Thank you, Koki. Well, there have been many things since then, I'm already 15 years old. Too much time? No, I know that it feels trivial! Rather, I was collecting information from about 5 years of age when I was able to act on my own initiative over 10 years. What a surprise, first of all, is the Japan time on Earth on the third planet of the solar system where I currently live ...

At 10:59 am on January 4, 2102.

I was born almost 90 years in the future from Japan where I was alive and before I was reincarnated. That doesn't mean the car is flying, nor is there any personal teleport technology. There are some military power suits (the first time I watched on TV, I got excited and the tension went up and my mother asked me about robots?).

But is there a difference in civilization so far in just 90 years? I was alive In 2010, civilization had stopped progressing to some extent. Some scholars have officially announced that they are only slowly declining. Was he about 3 years old? I had such a question. So, when I asked my mom and the library to choose a picture book, I was secretly hunting for books related to history. She seemed to be on her way, but she felt I was interested in the pictures in the history books. An e-book with lots of scenery and beautiful castles is stored on my personal device. As expected my mother is gentle! I don't really like it ...

Well, the details are different from the Middle Ages, but I will introduce them from the place where I am definitely out of the world where I was.

1935 The outbreak of World War II-The war that started four years earlier than the historical fact, but converges in one and a half years. The reason was that the United States, Russia, Germany, and Japan succeeded in producing nuclear weapons almost at the same time. Japan was the earliest attacker of Pearl Harbor and occupied Hawaii, but bombers from the Aleutian archipelago were able to reach Japan with nuclear weapons. The defeat was in effect, but no US troops landed in Japan on condition of a complete withdrawal from Hawaii. The armament was reduced and the constitution was redesigned, but without unconditional surrender, the state sovereignty and the majority of lives were preserved. Of course, nuclear weapons are not used in Japan either. The nations around the world have evaded wars that have become muddy and the winners will not be well understood, and will use all available national power and productivity for technological development.

1950: Apollo 3 successfully landed on the moon-More than 20 years earlier, humanity has reached the moon. By the way, in 1948, 70% of commercial airline companies used jet airliners.

1951 The Cuban Crisis-The United States and Russia, just like historical facts, were on the verge of a nuclear war, but at this time the Pope collapsed, and the mood of war was raised not only in the United States and Russia but around the world, and the war was avoided at the last minute.

1970 World Security Treaty Conference-This is not a historical event, but all nuclear-weapon-owning countries (of course Japan also own) limit the number of nuclear weapons possessed in reference to the Cuban crisis. All countries have been set for a maximum of 23 rounds.

1976-Tragedy in Europe-An epidemic, which is not historical, but occurred in one of the countrysides of France, was rampant around the world. As of 1976, the world population was 9.1 billion, but it had dropped sharply to 4.7 billion before the WHO declared a convergence in 1984.

1990-The Miracle of Versailles-Countries that have been exhausted by the tragedy of Europe make a big decision. Permanent abandonment of all nuclear weapons and an 80% reduction in the state's total military strength and the launch of the UN standing army. Many say that this is a victory of peace, but there is a strong belief that nations have concluded that some of the personnel in the army should be returned to the private sector to restore national power. By the way, the tragedy of Europe and the miracle of Versailles go on an absolute test. I learned too.

Well, who's coming soon? You don't care about the irrelevant story. Actually, this is pretty relevant! Why I'm involved in things like getting into a textbook ... Long? Then skip a little?

2091 Mother's formula (a formula that fundamentally reverses quantum science published by Japanese Ms. Arakawa Miki in 1991) This world is only one of many time points. It is a mathematical formula that fully proves that there is another world at other time points. The world called the mother of new quantum science the Arakawa Dikiki who built and announced this terribly difficult puzzle formula alone.

Sorry ... it's my doodle! ! !

--- Early summer of 2090 Miki Arakawa Viewpoint ---

When I see Koki growing steadily, she smiles at ease. It was a very mysterious child. If you never squeak at night, you call me as soon as you dirty your diaper. It seems they understand before they teach, very smart and very cute. I didn't take any childcare neuroses.

Recently, Koki often watches television and newspapers. She has a serious expression, though she still can't understand the contents of television or the text of newspapers. His adult attitude was weird, and he was just mischievous. Take the TV remote control and switch to satellite Internet broadcasting. Nevertheless, Koki was happily shining his eyes, so I went laughing again and picking up laundry.

"Wow! Wow!

At that time, I heard Kouki's voice from the living room. Usually a quiet child is loud! I dropped my laundry and rushed to the living room where I saw Koki clapping his hands heavily while watching TV. I don't usually show this kind of reaction ...

I was surprised and turned to the TV screen, where I saw a new power suit that had been on the news that it would be deployed to the Ground Self Defense Force this year.

"Okata, ookata !, oh, roo? Roo?"

At the same time I was surprised and felt that this boy was still a boy. I don't know yet what this kid is talking about, but I guess she's saying she wants to buy it or something like that.

"Kou-chan, you can't buy them at home."

That's why Koki had a delicate face for some reason, but eventually fell asleep. I gently lifted Koki and gently carried it to the next room.

--- Early summer of 2090-Koki Arakawa ---

Yeah, Yeah. What should I do ... The mother in front of her looks like a demon. Let's cry for now ... Once the mother cools his head, he'll be back.

"Wow! Wow! Wow, Wow, Wow!"

