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February 3, 2026

Ch.5 Lectures on "TSF Syndrome", Focusing on Health and Physical Education

After changing clothes, we moved to another location.

The place we arrived at is a place that looks like a school classroom.

In terms of image, it might be close to a university.

"Okay, from here on, it's going to be a fun, fun lecture. That said, I've already told you about half of it, so I'll keep it light."

"That would be helpful."

I want to sleep early after all.

"The things we talk about here are often related to the law, but... well, it's not that serious. It's simple."

"You say 'tis a law, but what is it exactly?"

"Simply put, it's about gender stuff."

"That is blatant."

"It can't be helped. That's just how it is. Well, let me explain. First, the basics. I think you've become a beautiful girl now, Mahiro-kun."

"Umu, that it is."

For now, I am a beautiful girl... Probably.

Well, this is my ideal after all.

Although, I feel like other people's impressions might be different.

"So, the question is, what do you think your gender is in legal terms?"

"Mu? Is it... a woman?"

"Too bad, that's not right."

"So are you saying I am a man?"

"That's not right either."

...I have no idea what she means.

If I am neither male nor female...

"Am I gay?"

"That's wrong too. The correct answer is 'TS'."

"...What kind of stupid gender is that?"

"It can't be helped. The person who decided this was the Prime Minister at the time the TSF syndrome was first reported."

...That Prime Minister must be an otaku.

Especially the type of otaku who enjoyed TS.

"This gender is pretty special."

"That it is. Just the name makes it unique."

"That's true, but... that's not it. This gender has certain advantages."

"Advantages?"

"Yes. The advantage is that... you can marry anyone you want."

"...That would mean everyone from babies to the elderly."

"Not that way, it's about the gender, the gender."

"Ah, that way... Mu? So that means I can marry either a man or a woman?"

"That's it. For example, you may look like a girl on the outside, but inside you're a man, right? So, if I asked you if you wanted to marry an ordinary man, you'd say no, right?"

"No, I do not really mind either way noja..."

Personally, I do not care about the gender of the person I like.

"...Normally, that would be the case."

"That it is."

"...Mahiro-kun, you seem to be getting a bit out of sorts."

Kami looks tired for some reason.

I'm sure her job is tough...how pitiful.

"You were definitely thinking of something unnecessary, weren't you?"

"Is it not just your imagination?"

"...Whatever. Anyway, normally, people wouldn't want to marry someone of the same sex, considering their true gender, right? That's why the government decided to allow it. Of course, TS couples can also marry each other."

"Hohou..."

That is a pretty interesting thing to think about.

Marriage is possible for all genders.

"Next, let's say you were molested on a train by a stranger in his 40s. Do you think you could sue that man?"

"Fumu... I guess I could?"

"Yes, that's correct. The reason is quite simple. The law is applied according to the body of the person who has undergone TS. So if a TS woman becomes a man and commits a sexual assault on a train, they will most likely be arrested."

That is normally how it works, is it not?

"However, molestation can be reported as soon as the other person feels uncomfortable, regardless of gender."

"Oh, is that so?"

That is a bit surprising.

"By the way, is there no room for leniency?"

"Well, there is. It would be cruel to arrest someone without any explanation, so there is a certain amount of flexibility. For example, if a woman develops the disease and then turns into a man and gets on the train, there are many cases where the emotions she had when she was a woman remain the same. There are mistakes, so... Well, if you go too far, you're out immediately, though."

"I guess so."

I do not believe there are many idiots like that.

"So, Mahiro-kun, be careful. You might get molested by a greasy old man with a heavy nose."

"Do not say such disgusting things! Just thinking about it already making me shiver!"

I am getting goosebumps right now.

"Hahaha. Sorry... Well, that's about it. Oh, by the way, if you have sex with an adult, they're out."

"I will not. I have no interest."

"Well, Mahiro-kun, it seems like you have an abnormally strong need for sleep. I don't think you need to worry about that."

Somehow, it feels like all we are talking about in this lecture is sex.

Is this really just a lecture on a disease? It feels like I am in a health and physical education class at school.

"Next. You're a girl now, so you'll have to assume that you're getting your period."

"Oh, so that would come after all."

I mean, that was pretty straightforward of her...

"Of course. After all, you can have children."

"...this has been a very graphic conversation, really."

"It can't be helped. That's just how it goes. By the way, this is the 10th time I've given a lecture on 'TSF Syndrome'. Everyone from the first to the 9th lectures were fascinated and took an incredible interest."

"...Is that okay?"

"Who knows? Isn't it fine, though? I think it's a matter of personal freedom whether that person lives a depraved life or not. I don't care if they're having sex all the time."

"That is really graphic and too explicit, my dear."

"This is the kind of lecture we do."

What kind of lecture is this noja?

...Well, I have made jokes like that with Kengo too, but that was just joking. In this case, she's not joking, she's saying it seriously, so I wonder why it feels even worse.

"But I can say this: honestly, periods are tough. In some cases, you might not be able to move, so be careful."

"...That would mean I can sleep even more!"

"Well, is that how it'd go? Normally."

"Mu? Is that not the case?"

"...Well, if that's what you want, that's fine. But I recommend buying some sanitary products beforehand. It's not uncommon to wake up in the morning and find yourself bleeding."

