AQUA's clear singing suddenly sounded in the room that was so quiet that it seemed like there was no one at all, startling Mitsuki Umihara in the room.

That's AQUA's most classic old song, Aono P's "Observing the Sky".

It's his phone ringtone. Logically speaking, he shouldn't be surprised, but for him who had just placed Yan Bi in fear, such a sudden sound really surprised him.

It's not that he's nervous, anyone who is in a nervous mood like he is right now would probably be startled by this sudden sound.

Although he knew that there shouldn't be any problems, after all, he had also done a thing of "sending the girl whose hands and feet were all cut off to the apartment in a courier package" (which seemed to be the case on the surface), and if someone really found out, it would be really impossible to tell.

I'm afraid I'll be arrested as a suspect in the crime, right? That's not fun at all.

So his nervousness is also a matter of course, and it can even be said that he can maintain such calmness and sanity, which is probably difficult for ordinary people to do.

Looking at Ji Yanbi, who was lying on the bed and had not yet regained consciousness, Mitsuki Haihara breathed a sigh of relief. In any case, nothing happened in the process.

Although Yan Bi still hasn't woken up, her face seems to be a little better, which is also one thing that makes Haiyuan a little relieved.

Picking up the phone from the side, Haiyuan frowned as soon as he saw the name of the communicator.

What appeared on the screen of the mobile phone was my sister's name.

How could it be such a coincidence?

Seriously, Kaihara was going to call Dono to ask about her situation, because he was really not very reassured.

It's not that he's suspicious, you know that not long ago, Ji Yanbi also mentioned the name of his sister's roommate.

As far as Umihara knows, this afternoon Dome should not be at school, but at the request of a fashion magazine, doing some modeling work.

As a normal working day, it is naturally impossible for Tokiwadai to suspend classes this afternoon. However, the two classes this afternoon are on the list of four subjects that the Dome is exempt from.

These two courses are physics and mathematics, and it is said that because of an incident, the teachers of these two courses took the initiative to make this request.

In general, I can guess what happened - it is estimated that more than eighty percent of them may have been inadvertently depressed by the dome.

Now, it's getting dark. Why did my sister call at this time? Moreover, it is still a mobile phone. At this time, she should be at home.

Could it be ......

Thinking of some unsettling possibility, Kaihara hesitantly pressed the call button.

"Hello? Brother? ”

My sister's soft voice came from the earpiece.

"It's me. Why did you suddenly call your phone? ”

"Because something unexpected...... Ah, please don't worry, I don't have anything. It's just that I'm afraid I won't be able to come back today, and I've already called home before. ”

"Could it be that something happened to Tokiwadai?"

"It's true that something very serious has happened, and the specific situation should be known tomorrow."

Haiyuan Mitsuki glanced at Ji Yanbi on the bed, and suddenly asked a ghostly question.

"Is it related to Hoshikawa?"

"Huh?" My sister's exclamation came from the earpiece, "Why, brother, do you know?" ”

Ka.

Haiyuan's hand holding the phone unconsciously strained, and the all-metal shell even made a soft sound because of it.

"I don't know, it's just a guess. There aren't many people who can make you so nervous, and it's not surprising that Tokiwadai has limited the scope of Tokiwadai. ”

"It's really ......"

"Can you tell me what's going on? Although you said not to worry, but at least briefly explain what it is, otherwise how can I rest assured? ”

"To put it simply...... Well, RSPK syndrome, that's probably it. The unfortunate ability caused some commotion in Tokiwadai, which is now over. I'm taking care of her with my teacher, that's pretty much it. ”

"Oh, I see." Haiyuan pretended to chuckle and said, "I see, then at least don't be too tired." There's not much you can do to help with that. ”

"Well, yes."

"Then let's do it first, I also have something to do here, hang up first."

Hanging up the phone, Kaihara sat quietly in his chair, looking straight into the distance as if he wasn't looking at anything.

There was no light on, and the only sound in the room was the steam of the electric pot where the porridge was cooking.

What's going on here?

Obviously, something happened in a place that I didn't know. Moreover, it is clear that both Shiobi and Hoshikawa have something to do with it.

The problem is that he doesn't know the details, he doesn't even have a clue. He didn't know anything about the cause and effect, the development, and so on.

It's a terrible feeling.

Judging from the previous situation, although Ji Yanbi should know something, even if she wakes up, she probably won't say anything.

So, what else can be thought of?

Umihara sat quietly in his chair, thinking quietly.

"Woo......"

