maybe he had been there longer, and not just for learning Japanese, but living there. "...three years?" he asked, but he wasn't even sure about that. He knew he said one year not a moment ago, he swore he had memories of living back at home a few years ago, but those were hard to remember. He had better memories of living in Japan than he did where he used to live. He couldn't even remember the country he used to live in.

"Oh, I think it's MUCH longer than that. But you're pretty slow." Kasai giggled. "Not that I judge. You're just...taking a little bit longer to learn a foreign language, but you're trying. Surely you know a decent amount of it by now though, especially after being here for five years."

"F-five years?" Mark swore he said one year not that long ago, and now that jumped up to five years? He couldn't have been trying to learn Japanese during those five years, at least all of them. He opened his mouth to speak Japanese, and he found himself speaking somewhat fluently, as a person that took Japanese as a second language. He wasn't the best at it, but the words he spoke out of his mouth were difficult for him to even describe, so much so that once he finished his sentence, he added at the end. "I don't even know what I said!"

"You said 'I don't really think I can speak Japanese. I don't even think I've been here for five years." Kasai giggled. "At least, that's a rough translation. Language is a complex barrier, especially when you're trying to compare it to English."

Mark felt as if that sentence alone both made no sense, and perfect sense. He couldn't describe the mixture of feelings he felt when he heard her talk. There was also something else about Kasai when she spoke. It was a little difficult to even understand what she said. There was no doubt that Mark heard everything she said, he just couldn't understand it perfectly, as if even English was proving a little harder to comprehend. "What...you...say?" Mark spoke slowly in an accent that sounded broken.

"There are some words in English that aren't in Japanese." Kasai spoke plainly. "Translations are not easy." She added.

Mark understood Kasai's words now, but only when Kasai spoke slowly. He couldn't believe how strange it was that he found it harder to understand English. He tried to recall his life years ago when he spoke English, but the line between when he spoke English, and when he spoke Japanese blurred together. He tried to say he knew what Kasai said, but he ended up speaking it in Japanese, but he barely understood what he said again. He knew what he wanted to say though, so he assumed he at least said that.

"I did have to change a few things around with you in order for you to understand Japanese better though." Kasai shrugged. "Mainly, you having a life in Japan. Nothing makes it easier to learn a language like growing up around it! You'll have some problems speaking English, but hey..." Kasai giggled. "I can help teach you that!"

Mark started to get furious again. He found it harder and harder to remember his life where he used to live, and a much easier time in Japan. He remembered going not to just college in Japan, but high school, middle school, he practically lived in Japan! His skin was a mixture of skin, and his eyes became slightly slit. He yelled at Kasai how he knew she was doing something and he wanted to be changed back, but the words were again in Japanese. He understood himself a bit better than before, but he could only pick up a little bit of what he even said to her. It was so bizarre that he couldn't understand what he said, but he still knew what he said as he had to think about it before he shouted it.
"I don't need to learn English! I need to learn Japanese!" he shouted, but in the Japanese language, and nearly perfectly at that. Of course his wording wasn't exactly like he had tried to shout, but close.

"Oh?" Kasai spoke English in response. "You're talking very good Japanese, but your English is absolutely horrible. I bet you can barely understand a word I'm saying!"

Mark heard her speak. Like before, the difficulty wasn't the inability to hear. He could pick up everything she said just fine, but he didn't understand much of anything she had said. "Are you mocking me?!" he shouted in Japanese. His voice had a hint of a feminine tone to it, but he was too furious with how his English vocabulary vanished bit by bit.

"I'm not mocking you, I'm making alterations. Just look at you, you're so fluent in Japanese, and you look very much like a Japanese femboy too! So cute and totally adorbs!" she just kept laughing. "Don't worry, I'll keep on making changes! I'm thinking you can be my sister. How old are you? Eh, doesn't matter. I can change that too."

"You can't change me into your sister!" Mark backed away from Kasai with frightened eyes. He was ready to attack her at first, but now he was afraid about what she was doing. He couldn't remember his life outside of Japan no matter how hard he focused. Instead he had memories of going to Kasai for English lessons, and he knew those memories were a lie. He couldn't explain why they were a lie, but he just knew they had to be.