"...Doing laundry seems like a pain."

"Well, it can't be helped."

Girls are such a pain...

In that sense, men had it easy noja.

"But I don't know what will happen in your case."

"What do you mean?"

"Well, you may be 16, but your body looks like that of a 3rd or 4th grader. Normally, a woman has her first period by the age of 15, so I was wondering how it's gonna go."

"Sorry. Is this not just a health and physical education class?"

"Well, that's the way it is. By the way, when a woman develops TSF syndrome, I also examine him and give lectures."

"Have you ever been called a pervert?"

"No, not at all. In fact, women who have become men say things like, 'Oh, that's crazy, it makes me horny'."

"...The fact that you can say that so openly makes me think you are a pervert noja."

Is it okay to leave it to this woman?

Well, it will be fine, surely.

"Well, that's enough about me. More importantly, let's talk about you. We'll end the health and physical education class here. What's left to talk about is... ah, that's right. It's about everyday life."

"Is there something?"

"Well, first of all, the moment you signed that document, your family register has already been rewritten. Well, technically it hasn't been registered yet, but from today on your gender will essentially be 'TS'. Ah, the government will take care of the family register, so there's no problem. By this evening, the gender column on your family register will probably be rewritten to 'TS'."

What a special gender.

However...is this a gender that only exists in about 1,000 people in the world?

That has an exclusive feeling to it.

"Your ID will be sent to you by mail at a later date, so please keep it close to you at all times if possible."

"Got it. But why is that noja?"

"For people who have developed 'TSF Syndrome', it's like a lifeline. If you don't have it, it'll probably be a lot of trouble. Also, if you lose it, you won't be able to receive aid from the government. Well, it can be reissued, but it takes quite a while, so try not to lose it."

"I see. I get it."

This disease is surprisingly troublesome noja.

For now, the only good thing is that I can use the entertainment facilities.

"Also, don't worry about anything related to school. We'll keep them up to date."

"That would be helpful."

"Well, that's the kind of job it is....Well, I guess that's about it for the lectures. We've basically talked about everything we need to talk about."

"I see. So, is this the end?"

"Well, I guess so... Ah, there's just one thing."

"What is it noja?"

"I'd like your parents' contact information."

"Oh, now that you mention it, I did say that. Yes, here is their contact information noja."

"Thank you. We'll contact them later."

I am really grateful for all the support I receive.

It seems like they take good care of this part.

"Well, it's a card that serves as identification, but it also serves as an ATM card, so if you ever need one, you can use that."

"So that means I can use it however I want?"

"It's not wrong, but... it's better not to use it for personal gain. After all, it's paid for with tax money."

"I see. That certainly seems like I should better only use one if 'tis needed."

It comes from the people's hard-earned tax money, so wasting it means wasting the people's hard-earned tax money.

Apparently there is one idiot out there who built a shower room inside city hall.

I thought that was really stupid.

"For now, I think the monthly limit is about 150,000 yen."

"That is quite a sum ja."

"Well, I guess it is. It's a very unique disease, and they're being kept under special circumstances like supervision, so if we don't give that much, there's a risk of riots breaking out. But I think the entertainment facility we were at earlier will be enough."

That is certainly true.

I do think we are being given enough preferential treatment already.

Well, since there are still very few cases of this disease worldwide, I guess they want to do more research into it.

"Okay, this time the lecture is finally over."

"That was unexpectedly quick."

"Well, even though it's called lecture, it's really just a light one. There aren't any particular rules. I guess the only rule is not to use dangerous abilities carelessly. In Mahiro-kun's case, though, I don't think there's much to be worried about. If I had to say, it would be the ability of 'beastification'."

"Beastification?"

"Ah, beastification. It would be inconvenient if your ability didn't have a name, right? So I thought of something easy to call it. I don't have any sense for names, so I just made it up as I pleased. What's written here is the name, after all."

When I look at the paper she handed me, the name is indeed written on it.

"Growth-Regression," "Beastification," and "Color Change"

U~mu, she just call them as they are.

'Tis simple and easy to remember, I like it.

"That ability might even improve your physical abilities, after all. Anyway, those names will be registered in the ability database."

"Umu, I understand."

"Well then, let's dismiss. I have to do some research and prepare a chart of your test results. Oh, don't worry, a staff member will take you home."

"That would be helpful."

"Of course. Well then, be careful on your way home."

"Yes. Thank you for today, Kami."

"No problem... Ah, here's my contact information. If anything happens or you have any questions, just contact me. I'll help you."

"That would be very helpful. I am grateful, and will make use of it."

"Yeah, feel free to contact me. See you then."

With that, Kami left.

...Fumu. The surname Kami really does have an impact.

"God is leaving" sounds so cool.

I might be a little jealous.

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Comments (3)

L
Le Someperson · February 3, 2026

Thank you for the chapter. Will there be people looking to stroke her beastification ears and tails? "Who knows? Isn't fine, though? I think it's a matter of personal freedom whether that person lives a depraved life or not. I don't care if they're having sex all the time." Isn't fine, → Isn't it fine, "Well, is that how It'd go? Normally." It'd go? → it'd go?

S
Schione · February 3, 2026

Thank you! Your guess is as good as mine, as I only read what I translated 😅

A
Alexis · February 3, 2026

thanks for the chapter