I don't know how long it took, but a soft moan brought Haihara back from his contemplation.

She opened her eyes and looked around, her face full of incredulity.

"Are you awake? Sister Bi. ”

Hearing Haihara's voice, it seemed that Yanbi wanted to sit up. But having lost her limbs, her attempt could only end in failure.

Mitsuki Haihara didn't say anything, he stepped forward and carefully picked up Yanbi's body and dragged it back, so that Yanbi could lean against the head of the bed.

To be honest, this scene is very curious, and people don't know what to say at all.

Ji Yanbi looked at Mitsuki Kaihara in disbelief, but he didn't say anything as if he wasn't aware of it at all.

"Can I use my abilities now?"

That's what he just asked.

Yan Bi shook her head slowly.

"Really? Then take another break. ”

Mitsuki Umihara walked into the kitchen, took out a bowl and soup spoon from the cupboard, opened the electric pot and scooped a bowl of porridge from it. Back in the room, Yan Bi still watched his actions with an incredulous face.

Haiyuan sighed and shook a spoonful of porridge from the bowl and put it in front of Yanbi.

He doesn't think he's good at taking care of people, and he hasn't learned much about caring for people, so that's all he wants. When I was sick, my sister seemed to be going to take care of herself like this, but at that time I was too embarrassed so I refused. But the way Yan Bi is now, it should be impossible to refuse.

"Why?"

Yanbi asked thoughtlessly, but Haiyuan knew exactly what she meant.

"If you want to say why, because senior sister, you asked me for help."

Haiyuan's words made Ji Yanbi completely stunned.

Yes, help.

"Yes...... I'm not normal at all. So, can you save me? ”

Ratchet did say something like that.

That's right, Haiwon is such a person. He didn't have any lofty ideals, and he wasn't a great man. But as long as you are willing to believe in him, he will be strong enough. There is no deep reason for this, just because he is the one who responds to that trust.

That's all.

Tears welled up in her eyes. In addition to crying, Yan Bi really couldn't express her feelings at this time.

"Senior Sister Bi, how is life in Wuqiu?"

“……”

"I've heard that the ranking of the Fog Hills is determined by the rarity of abilities?"

"Yes......"

"Then, Senior Sister Bi, you should be the first."

Umihara tried to have some ordinary conversation.

"No ......"

Finally starting to speak, Yanbi shook her head.

"Isn't it?"

"No, I'm number two."

"There are still people who can be ranked in front of you, senior sister?"

Although he didn't really intend to understand, the information revealed in Yanbi's words surprised him.

"I don't know, no one in the Fog Hill has seen her, only her name will appear in the rankings...... Probably, it's a student who is exempt from all subjects......"

"And such students? It is really worthy of the name of Tokiwadai. ”

At schools in Gakuen City, it is very difficult to get an exemption application. Even his younger sister Dome was only exempted from four courses. Although Kirigaoka and Tokiwadai are not the same, there are still similarities in this regard, and even Kirigaoka, which uses the rarity of ability as the ranking criterion, is no exception in terms of performance.

"Wind Splits Ice Blossom...... All I know is that the person's name is like this. ”

The rarest ability, all subjects are exempted. Could it be that person is better than Dome? Kaihara found it hard to believe.

Moreover, Ji Yanbi's ability is so weird that people can't help but wonder if she is a human being, and the ability that is even rarer than her, could it be that person is not human at all?

As soon as such a thought appeared, Haiyuan kicked it out of his mind. Anyway, that's rude.

Although feeding her while talking to Shiobi caused some trouble for Mitsuki Kaihara, in this case, it was necessary to replenish some calories. So he still patiently chatted with Yan Bi over and over again, and fed this bowl of porridge for Yan Bi.

"I have a lot to ask you, but I don't think you should tell me."

"I'm sorry ......"

"Can't you really tell me?"

"I really can't ......"

Salt Bi's words sounded close to a pleading.

Haiyuan Mitsuki shook his head helplessly, he had already expected such a result.

"Is that so...... Then I'm sorry for your trouble. ”

“…… Why? ”

Why?

Because if it weren't for Yanbi, I wouldn't have noticed anything at all. These words, of course, will not be said to her.

"Nothing." Haiyuan stood up, "Senior Sister Bi, you can rest first." ”

Go to the door and screw the doorknob. He didn't know what to do next, but he was going to leave first. After all, he wasn't going to spend the night in a room with a girl his age.

"Hikari, wait a minute!"

However, at this time, Ji Yanbi suddenly stopped him.

