As far as the eye can see, the sea of vacuum.

Boys and girls, people who can't be seen, talk to each other.

"I think I've finally figured it out now." "I'm sure I understand what this is all about," the girl said. ”

"What do you understand?."

"They will surely find that one of us is dead, and the other will live in a world without clues."

"But I don't understand it at all."

"Yes, it must be. Whether you live and I die, or whether I live and you die, I don't think it's been determined. ”

In the sea of vacuum, tiny particles are constantly being born, approaching each other and disappearing from each other.

"What do you mean?"

"Because they haven't seen us yet, this incident hasn't been finalized yet."

"You mean...... The outcome will depend on who they will see alive? ”

"Yes. The wave function representing this event is still in a superposition state, and everything is uncertain. It wasn't until they saw us that the incident was determined. At that time, one of us will be sure to die, while the other will survive the endless hardship. ”

“…… Is there no way? ”

"There is no way. This is the binding of the laws of nature, and as long as we are 'observed', the results will become a reality and cannot be changed. ”

"But ......"

"Don't look like that. Whoever of us will survive and who will die will be doomed sooner or later. It's not anyone's responsibility, it's just the choice that comes with the Schrödinger equation......"

In the sea of vacuum, boiling is like a pot of hot "soup......

…………

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The girl opened her eyes in the golden morning light.

At first glance, it was still the white ceiling that she was used to, and the girl smiled helplessly.

I had that dream again. That dream with no clear meaning, but never changing.

Sit up and change into clothes. After a brief wash, the girl walked out of the room.

Although it was already early in the morning, there were still a few people who woke up.

Gently opening the door next door, the girl named Zhixian Tripper, who had been noisy yesterday, really couldn't get up.

"That...... Dome? ”

Behind him, another girl's weak voice was heard.

The girl's name is Tsuki Dome (つかつき_そらの(tsukatsuki_sorano)). A name made up of a quirky surname and a grand name.

"What's the matter? Clothes? ”

"Sorry, did you quarrel with you yesterday?"

"No, not at all."

Dome smiled at the slow-half-beat girl who always seemed a little stunned.

With more than an hour left before the allotted breakfast time, Dome thought for a moment and walked to the library.

Here, it is a Child_Errors facility in the 19th school district of the school park city.

Ironic names, sarcastic appellations. Speaking of which, the name that is most easily accepted and can best reflect its essence should be that.

A child's care home, or orphanage.

Well, it's that simple.

As a school-centered school city, even childcare centers have educational resources that are difficult for the outside world to understand. For example, the library of this children's care center is not just fairy tales for children.

Pulling out a book titled "The Extension of General Relativity" from the shelf, Dome looked at it quietly.

In this children's care center, Dome is a well-known person.

At first, when Qiong Nai began to flip through the books of differential geometry, no one cared at all. After all, a little girl with a single-digit age would not believe that she could understand such complex mathematics.

Until one day, this little girl used pen and paper to deduce the Einstein field equation single-handedly for an afternoon.

"Every kid on the streets of Göttingen knows more about multidimensional geometry than Einstein. Still, it was Albert Einstein who did it, not any mathematician! ”

Hilbert, the great mathematician who deduced Einstein's field equation earlier than Einstein and can rank among the top 20 greatest mathematicians of all time, once evaluated Einstein's contribution so harshly. However, no one really thinks that a child can understand Riemann's non-Euclidean geometry, let alone derive Einstein's field equations.

But that day, Hilbert's satire became a reality to some extent.

At a young age, he taught himself complex theories and succeeded, which made Dome the focus of the childcare center. Countless famous schools have sent invitations to Dome, and although they themselves have declined, they have not rejected private requests for personal guidance.

Now, there is a teacher who teaches Dome every day. This teacher is said to be one of the top five celebrities among the teachers of the famous private Tokiwadai Junior High School.

For this reason, Dome also made a special confirmation. Indeed, his name can be found in countless academic papers on physics.

"A little girl with infinite talent."

This is what Qiongno's teacher says about her now.

In fact, in several recent papers by her teacher, there is a name named "Solano" in the "Collaborators" column. In fact, the pronunciation of the name of the dome is read in the Roman phonetic alphabet, which is the origin of the name "Solano". Dome has even been involved in her teacher's research. Her teacher's research direction is also the hobby of Qiong Nai - general relativity.

It wasn't until the bell ringing for breakfast in the children's care center that Dome put down his books. There was no need to clip a bookmark, because she had read the book countless times, and it could almost be said that she could memorize it backwards. The reason for repeating the pages is just to pass the time.

"Hoo ......"

Taking a light breath, Dome got up and walked into the restaurant.