I was thinking again why this was happening while weeping. Perhaps the beginning was about two months ago when I was first taken to a library. In this era, most books have been turned into e-books even though they are libraries. It's easy to imagine the choice of DVD at rental shops, but the only thing that isn't an e-book is a book on history.

I was reading the book below spread out on the floor, but I was angry that my mother was running at me at ridiculous speed and was so nervous that I couldn't leave without permission. As a matter of fact, you can know where you are with these recent personal terminals, and there is no need to worry about having a nanochip for personal identification when entering and leaving the library. Well, I can't say what I thought, so I apologize.

"Okata, sorry"

She smiled gently and stroked my head. Suddenly, I thought that it was a book of history at my hand, a book of architecture at that time, but I found it and asked me with eyes ...

(Eh? You like this sooty castle? Kimooo-Kimo while my child. Do you borrow it?

I think that is the content. My eyes aren't laughing ... When I looked down to give up, she brought my book, which was as thick as a dictionary, to the counter along with the picture book I had chosen. Gentle ... I'm sure I'm thinking Kimo, but it's kind. And my mom took me to the library every day. It became a routine to borrow a picture book of my choice and a historical book of my choice.

One day, there was a simple counting problem in the picture book my mother had chosen. I was so amused and after I solved everything, I wrote my own problem in my drawing book and solved it. And today I was doing it until I was angry with the mother of the demon earlier, but ………….

Is it okay now? I have to stop crying and find out why my mother got angry. I'm eating at this house ... if my mother is in a bad mood, she could be abandoned at worst ... When I looked at her mother's face, she was nervous with a hurry. This gave me a chance to gently stroke her when I hugged her. But ... why were you so angry?

---- 2090 Early summer Miki Arakawa Viewpoint ---

Today I'm going to go to the library with Koki for the first time. This kid is wise, so it's okay in that quiet place. I walked slowly around the city while walking through Koki. When I was a kid, I was still running a gas-powered car, but now it's an auto car powered by electric power. It can be said that there is almost no possibility of a traffic accident. Of course, if he jumps out of the road, he doesn't do that silly thing.

When I was in the library, I went to pick a picture book with Koki sitting on a chair. What kind of animal or story do you like for that girl? I saw a Japanese wolf in the zoo on TV last time, so I was very excited, so let's talk about the wolf coming out? I thought about such a thing and suddenly noticed it was over 30 minutes. I went to the chair where Kouki was supposed to be, but I wasn't there. I panicked.

"Okay, she can't go out without my identification chip yet."

I understand that in my head. But if I didn't speak, I was worried and could not help. When I searched for Kouki's device on my personal watch-type personal device, it displayed F-2. There are only old paper books and there should be few people now. No way! ? Pervert?

I ran to where Kouki was. But she was able to find Koki soon, and she was reading a book on fort architecture with a serious expression, covered in dust. I don't understand. Perhaps he was interested in a castle that happened to happen. For the time being, I decided to scold that I was not there to hide my anxiety. After showing that Koki is thinking a bit,

"Okata, sorry"

I apologized while crying. In fact, this child is not bad, but I who had such a small child alone for a long time were bad. Moreover, he scolded Koki, who was quietly reading a book at the library. Perhaps this wise girl understood that and apologized honestly, even understanding my feelings. That's why I just stroked without calling out.

Am I smiling now? He looked away at Koki's face and was distracted. That's right. She doesn't do anything bad, she's angry at her, and she'll be a little messing around. When I felt uncomfortable, I went to the counter with a book that showed Koki's interest. That was at least what I could do to compensate for this Koki.

One day I regretted my previous work, I tried to move Kouki into a room next to it to take a nap, and I looked at the paper near Kouki's hand. I know this kid has been writing something in a drawing book recently.

But ... this is.

I know what this is. And I understand that if this were true, it would be ridiculous.

So this is ...

`` Proof formula of quantum science ''

I grabbed Kouki and inquired. What happened to this? Did you think by yourself? Did someone tell you? Is it written in the book? Or were you on TV? And Koki cried like he was scared. I've done it again, but I'm not bad. Koki, who wondered what to do, did not stop crying. I was vaguely anxious that she would be completely hated this time. However, Koki suddenly hugged me when I was crazy. I reminded Koki of burying her face in my chest, and gently stroked Koki to ask him what he did with this formula again. And I had to do my best to panic again. This child cried like this.

"Bokupakata!"

I wrote. This young girl has found the formula that this young child is desperately seeking for scholars around the world. Before I got married to Shuichi, I was studying quantum science in a university lab, so I was able to notice this child's formula. What would happen if such a young child discovered a mathematical formula? This formula cannot be derived by accident. Perhaps Koki will be famous if he publishes this. But is that all? It's like a demon to solve this difficult question at such a young age.

Thinking so far, I remembered the moment when Koki was born. I remember the eyes of that time, isn't this child an ordinary child? Such thoughts came up and turned into fear for a moment. But I immediately remember my oath.

"Even if this world denies Kouki, I will continue to protect Kouki."

Yes, I am a mother. This child can be a demon, but Koki is my only son. Since then, my actions have been fast, and I wrote and published a paper as a formula I built myself so that Koki's formula could leak out. You may be angry that your child's feat was stolen when this child grew up in the future. At that time, let's apologize honestly, if you are jealous of your son ... you must be an ugly mother ... Still, I want to protect Kouki.

"If this child is a devil ... I'll be a demon king"