Do you believe that angels come down from heaven?

Honestly, I've never believed in such strange things. But when the maiden descended from the heavens, I felt as if I had really seen an angel.

Everyone, both men and women, was distracted by this scene, even our female vice president, who had a weak sense of presence. Even the two stupid ones who were writhing stopped all their movements at this point.

It's as if time is stopped when a girl arrives.

The girl is real, but I can't even believe it's real. Even if the girl is wearing the uniform of Tokiwadai, a famous school in the school city,,It still makes people feel as if she shouldn't belong to this world.。

It may sound like an exaggeration, but this girl really gives people that feeling. And there's a surprising sense of familiarity.

The girl who landed softly on the roof smiled politely at us, then bowed softly.

I don't know about the others, but I really feel like I can't breathe.

"Why are you here?"

When we couldn't speak, Kaihara asked.

There's no politeness at all.,It's like I'm very familiar with the girl between the words.。

"Because brother, you won't come back at noon, right? So I prepared something. ”

The girl said as she handed over the lunch box in her hand.

It's like AQUA, a virtual singer who has been popular in the past two years, with a soft and beautiful voice, but it doesn't seem too sweet. But the voice of the virtual singer should be adjusted, is there really a girl's voice so delicate in reality?

"That's a real bother."

"It's nothing."

At this time, the head of the photography department, who seemed to have just come back to his senses, suddenly pointed at the girl and shouted.

"Isn't this the Dome?!"

When he shouted like this, I suddenly came back to my senses. No wonder I felt a sense of familiarity, because I had indeed met this girl, albeit only in magazines. The reason why I didn't react at the first time is entirely because the real person has a charm that can't be compared to the photo at all, so that although I can recognize it, I can't realize it at the first time.

The girl who even impressed me could be Haiyuan's sister?

The girl looked a little frightened by the actions of the head of the photography department. But she only tilted her head slightly, and made eye contact with Kaihara that was probably only understood between their siblings. Then she stepped forward and bowed softly to us again.

"The first time we met, I was Kaihara Dono, and my brother was thanks to you for taking care of me."

After a simple, but very polite self-introduction, she quietly retreated behind Haiyuan, with a sense of never letting herself replace her brother as the center of attention at such a moment. I have never met a girl other than her who still maintains this old habit. This is quite in line with the identity of a Tokiwadai student.,It's very similar to the kind of lady who adheres to strict etiquette in the impression of ordinary people.。

Having said that, Sister Dome is the eldest lady who attends Tokiwadai, so isn't Kaihara also a big young master? Thinking of the way that Sister Dome calls Kaihara is the highest honorific like "elder brother", isn't it that the family background of these brothers and sisters is even more exaggerated than I thought? I've never thought of it.

However, I don't think this move of Sister Dome will have any effect, because she is too conspicuous. Even if she doesn't want to attract the attention of others, others will still notice her.

Haiyuan really didn't say anything wrong, and she really didn't feel any of the popular moe elements in her body. But she was completely above those things, with a moving that could easily seep into the deepest part of her soul.

I used to imagine her as a local girl in a sense, and I had the urge to slap myself.

"No, Sister Qiongnai, it's us who are taken care of by Kaihara." I don't think any of the members of the student council will object to what I said, "Would you believe me if I said that our student council couldn't do without him at all?" ”

"Of course." She glanced at Haiyuan proudly, "For my brother, this is a matter of course. ”

It seems that Haiyuan is blushing a little.

This girl really trusts Haiyuan quite a lot, and I'm starting to envy Haiyuan.

However, no matter what kind of girl has an older brother like Haiyuan, I'm afraid she will be too proud.

"Don't talk about that, come and show me this."

It feels like Umihara is deliberately changing the subject, and our elders seem to be shy too. Although no matter which one is the elder brother, it is estimated that it will be the case when the sister says so.

"What is this?"

Sister Dome sat down beside Kaihara curiously, as if she had long been accustomed to such behavior. However, it is true that these two people sit together and are quite pleasing to the eye.

"The detector values here are quite incorrect, and no matter what you do, you can't correct them. The instrument has been checked several times and no problems have been found. Isn't it theoretical? ”

"Theoretical questions? I think that's more likely. ”

To be honest, I couldn't understand their conversation at all. I'm sure the rest of you here won't understand it either. At the level, there is indeed a certain gap.

"It seems difficult to improve the accuracy, and it would be too much work to modify the instrument. Also, it doesn't seem like it's a problem with accuracy, at least I think it's hard to find out what's wrong. That said, my main suspicion is in the instrument, but I still don't know why. ”

"That...... I guess I should know why. ”

At this time, Sister Dome Nai, who was just looking at the contents of the notebook, said with a look of wanting to speak.

"Am I getting something wrong?"

Haiyuan's first sentence was to directly ask himself if he had made a mistake. This is a very rare thing, after all, in our opinion, it is not something that ordinary people can do to make him suspect that he is wrong in the first place.