There were already quite a few people sitting in the restaurant. Almost everyone is already there, except for the person in charge of the childcare center.

"Ah, are you here?"

The girl named Edada stumbled at her, and Dono smiled back and sat down beside her.

Dome didn't really have any friends in the child care center. Because compared to others, she has obviously gone too far, too far ahead. There was no one else who could walk with her.

However, the branch is a very obvious exception. Only this mature girl, who has no scheming and often doesn't even think about anything, can talk to her in a very natural manner. A similar example is actually the Harugami Kimono that I saw in the morning.

"Do you know that? Someone seems to be coming today. ”

"Where did you hear that?"

"Hehe, I eavesdropped on the director's phone just now. It seems to have something to do with the uncle who often comes to you, and it's all from that Chang ...... I often come from somewhere. ”

It is Tokiwadai. However, Tokiwadai? This was a real surprise. ”

Tokiwadai Girls' High School, located in the 7th School District, is a famous aristocratic girls' school in Gakuen City, and it is on a completely different level from this childcare center. It's hard to believe that the two are connected.

Although the current teacher of the dome is from Tokiwadai, it is completely private, although I don't know where the teacher knows about it.

In academia, this is actually a very common occurrence. Not only are students choosing teachers, but teachers are also choosing students. The famous physicist Heisenberg tried to study mathematics with a famous mathematician when he was in college, but was rejected. However, there is absolutely no way to link this incident with Tokiwadai.

Dome doesn't think he has the conditions to have anything to do with Tokiwadai. Although he has the ability to reach LV.2 and is only one step away from LV.3, he is almost certain that he will be able to meet the entrance requirements of Tokiwadai by the time he reaches the age of entering junior high school.

Again, Tokiwadai is a famous aristocratic girls' school, and the high tuition fee is an insurmountable obstacle, which even his own teachers can't find a way to solve. Aside from himself, this childcare center has absolutely nothing to do with Tokiwadai.

Could it be that the teacher was asked not to come here again by Tokiwadai? It's quite possible.

"Alas......"

After thinking about it, Dome Nai, who had only come to this possible conclusion, sighed.

After breakfast, the children in the child care center all began to study according to the predetermined curriculum after a short break, with the exception of Domeno. And of course, apart from the teacher from Tokiwadai, there was no one who had the ability to guide her.

Sitting on the edge of the roof, he continued to read the book he had just read, and even though he had read it many times, Dome still forgot the passage of time as always. She really likes the feeling, the feeling of being immersed in physics and mathematics. And liking is often the beginning of obsession.

That's right, obsession. It is difficult for ordinary people to understand difficult physics and complex mathematics, but some people are deeply attracted to it and are obsessed with it. That obsession, many times, comes from a kind of pride. Because, when you can really grasp them, when you use them, you are also equivalent to understanding the mystery of creation. It was an attempt to ascend the ladder of gods as a human being.

Dome is actually hiding a small secret, and this secret is what makes her obsessed......

After some time, a black shadow appeared above her head, blocking out the light. Dome looked up and saw the face of a handsome and immature boy.

Unfamiliar appearance, age...... It should be about the same as myself, maybe a little bigger. There is absolutely no such boy in the child care center.

"Who are you?"

"What are you looking at?"

Almost simultaneously, the boy and girl asked each other questions.

Dome held up the book and showed the title to the boy.

"Hmph...... Pretending guys. ”

For some reason, the boy seems to have some inexplicable hostility towards Dome. He tilted his head, making sure he had never seen the boy. Dome closed the book and got up, jumping from the roof.

Her action startled the boy and caused him to scream.

Falling from a height, Qiongno's body gradually slowed down as it fell, and the gravitational acceleration was reversed to a negative value after a short period of normality, which manifested itself as a deceleration on her body. By the time the dome finally reached the ground, the speed of the fall had completely zeroed. She stepped lightly on the ground and glanced back at the roof.

That's what she's capable of, the ability to control the gravity of an object.

The boy on the roof had clearly not recovered from the shock, and the look at his stiff expression made Dome amused.

No, it's not just funny. In fact, Dome really laughed.

As a result, the boy on the roof looked even more ugly.

"Dome! Are you there? ”

At this time, a volunteer from the children's care center came over shouting the name of the dome.

"I'm here, what's the matter?"

"The director is looking for you, as if there is something important."

"The director is looking for me?"

Qiong Nai was slightly stunned, was he really expected it?

"Well, I'll go over it."

Looking back at the roof again, his gaze inadvertently intertwined with the boy who remained on the roof, and a vague premonition was gradually overflowing.

This is the process of the first meeting between teenagers and girls.

Years later, when they recall this scene, it still feels subtle and incredible.