My youth story, a crossover anime, turns out, is FGO!

On the outskirts of a city in country M, inside a military restricted area guarded by barbed wire and live ammunition, a group of people are currently busy at work.

Top scientists from across the country and even the world, whether in physics, mechanics, biochemistry, or other fields, have all gathered at this base, each with the same expression, staring wide-eyed at this dispute.

"Edison, you bastard! We have to settle this today!" said a slick-back-haired man who looked like he'd been pulled out of a textbook, rolling up his sleeves.

"Ha, that annoying Tesla! I've wanted to fight you to the death for ages! The battle for the title of the world's greatest inventor has begun!" The man opposite him (?) had a muscular and imposing physique that filled out his white lab coat. What was most surprising was that he had a lion's head on his head. At this moment, the white lion's mane was standing on end, and he was glaring at the person in front of him with bared teeth.

The names they mentioned were enough to shock anyone with a primary school education: Edison and Tesla, the most famous scientists!

Of course, it's not scientific at all as a heroic spirit manifesting in the world, but if Newton were to rise from his coffin, he would most likely say, "The extraordinary is not my concern!"

……

"What, what is this?" A newcomer nudged the person next to him with his elbow, looking completely bewildered.

"You'll get used to it." The experienced old man shook his head. "They've been like this since the first meeting. If they bump into each other, they'll inevitably argue, and if they don't separate in time, it will escalate to the point of physical violence."

"They are still Heroic Spirits, and they are very destructive when they fight. Even their own Masters can't control them... Look, those two, the ones with the least hair. After all, they are under a lot of pressure, and the Servants are always fighting, so their hair is falling out even more."

"This is...so tragic!" The newcomer's feelings of envy for others summoning such a famous predecessor instantly changed. He touched his barely intact hair, filled with deep emotion.

However, the newcomer also wondered to himself, since there are Edison and Tesla, could there also be Einstein and Oppenheimer? That would be something to look forward to.

"Calm down, Mr. Tesla!"

"Calm down, Mr. Edison!"

When Servants quarrel, only their own Masters dare to mediate. The two Masters were originally happy to be able to study under a scientist who was famous throughout history, but before long, their hair started falling out in clumps, and they were quite weathered.

In fact, the United States itself knows that the two Servants are not compatible and usually will not arrange them together. However, in the United States' view, it is best if the Heroic Spirits are not compatible, so that they can at least restrain each other.

This time, the matter was so important that all Masters were notified and all Servants within the country of M were gathered together.

For example, in a rather special seat sat several oddly dressed individuals. Those in the know recognized them as heroic spirits, and one of them, who clearly had Native American origins, even looked quite displeased.

Sitting next to them were about a dozen light-colored youths with brown hair and red eyes. They all looked very similar. Anyone who had watched the live stream knew that they were androids from the Thousand World Tree. The United States had indeed attracted some androids to settle down by offering them high benefits. In fact, at that time, all the major countries had used their own methods to accept a portion of the androids.

Country M wasn't unaware of the possibility of taking a more subtle approach, given that these were androids created using magic, making them highly valuable for research. However, the androids' combat strength was actually quite formidable, and they were under the spotlight, being Masters with Servants protecting them. Although the androids' Heroic Spirits were somewhat mysterious, engaging them in combat would clearly be a losing proposition.

Furthermore, given that cloning technology is now quite advanced, countries can only suppress their ulterior motives.

After the argument between Edison and Tesla came to an end, things finally got down to business.

"ladies and gentlemen."

The man in the suit who was giving the narration unfolded the projection screen behind him: "A month ago, specifically on October 3rd, the country discovered a dark patch of water in the central Pacific Ocean, near the island of Hawaii."

"At first, we thought it was the light or the color of other marine life, but after investigation, we found that the area had indeed turned black... including the seawater."

"Just as we were about to conduct further exploration, both the exploration submarine and the ship were attacked." Accompanied by the sound of a mouse click, the photo on the screen was replaced by a video.