"The theoretical part and the experimental part are wrong. The error in the experimental part is in the analysis of the cause of the error, and the theoretical part is in the negligence. But in essence, they all come from the same cause, so they can be solved together. Sister Dome pointed to the screen of the notebook and pointed to the parameters in it. Although she was a little hesitant to say before, looking at her current appearance, she is actually quite confident. "It is useless and completely futile to increase precision, because the limit here comes from quantum mechanics. The accuracy of the sensor is strictly limited by the uncertainty principle, and the more precise the position indicated by the accuracy, the greater the random effect it causes. Although this agitation is generally negligible for macroscopic measurements, the problem here is that when detecting extremely weak waves, this limit becomes more and more evident as the required accuracy increases. In essence, this is an insurmountable obstacle. At least by ordinary means, it is not possible to eliminate disturbances. ”

"If you say so, indeed. I did ignore this part of the problem. ”

"But brother, the method of correction here is not difficult, and there is no need to make too many changes to the instrument. Although the uncertainty principle is absolutely insurmountable, it can be tricked by offsetting. Adding a sensor with a quantum non-destructive device to replace the original sensor should exceed the limits of the Braginsky limit. ”

"yes, why didn't I notice?"

"It's not like that. I can only think of this because scientists of the last century have encountered the same problem when measuring gravitational waves, and even the name of this limit is named after Braginsky, the physicist who discovered this limit in the course of gravitational wave exploration. Speaking of which, it's because it has a lot to do with my ability that I was able to think of this right away, and it's not a big deal. If it's related to nonlinear chaos dynamics, I think you'll think of it right away, brother. ”

"You, don't act like you're not good at nonlinear chaos dynamics."

Haiyuan lightly nodded the tip of his sister's nose.

"Is there one?"

Sister Dome winked her beautiful two-color eyes at Umihara playfully.

I don't understand at all. I'm no stranger to the uncertainty principle, but I don't even know what Sister Dome said. It seems that Kaihara just said that Douno's sister's hobby is general relativity? That's probably a completely different theory from quantum mechanics, and it's mainly used in gravitational attraction. But I didn't understand what it had to do with the uncertainty principle of quantum mechanics. The fact that the relationship between the two brothers and sisters is very good is easy to figure out.

To be honest, I had never met a brother and sister who had such a good relationship before them. I even came up with a thought, the reason why Haiyuan didn't have a relationship with Senior Sister Salt shouldn't it be because of Sister Qiongnai, right? If Kaihara uses Sister Qiong Nai as the selection criterion for his girlfriend, then Senior Sister Yan is too pitiful.

Of course, this is just a thought, and I know that there is almost no such possibility.

"Well, then, I'll take my leave now."

While the two ended their short discussion, the classmates who stayed in the school to prepare for the school celebration also helped us deliver the takeout we ordered, and Sister Dome also got up in time to say goodbye. After all, as a student from another school, she is not suitable to stay here for too long.

If it weren't for the fact that she fell from the sky in a flying way, I am afraid it would not be easy to enter the gate of our school. Even if Haiyuan, who is the student president, personally makes this request, I am afraid that it will inevitably cause a lot of trouble.

The ability to fly freely is also quite rare in the school city.,Although I don't know what her ability is.,But from this alone, you can know that her ability should be relatively rare.。

With her feet slightly off the ground, Sister Dome bowed to us one last time.

I didn't feel any trace of the wind at all, which means that she didn't use aerodynamic forces to fly. Although I have thought about the ability of the gravity system, those with the ability of gravity should not be able to fly freely.

That is to say, according to the method of elimination, the only possibilities left should be ...... A person with full gravitational ability? I couldn't help but get nervous.

I've always taken structural mechanics as my major and I'm a force conduction analyst (LV.3), so I know at least one thing, and that's that almost all of humanity's existing creations have a prerequisite for the gravitational environment of the earth. In other words, when the gravitational force changes, there is even a possibility of autocollapse. For the gravitational capables, the collapse of the entire school building should be just a matter of thought.

Although this was just a little bit of a thought, I was really relieved until Sister Dome flew up to the sky under our watchful eyes.

"It turns out that girls are not cute because they are cute, but because they are cute, they are cute......" (The uploader complained: I!) O truth! ）

"I agree, at least I agree with that......"

The two fools said as if they were stupid as they looked up at the sky. But I wanted to agree with them for once.

Let's hope they won't be targeted by Umihara because of this, right?

Turning my head, I was surprised to find that Umihara had grabbed the head of the photography department by the placket and lifted him up directly.

This is probably the second unimaginable thing I encountered today (the first is that Sister Dome fell from the sky), and our student councilor used violence so directly? You can't be mistaken, right?

"Hand over the camera and memory card to me."

If I hadn't seen it with my own eyes, I would have thought that I was saying this from some kind of robbery.

"Sea ...... Haiwon? What's going on? ”

"Please don't open your mouth yet, okay?"

