If You Want to Understand the Parallel World Theory of the Nasuverse, Go Catch Up on Fate/Extra

Shinji, who was pushed to the ground by several people, wanted to get rid of them and go home directly, but he was a little embarrassed by the gazes of several people staring at him.

The righteous little friend——Emiya Shirou was extremely anxious, and put behind his mind the ridicule of Red A who almost forced him to do something.

"Shinji, what does it mean that it will accelerate the destruction of this world?"

"What exactly is this world..." Bazett, who has the attribute of a righteous little friend hidden in his heart, followed closely, frowning and asked, "Why has Mage's Association never..."

"Hmph!"

Standing on the other side, Golden Flash, who probably wanted to highlight his aloofness, snorted coldly, showing an expression that he knew everything.

Shinji knew in his heart that Golden Flash didn't know anything at all at this time, but even if he didn't know what was going on, he would never ask himself actively because of his proud personality.

Shinji, who knew that Golden Flash must be waiting for him to speak (report to the king), did not pay attention to such a trivial matter and answered in a normal manner.

"In the past ten years, through some detections, although we don't know the reason, the Great Source in this world is gradually shrinking. It may be because the shrinkage is only one billionth, so those Magecraft masters haven't felt anything is wrong yet.

But... this rate of shrinkage is increasing exponentially over time. If this rate of shrinkage is maintained, for more than two centuries at most, the Great Source in this world will be completely exhausted. If it were quick, it would only take more than a century. "

"Great Source... What is that?" Shirou asked curiously, "Does it have anything to do with the destruction of the world?"

"Tohsaka, give Emiya some extra lessons."

"You are really good at summoning people..." Rin was a little unhappy, but after seeing Shirou's curious eyes, he sighed, and then began to explain some knowledge about the magic power Lesser Source and Great Source.

While Rin was explaining, Shinji was also thinking secretly with his chin propped up.

The Great Source in this world is shrinking a little bit. I discovered it when I was studying asteroids a few years ago. Originally, Shinji didn't take it seriously. After all, according to the shrinkage rate at that time, it might take tens of millions of years to completely dry up.

But later Shinji discovered that it was not like that. Although the Great Source reduction speed in this world seemed extremely slow, the speed increased exponentially!

Maybe you won't feel anything in ten or twenty years, but if the time goes on for a little longer, Magecraft masters will definitely feel something is wrong!

The rate of shrinkage is getting faster and faster, and in two centuries at most, the world will be completely dead!

This phenomenon reminded Shinji of the world of Miyu in Magical Girl Illya that he had seen in his previous life, but the difference was that the Great Source of that world was already severely lacking and would be destroyed soon.

And this world has just begun.

It's hard to say what caused Shinji. It may be the System-based Parallel World theoretical hypothesis proposed in F/E that "because Solar System has limited resources, the number of Parallel World is limited, and some Parallel World needs to be eliminated regularly."

Of course, there may be other reasons, but Shinji can't think of a reason for the time being.

"... In other words, if that Great Source dries up, the world will be destroyed."

After listening to Rin's explanation, Shirou came to such a conclusion.

Seeing Shirou frowning in thought, Shinji waved his hand. "Hey, why do you care so much about this kind of thing? Even though I just said that, But I believe that those Magecraft teachers have probably discovered this fact. Oh my god...Astronomy Department? It seems like this is the name. I remember that there is such a discipline in Clock Tower. At least those people will not ignore this abnormal phenomenon."

"We have to report it to the association as soon as possible!"

Bazett's brows furrowed into a Sichuan shape, and he made an unusually decisive decision.

"Hey, are you worried? There are professionals who can handle this kind of thing. Besides, not many people here can survive until then. Why are you so worried? There are no people here who really think that they can save the world with their own strength, right?"

Listening to Shinji's words, Rin nodded. "That's right. At the rate of reduction you said, we won't survive until then."

Shirou was still full of justice and retorted, "No, even if we may not survive until then, we will do nothing if we know this kind of thing?"

Because of these words, at least three people present raised their eyebrows, namely Red A, Rin and Golden Flash.

"The question is what can you do?" Shinji looked at Shirou with a strange expression.

Shirou frowned, held his chin and thought for a moment, then looked at Shinji, and said very seriously, "Shinji, although you have a strange personality, I believe you must have thought carefully about this kind of thing. If it is Shinji, you may even have found the reason. I want to know the reason why this situation happened, and work hard from the source!"

Damn it! When did my friend become so smart? Is this still the Emiya Shirou I know?!