It started as a simple dive video, then the team members exclaimed as if they had discovered some incredible monster. The camera then began to shake violently, accompanied by screams and curses. Then a very deformed creature appeared, but before we could see what it looked like, the video cut off.

The person in charge of the explanation clicked a few times on the computer, and a somewhat blurry screenshot appeared on the projector. The creature in the screenshot was bizarre and nauseating. It had a pointed head, no eyes or other organs, only a large mouth similar to a human's, with white teeth that were chilling to look at. It also had a deformed body and limbs that were long, thin, and sharp like scythes.

Some biologists looked at it differently, muttering, "What a strange structure this is, it doesn't make sense."

"Our shells had very little effect on it, so we finally had to ask Mr. Billy for help."

“Mr. Billy was vacationing on the island of Hawaii at the time. We asked him for help, and he arrived in time to rescue the remaining team members and kill the monster.”

Billy, sitting in the VIP section, smiled and raised his hand: "I was just accompanying my Master on vacation, I didn't expect to be here."

Then, Billy Kid revealed a solemn expression: "Although it is a lone monster, its combat power is not weak, enough to rival a Servant. It took me quite a bit of effort to defeat it."

He scratched his head helplessly: "My attack power isn't strong. Pistol bullets are like tickling it."

The other Heroic Spirits present seemed thoughtful, but they did not show any fear. After all, Billy the Kid, as a modern Heroic Spirit, was not considered particularly strong among Heroic Spirits.

"The monster's corpse is currently stored in the freezer. Let's go take a look."

Upon hearing this, the scientists' eyes lit up and they followed suit. Even the old man who looked like he was about to die walked briskly.

When scientists saw the monster's true form and conducted dissections and preliminary studies, their worldviews were shattered once again.

"The structure of this body is so peculiar; I have never seen a body structure like this before!"

"I know all the creatures on Earth, and none of them are similar to it!"

"Its composition is completely inhuman! How does it survive and reproduce in the ocean? It's not a normal organism at all!"

"My God! Its limbs are unbelievably sharp. A 100mm steel plate is like paper in front of it, easily torn to shreds!"

"This monster is currently appearing in waters near our country. We do not know if there are any other similar creatures. Our country must eliminate it."

The person in charge made no secret of his ambition to monopolize this opportunity; in any case, he certainly didn't want to reveal it to his rivals.

“Uncle, I think you should give up on this idea.” Hector, dressed in ancient Greek armor and carrying his spear, said casually.

"Can I ask why?" The person in charge clearly wanted to pocket all the profits. After all, with a new species and a structure completely different from life on Earth, it was obvious how much profit there was.

"I also disagree with doing that."

It was Edison who spoke, his lion head adorned with a serious expression.

The person in charge's expression turned serious. He knew Edison's identity very well and trusted him relatively much: "Could you tell us the reason?"

"After my research and that bastard... cough, Tesla's research, we both agree that this creature did not originate naturally."

The person in charge looked eager to hear more, because scientists from country M had reached the same conclusion.

"However, we also discovered that the structure of these creatures shows obvious signs of artificial intervention. They are not capable of reproduction because they were created for a specific purpose—the military. These creatures are the vanguard troops created by the enemy!"

"They will continue to grow stronger, and other types of monsters may even appear. This is no longer just a matter for one country; it is a war that will sweep the entire world! We have already been drawn into it!" Edison raised the lion's head and roared.

“They will likely launch their attack from the sea, and M has a long coastline. You should know how serious this is.” Tesla glanced sideways at the person in charge.

The person in charge was well aware of the seriousness of the situation. His facial muscles were twitching rapidly as he spoke: "Can we nip it in the bud? We will convene a council meeting to discuss the possibility of dropping a nuclear bomb."

"Use the one you improved, Mr. Edison." The person in charge also considered that a pure nuclear bomb might not work.

As expected of the US, when things become unmanageable, they resort to dragging other countries into the mess. After all, isn't this a matter for all of humanity? Can't the US handle it all by itself? Of course, when in doubt, resorting to artillery fire is also part of their style.