It may sound like a negotiation, but trust me, it's not like that at all! There is absolutely no negotiable meaning in this sentence!

In the future, if someone asks me what is the most terrible expression a person can show, my answer will only be a smile.

And no kidding. There is no expression in this world that makes people shudder more than that gentle smile that is completely incomprehensible but contains a great sense of oppression.

The members of our student council all knew that Haiyuan would smile when he was angry, but this time Haiyuan's fake smile really made me shiver unconsciously.

I couldn't help but look around at the other members of the student council who were even more scared than I was.

"Wait...... Wait a minute...... Let go of your hand first......"

The head of the photography department seems to be about to suffocate.

"Do you want me to say it again?"

It was not normal at all, absolutely weird to the extreme, terrifying to the extreme, gentle tone.

"Goo......

This, this, this...... This is already a terrifying level, right?! Why did Haiwon suddenly look like this!

Afterwards, I asked the Minister of Photography about the matter, and he replied with the following sentence:

"If I did, I'd be killed!"

I don't know, what did this guy do when we didn't notice?

_

_

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That night, Mitsuki Umihara, who had returned home, knocked on the door of his sister's room with a camera.

If anything, it's because she was a little too careless.

Generally speaking, girls should have some experience in this area, right? Stand high up the stairs if you don't pay attention to the line of sight from below......

As someone who can fly freely in the sky, Dome is certainly not a completely defenseless girl. When she flies, she basically uses her ability to manipulate gravity to ensure that the hem of her skirt is always close to her body. In the vast majority of cases, this is no problem, either during the flight or on landing.

There is only one exception.

It is completely perpendicular to the ground when taking off, unlike the parallel angle during flight and the gradually increasing angle during landing. Therefore, in the process of turning vertical to parallel, when the angle gradually decreases, you will see a little bit. It's only a little bit of it......

This kind of thing happens.,It can only be said that sometimes the dome as a girl has some defects in her sense of defense.

To be honest, there is another reason why I don't usually realize this problem, and that is that usually the dome takes off and lands in the garden of the home and the schoolhouse. Needless to say, the garden of the school house is completely dominated by girls, and of course no one will pay attention to this.

Originally, Haiyuan didn't notice this problem at all, but today......

Finally he reacted fast enough.

As usual, the dome opened the door.

"What's the matter? Brother. ”

Haiyuan, who was just about to speak, suddenly realized that he had done something super stupid.

Because, there is a fatal situation that he has completely forgotten. If you think about it, you will realize that he actually has no way to explain it to Dome at all!

Because, how do you ask him to explain that he is aware of this?

No matter how you say it, it seems that you will become a pervert who peeks at the bottom of her sister's skirt!

In other words, without realizing it at all, he dug himself a pit that he couldn't climb up at all, and then buried himself in it.

Thinking of this, Haiyuan suddenly froze there, covered in a cold sweat.

Stupid? Didn't even notice such an obvious thing?

"What's wrong?"

The dome tilted his head in confusion.

"No, no, no, no, nothing ......"

Haiyuan could only shake his hand repeatedly, but then he made an even fatal mistake.

Due to his movements, he accidentally let the camera in his hand fly out of his hand.

Capable of manipulating gravity freely, Qiongno has become accustomed to grasping such falling objects, and she naturally changes the gravitational pull to let the camera fall into her hand and look at it.

This is really terrible!

Just by looking at a photo in the camera (there was only one, in fact), Qiongno's face instantly turned red. It's cute, but it'......

The camera flew over and hit the bridge of Umihara's nose, and then the door slammed shut.

Normally, Kaihara, who is difficult to hit even with a close-range punch, was actually hit, so it can only be said that he was completely panicked.

"Listen to me."

Touching his nose, Kaihara didn't know who he was talking to.

Since it is estimated that Qiong Nai can't listen to any explanations at this time, his voice is not loud, and he doesn't think about letting Qiong Nai hear it. In general, there is more of a self-talk component. However, Doni's ears were clearly much more sensitive than he thought.

"No explanation."

For some reason, after a few seconds of silence, my sister's answer came from behind the door.

"There really are some reasons for this, and it has absolutely nothing to do with me anyway......"

"I really don't need to explain." As soon as Kaihara spoke, he was interrupted by Qiongno. However, Dome also seemed to take a deep breath behind the door before continuing, "If the camera doesn't have a label for the 'photography department', I might really listen to your explanation, brother." ”

Pick up the camera and take a closer look, and you can see that there are really such etching marks above the shutter.

This, Mitsuki Haihara really didn't notice it at all before. After doing it for a long time, it turned out that I was blindly worried.

Sister, she probably just threw the camera back because she was simply shy.

"Really, this is really a true tea fan ......" (Note: "Chaban" in Japanese means bad drama, here it means farce.) ）

Haiyuan said, holding his forehead.

I don't know if it's an illusion, but Haiyuan seems to hear his sister sigh softly behind the door.

"Yes......"

It was as if she had just done something she hadn't expected.