Shinji was surprised, but then he discovered something - the people who were staring at him closely at this time also lowered their heads and sighed heavily.

"Because your expectations for me were so great, I didn't know how to answer for a while. But you may have been disappointed this time. I really don't know the exact reason. I just have some guesses."

"Guess? What is it?" Rin asked, "Is it related to what I just told Saber not to recommend her to use Holy Grail?"

Shinji stood up little by little while supporting the ground, and answered unhurriedly, "Well, it's just a guess without any valid evidence. Perhaps, the number of Parallel World is not infinite as we originally thought."

"The number of Parallel World may not be unlimited?"

Shirou had a confused look on his face, but Rin and Bazett thought of something and at the same time propped their chins in thought.

"Originally, the number of Parallel World, because individuals in the world have countless moments of decision-making in their lives, so according to scientific theory, it must be infinite. But there are such things as Magecraft and True Magic in this world, so if you think about it this way, it may not be infinite."

Rin supported his chin and nodded. "It makes sense if you say it this way. Because Magecraft has nothing to do with science, the theory that Parallel World has a limited number makes sense."

Shirou was still thinking with furrowed brows. After all, neither the physics knowledge that high school students had access to nor the knowledge of Magecraft was far enough for Shirou to understand this kind of thing.

"Is... is it because of resources?"

After a long time, Shirou asked with some uncertainty.

"Well, the resources of Solar System cannot support so many Parallel World, so we need to regularly clean up some worlds that do not meet the conditions and are no longer necessary to continue to exist. Although it is only a hypothesis, it is very possible."

"Clean... Clean up a world?!" Shirou is confused. Will billions of people just clean up the world?

Red A started to show off his operation again. "According to this theory, in order to allow more Parallel World to continue, then this is the only feasible method!"

Why do you always like to target me? I have any grudge against you. Shirou wanted to complain, but felt that business was more important. He looked at Shinji again, patting his butt and preparing to leave.

"Shinji, is this true?"

"I've said it's just speculation," Shinji waved his hand, "It may be that something went wrong with Parallel World connected to us, which may have affected the world. There are many possibilities, and of course it's possible that Great Source himself will start to supplement it in two years."

"Really? Is this still possible?" Shirou looked surprised.

"Are you stupid?"

Looking at Shirou who easily believed it, Rin continued angrily, "How could such a miracle happen! Without supplementation, it is impossible to automatically fill it up!"

Ignoring the discussion of several people, Shinji turned around and wanted to go home and sleep. After all, he had a younger sister who was worried about him.

But just as he was about to leave, Shinji suddenly thought of something, turned around and walked towards Lancer with a smile on his face, who had an expression like "It sounds interesting, but it doesn't seem to have much to do with me."

Looking at the hand extended by Shinji with a smile, Lancer couldn't help but shake his head. Now that he is about to disappear, the only one who remembers him is this little brother!

This little brother really values friendship!

Not to mention that Bazett just told himself that this little brother may be related to Bazett's ancestors!

Looking at it again, Shinji has blue hair. There is no need to think too much. Such a smart and popular boy is definitely related to me!

However, he would not say anything about this kind of thing, and judging from the other party's appearance, he has already noticed this kind of thing. Otherwise, why would he give him a VIP card? Otherwise, why would you be so close to yourself?

It's enough for everyone to know this kind of thing in their hearts.

He just doesn't know that the other person is the descendant of that girl. After all, there are too many girls who are on good terms with him.

There are also many people with simple curly hair and blue eyes!

Of course, Shinji didn't know what Lancer was thinking, nor did he know that at this moment, he had become his descendant in the other person's heart.

If he knew about it, he might take practical actions to let the other party know that his title of "professional killer" in this life is no joke!

"Boy, there's no need to shake hands or anything like that." Lancer waved his hand, "I just heard you say that the world is in trouble, but I believe that with your ability, there will be absolutely no problem! I believe you!"

"Huh?" Shinji blinked in confusion, "What are you talking about? Lancer? I just want to ask you about your recent spending at the nightclub. The total after tax is 7.04 million. I'll give you the change. Just give me 7 million."

Lancer's expression suddenly became a little subtle, and he was stunned for a few seconds before he remembered to retort.

"Isn't it free?!"

"Who told you it was free?"

"No one ever asked me to collect money when I went there!"

"Maybe it's because that card has an overdraft limit. It's already overdrafted by 7.04 million. Please settle the account before you go back. As a great hero who has left a name in history, you won't even miss the bill, right? Lancer..."

(p: Thanks to the leader of Dusk's Bond, Yet Slightly Cool! Add 1/10 to the boss)