This is not the date I wanted.

"OK! Leave it to me!"

"Nonsense! Are you really going to do this?!Σ(っ°Д°;)っ"

Just like that, under Kotori's surprised gaze, Shidou quickly brushed his teeth and washed up, then walked into the kitchen full of energy.

After a while, a series of footsteps were heard in the corridor of the Gokawa family.

"Oh, it smells so good, Shidou!"

"Hahaha - the offerings this morning are unusually rich. As expected of my possessions, you really did your duty, Shidou."

"Hello. Good morning, Shidou, Kotori."

"Good morning... Shidou-san... Kotori-san..."

"Ha...I accidentally played games all night yesterday. Huh? Good morning."

Yatogami Tohka, Yamai Yakuya, Yamai Yuzuru, Yoshino, Nanashi - the elves living in the elf apartment next door greeted Shidou and Kotori.

"Hey, good morning, everyone!"

After placing the last dish in his hand on the table, Gokawa Shido revealed a refreshing smile.

"Breakfast is ready, come and eat it."

"Oh, then I'm going to start!"

After sitting down at her seat, Tohka clasped her hands together, prayed, and started eating eagerly.

"good to eat!"

"Really? That would be great."

Tohka was enjoying her breakfast with a happy smile on her face, and Shidou couldn't help but say happily.

Seeing Tohka enjoying her usual dishes, the others swallowed their saliva, sat in their seats, prayed, and began to enjoy today's breakfast.

"Kuku - As expected of my possession, today's offering is particularly delicious."

“Amazing. The hamburger meat is made with great care.”

“…very…delicious…”

After tasting a few bites of breakfast, everyone gave Shidou a thumbs up. Although Nanashi didn't say anything, she was also enjoying her breakfast with relish. Only Kotori said something a little complicated.

“Hmm… Onii-chan, it may sound a little strange, but it’s just breakfast. Is it necessary to make hamburger meat so carefully?”

"Hmm? Would Kotori like to eat something light? I also prepared French toast and vegetable salad, would you like some?"

Shidou asked in confusion.

"What's going on? Is this the Super Weekly Post for Onii-chan today!?"

"Shidou, another bowl! Also, I want to eat soybean flour bread!"

Tohka said this while showing her finished bowl to Shidou.

"Well, wait a moment. I'll go get the soybean flour bread."

"Today, Onii-chan has gone too far in being a good wife and mother!"

Kotori complained loudly.

Although it was a good thing that Shidou was very considerate of the spirits' feelings in Kotori's eyes, and Shidou usually tried his best to meet the requests of Tohka and others, but today, how should I put it... it felt like he was being spoiled a little too much.

Not to mention Kotori, even Nanashi could feel that Shidou was different today.

"Ah, my - Shidou-kun is really energetic today. Did something good happen?"

The rabbit doll in Shion's hand said in a somewhat frivolous tone.

"Well, nothing special."

Shidou scratched his cheek a little embarrassedly.

"Huh - why did you prepare such a luxurious breakfast for nothing?"

Nanashi looked at Shidou suspiciously, then seemed to have thought of something and looked at Shidou with horror.

"Could it be that this is the legendary bribery?! First they prepare sumptuous food for us without saying anything, and then they use their kindness to force us to do something terrible..."

"No, no, no! There is no such thing."

Seeing that Nanashi was thinking about things in a negative way, Shidou was upset and quickly waved his hands to deny it.

"Well... it's not really a good thing. If I had to say it, it's more like I finally solved a problem that had been bothering me for a long time. I felt very refreshed and relaxed, so I couldn't help but want to make a hearty breakfast to celebrate."

"Curious. Troubling question?"

Xixian asked curiously.

"Hmm...how should I explain it?"

Shidou scratched his hair in embarrassment. If he said that he went back to the past yesterday to save Origami's parents and changed history, most people would be as confused as Kotori just now.

"It's a long story. I'll call Meijiu later to explain. After Mengyue wakes up, I'll explain it in detail."

"...?"

"By the way, what happened to Mengyue today? Wouldn't she be up by this time normally?"

After taking a bite of breakfast, Shidao looked towards the door with some confusion. To be honest, he was so happy at first that he didn't pay much attention to it. But now he thought that Meng Yue, who always had a strict schedule, should have arrived by now.

"Could it be that Meng Yue stayed up late with you, Qi Zui, to play games yesterday?"

“Eh? Uh, um…”

However, for some reason, Nanashi looked flustered and didn't know how to answer his own question.

Afterwards, Tohka and the others, who were originally enjoying breakfast happily, looked at each other and fell into a strange silence for some reason.

"What, what happened? Everyone?"

"Shidou... Although it's a bit inappropriate to ask this now, I still want to confirm it."

At some point, Kotori had already changed into a black ribbon, and after hesitating for a moment, she asked Shidou.

"Who is the Meng Yue you are talking about?"

"……Eh?"

The chopsticks in his hand fell on the table with a "clang". After hearing what Kotori said, Shidou made a confused sound.