Turning his head, he saw Yan Bi biting her lip gently. After a moment, she cast her gaze on the dark sky outside her window. It was as if he wanted to take the darkness of the night as his enemy.

At the same time, it was as if he had made up his mind.

"Speaking of which, it looks like there was a plane crash not long ago......

I don't know what I'm talking about, but it's like I'm talking to myself. No explanation was given, it was as if nothing had been said at all.

It can be said that it is an inexplicable word, and it is also an incomprehensible act.

But Haiyuan would never think so, he looked at Yanbi quietly for a long time.

"Thank you......"

After saying this thank-you, he left Yanbi alone in the room. Close the door, take a slow step to approach the elevator of the apartment, and press the button on the ground floor. In the slightly swaying elevator, Mitsuki Kaihara leaned his back against the elevator wall, watching the floor instructions flashing non-stop, and did nothing. Even if the occupant of the apartment kept going up and down, he just stayed in the deepest part of the elevator, rising and descending with the elevator.

There is definitely some kind of reason for this kind of thing. But what he knew wasn't enough for him to think of an answer.

If it's just him, it's not too much of a problem. However, the truth does not seem to be so rosy.

On the other hand, Shiobi and Hoshikawa are both people who have a close relationship with their brother and sister. Is this really just some kind of coincidence?

This is even more of a topic that is not clear to say.

"Air Crash ......"

Muttering about what Yanbi had said to him at the end, Haiyuan was still confused.

This senior sister of his own must be hinting at something to himself, but he really can't understand what kind of relationship the plane crash has to do with this.

"This classmate, what's going on? Need help? ”

When the elevator reached the ground floor for the fifth time, the manager in charge of elevator supervision came to inquire about the situation. Presumably because he had been in the elevator, arousing the suspicion of the management who had noticed the incident from the monitors.

"Sorry, I just got distracted."

Apologizing to the manager, who seemed to be a good talker, Kaihara stepped out of the elevator. He didn't know what he was going to do next, so he had no goal at all.

Looking up at the entrance of the apartment, in the dark sky, the plane's indicator lights flew forward at an even speed.

Crash...... Is it?

Pull out your phone and connect to the internet. Haiyuan typed the word "air crash" into his phone. After a simple search, a large amount of information appears in the screen of the phone.

Haiyuan looked down one by one, and eliminated them one by one.

Until one of the messages caught his attention.

It was an introduction to the rules of aviation, and most of it was of little value. But one of them caught the attention of Mitsuki Haihara.

That's an article about air distress, and it reads like this:

When encountering an emergency where the plane is likely to crash, the pilot must make a timely call for help. The way to call for help is to shout three times in a row in the common civil aviation call language.

The cry for help is—

————

Mitsuki Umihara frowned unconsciously.

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Testimonials under the uploader's boredom:

Here's what I'm bringing with me.

There is a lot of physics content in this paper, so there are many related evaluations. I've even found people who say it's hard to believe that anime's dead house has anything to do with physics. Actually, as far as I know, this is not only normal, but it is definitely not a minority. In fact, there are quite a few people with strange hobbies, and they may even be the top ones.

To illustrate this point, I recommend one here...... Thesis.

That's right, you read that right, and I wrote it right. This is an academic paper, and it was published in the authoritative Physical_Review_Letters (i.e., the famous Physical Review Letters sponsored by the American Physical Society, with an impact factor of 7.328).

You can search for it, and there are still them. Not in Chinese, though.

I know that many people may want to scold me, but I just want to say that in fact, this paper only needs to understand its core.

This is a paper recommended to me by a friend (I don't know where he found it), and my whole body was petrified in an instant.

The title of the paper is as follows:

Shape_of_a_Ponytail_and_the_Statistical_Physics_of_Hair_Fiber_Bundles

The Chinese translation should be: "Statistical Physics of Hair Fiber Bundle and Ponytail Shape".

Note! This is not a title party! The core of this paper is indeed to systematically study the shape of a girl's ponytail, and explain how they look under gravity, and why they look the way they are.

All I can say is that there are too many complaints, and I really can't complain. (PRL!) Buddy. Academic papers! Brothers. Horsetail control! Otaku. ）

Lo and behold, the most authoritative field of physics is not only a group of dead houses, but also a large number of horsetail controls! And he blatantly expounded his love for ponytail in the most authoritative academic field in the most scientific way.

I strongly urge the author to let the dome tie a ponytail once to pay tribute to these top horsetail controls in the world's physics community! (That's a bunch of Brits, by the way.) ）