"Oh, but I already am." Kasai snapped her fingers. "Why, even our very house is changing. You couldn't make it on your own, so I let you live with me, because I'm such a good big sister."

Mark looked around the living room. Everything looked the same from his perspective, but as he turned his head to look at the different walls, he swore things had changed. Did I always live in a tall building? He thought to himself as he was now able to look around the city he now lived in. There were two leather recliners side by side, and Mark just instinctively knew which one was his. They were in front of one single lone television, but they didn’t spend a lot of time together in the living room anyways, not unless it was to play video games together.

"Recognize where you live now?" Kasai made her way to the large window. "Third floor in a 20 story building, mom and dad help us pay for this so long as ONE of us is in college. A shame you're not the one in it, but hey, your work at the gas station kind of helps pay for things."

Mark didn't think he had a job, but it wasn't long before he could see an open door from their living room that led to his bedroom, and a partially open closet door revealed a work uniform. While Mark couldn't see the uniform very well from where he was standing, he could tell the uniform was way too small for his body.

"Now, we should really work on changing your body. I'm thinking...well you're still in college, but younger than me...how does the age of 20 work for you? Good? I think it's good. You don't even have to change that much because you're already matured."

Mark felt his body change and shift. His skin had already changed into the perfect tone color for Japanese. His body took on feminine curves and tones, gentle at first, but his hips flared out slightly, as did his chest and ass while his waist pulled in. He was by no means sexy, but he definitely had the feminine tones where they were needed. Even his face was softer, and when he told her to stop with a tear down his eye, it was in a woman's voice that sounded very Japanese. Mark didn't even care at this point. He understood what he said now. He wasn't sure how he knew how he understood, just that he did. He blamed the new life memories on that, from birth until present, he lived a life of a Japanese woman, with the exception of one minor detail between his legs.

"Now, these changes haven't been very arousing for you, have they?" Kasai grimaced at Mark. "Well, we'll have to make it up later, but not together! We're sisters after all." Kasai's grimace turned back into a smile. "So, change up that thing between your legs, grow out your tits, and let's make you a woman!"

Mark heard Kasai, and while it sounded like some silly order, his body complied. He suddenly squeezed his thighs together as he felt a strange sensation that was incredibly hard to describe accurately. It felt as if someone had grabbed onto his cock and balls. The sensation was arousing, but at the same time, he could feel his testicles being pushed inside of him by this invisible force. His cock suddenly spurt out a bit of cum, the last of his manhood, and as it did, his shaft was reduced to nothing but a small nub of a clit.

Mark's cock and balls vanished entirely between his legs, replaced by a feminine slit that was slightly aroused thanks to the transformation. His, now HER tits grew outward to a B cup.

Mark's now completely female body was by no means impressive, but for a Japanese woman in her college years, she looked perfect. She stared down at her body in shock, and then she looked up at Kasai angrily. She wasn't sure what to do at this point. Part of her was ready to run, but another part was ready to just attack her, even if she did now think of her as her sister.

Kasai nodded at Mark, just now a few inches taller than her. "Physically changed? Check. Mentally? Check. Now, I'd love for you to slowly lose what's left of Mark bit by bit until nothing but Karm remains in a sort of loving corrupting sister way, but we don't have the time for that. So when I snap my fingers, you will be Karm. Nothing will be left of Mark." With that, Kasai snapped her fingers.

Karm blinked rapidly after the finger snap. It felt as if she had just woken up from a crazy dream, a dream where she used to be not Japanese, but some man from another country. She thought something was off, she could tell something was off, but she couldn't quite put her delicate finger on what. She decided to ignore her thoughts how something felt strange and just sit on her recliner near Kasai. "Are we going to start my English lessons soon?" she asked, curiously in Japanese.

Kasai giggled. "Oh yes, we certainly are, but first we have GOT to fix your clothes!"

Karm looked down at her clothes. Her shirt was now so baggy it covered her crotch, and her pants had a lot of problems staying held up without her helping it. "Hah, of course sis!" Karm replied happily. She loved to go clothes shopping with her sister!

...even if she couldn't remember much about the city she lived in for some reason.