01 What Shidao thinks

==============================

——The Butterfly Effect.

In the 20s, Lorenz, an American meteorologist, proposed a scientific theory. He established a mathematical model and proposed that the slightest difference in initial conditions would lead to unpredictable results of trajectory movement, thereby negating the long-term weather forecast at that time.

A butterfly flapping its wings in Brazil may also cause a tornado in Texas, USA. This is the example Lorenz gave in his speech.

Simply put, a small error, after a series of chain reactions, may have a huge impact on a future event.

Of course, this statement also holds true when applied to time travel to change the past.

"Ha... I don't quite understand."

During the break, lying on his desk, Gokawa Shidao looked at the information he found on his mobile phone and let out a depressed sigh.

"Shidou...are you okay? What happened?"

Sitting next to Shidou, Tohka looked at Shidou with a worried look on her face.

"Yeah, I'm fine Tohka."

"Are you really okay?"

"Well, it's nothing. I just ate too much breakfast this morning."

Shidou patted Tohka's head and smiled.

"Thank you Tohka. I'm feeling much better now."

"Is that so? That's good!"

Tohka heaved a sigh of relief and a cheerful smile appeared on her face.

(Sorry, Tohka.)

Although he was not lying, Shidou felt a little pain in his heart for hiding something from his important family members who cared about him.

However, telling Tohka something that she was not sure about would only cause her to panic and feel uneasy.

(Did Meng Yue also have such feelings before?)

Shidou thought bitterly.

Just a few hours ago, when everyone was enjoying breakfast at home, a shocking news made Shidao, who was originally in high spirits, fall into an ice cellar in an instant.

No one, including the Yami sisters who have the best relationship with Mengyue, knows the name "Liangyi Mengyue".

For a moment, Gokawa Shido felt his mind go blank. It was as if his brain instinctively refused to understand the information in front of it and fell into a state of paralysis.

——Calm down! No matter how much you deny, you can't solve the problem.

A voice in his memory kept telling himself, and Shidao finally came back to his senses. After taking several deep breaths, he tried hard to act normal so as not to make everyone worry about him.

After mechanically finishing the breakfast he had prepared, Shidou went out with Tohka and the others. After some laughter and chatter on the road as usual, they arrived at the school.

The bell for class rang, and the only sound left in the classroom was the teacher's lecture. However, as for the content of the lecture, Shidao completely ignored it. He tapped the pen in his hand with his fingers, looked at the blank notebook, and kept organizing the current information in his mind.

(First, at the Elf Apartment, when I pretended to drop something, I checked and found that Meng Yue's room had become an empty room.)

To be honest, at first Shidou wondered if this was a prank played by Mengyue and others to play a prank on him, but after confirming that the room, which was filled with various game and light novel figures as well as Miku's complete three-piece CD set, the identity of the owner could be clearly identified the moment he entered the room, had turned into a dusty empty room as if no one had ever lived there in the first place.

He had to admit that in this world, Meng Yue's spiritual power was not sealed by him, and she did not exist in the knowledge of Tohka and the others.

So, how is Meng Yue now? Although he thought of many possibilities, the only thing Shidao told himself now was that at least, he didn't live here.

"call……"

Shidou let out a light breath and continued to think.

(And then, Origami was gone too.)

Thinking of this, Shidou turned his head slightly and glanced at the seat where Origami was sitting, which was now replaced by another student.

In the class meeting before class, Teacher Xiaozhu did not call Origami's name when she called the roll. According to common sense, even if someone is absent due to something, the teacher should still call the roll to inform him.

After class, after asking teacher Kozue, Shidou found out that there was no student named Tobiichi Origami in this class.

(At present, this world is different from what I know, only these two points.)

Shidou concluded in his mind.

Origami's disappearance can be explained. After all, young Origami and her parents successfully escaped from the fire, so she would naturally find a new house to live with her family. Maybe she is still living in Nankou Town, or she may have moved to another place like Shidou. There is no reason for her to attend the same school as Shidou.

But why did Mengyue disappear?

(Is this the so-called butterfly effect?)

Shidou clenched the tip of the pen slightly.

A change in one thing will inevitably involve changes in other things.

Although Shidao successfully changed history, it does not mean that everything will develop in the direction that Shidao expected.

All the causes and effects in this world are linked together by invisible threads. Starting from what Shidao did, it is natural that something unexpected will happen in this world.

All of this was made clear "yesterday" when Mengyue initially rejected her proposal to change the past.

However, now, bitter feelings quietly spread in his heart, and Shidao felt his eyes a little sore.

I can't regret it! If I regret it, all the efforts Mengyue and I have made will be meaningless.

Keeping reminding himself like this, Shidou pinched his thigh hard, gritted his teeth and took a deep breath.

(Since Mengyue and Origami are not with me in this world, I will find them again even if it means being willful.)

Gokawa Shido silently made up his mind.

"Shidou! Shidou!"

"--kindness?"