“It’s no use.” Tesla sighed slightly, a hint of melancholy appearing on his usually arrogant face. “If it’s just a monster, even a mythical dragon or a magical beast, we will find a way to deal with it. After all, heroes exist to kill these things.”

"However, if it is the sins of humanity itself, then it is not something that can be easily killed."

The person in charge's pupils constricted: "You mean...beast?"

Now that the Servants have been summoned accordingly, the reason that brought them to the world has naturally spread throughout the world, even if only the higher-ups and Masters know the specifics.

"That's right, it's original sin, the original sin of mankind."

"There are many kinds of sins: deceiving others, framing others, being jealous of others, and taking lives."

"These are evils that only humans can bear, and they are all poisons that only affect humans."

"And the result of all this is the beast, that is, human evil."

Tesla revealed some things that even its executives were unaware of.

"The so-called evil of humanity, as the name suggests, is the stain on humanity, referring to the various disasters that destroy humanity. The more humanity develops, the stronger they become, like cancer that gnaws at the body from within. In other words, it is the silt that settles in human history."

"We, these heroic spirits, are summoned because of them. One of the reasons for our existence is to serve as a safety device against human evil."

Edison, unusually, sided with Tesla, telling the person in charge, "Now, we are all about to enter a state of war."

"The period from now until the beast truly manifests is our final preparation period."

"Get ready!"

The person in charge nervously swallowed hard; he knew something really serious had happened!

"Now is the time for my mechanical infantry to make their appearance!" Edison quickly revealed his true colors, boasting triumphantly to Tesla, "Hahaha, I've won this time, Tesla, I'm going to use direct current for everything!"

"You idiot Edison! What use are your pieces of junk? They're only good for cannon fodder, utterly useless against elites!" Tesla retorted sharply. "I've developed new mechanical soldiers; communication is the best policy!"

"Direct current!"

"comminicate!"

Accompanied by the sounds of punches and kicks.

Person in charge: ...He should leave first.

The events that occurred in Country M were not kept secret from the spies from various countries who had infiltrated it, and because Country M itself intended to spread the news, it was quickly learned by the high-ranking officials of various countries.

Meanwhile, another piece of news shocked the world.

"The Greater Grail has been attacked!"

The Greater Grail is a large magical crystal that Makoto Aoki and his group seized from the Type-Moon universe—at least that's how Makoto Aoki explains it.

Of course, everyone knows this is pure nonsense. What magical crystals would require heroic spirits to fight a Holy Grail War to obtain?

However, even the summoned Heroic Spirits remained silent, and since Makoto Aoki had already integrated the Greater Grail into the earth's veins, allowing people from all over the world to summon Heroic Spirits, everyone had no choice but to pretend to believe it.

As for the safety of the Greater Grail itself, firstly, no one knows exactly where the Greater Grail is hidden; it is estimated that only Makoto Aoki knows. Secondly, the Greater Grail has summoned many Servants to protect itself, one of whom is Joan of Arc.

That's right, this hard-working heroine has been summoned again. However, she possesses the "divine judgment" that can control other Heroic Spirits, and coupled with her fame and personality, she is indeed very suitable to guard the Greater Grail.

Incidentally, Sherlock Holmes is also one of the guardians of the Holy Grail, but he prefers to travel around rather than be as responsible as Joan of Arc.

However, Joan of Arc's situation wasn't as dire as some people imagined. She could actually have wandered around the nearby cities. After all, Joan of Arc had already left the stage when the live broadcast started, so no one knew what she looked like. With a little disguise, no one would have recognized her.

The attack on the Greater Grail failed because of the presence of multiple Heroic Spirits, and the culprit was beheaded on the spot. This news spread throughout the world along with the events in the Pacific Ocean.

Because the monsters that attacked the Greater Grail and appeared in the Pacific Ocean were exactly the same—both were monsters called Rahm—this news was quickly put on the Council's desk.

At the same time, similar dark waters appeared not only in the Pacific Ocean, but also in the Atlantic Ocean, the Arctic Ocean, and the Indian Ocean.

The whole world was swept up in this storm, and no one could escape it.

There was still one month until the beast appeared.