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

"It ended just like that, without me ever having a chance to use my skills."

Gazing at the rising stars on the horizon, the still handsome and stylish man in his fifties took a sip of red wine. The rich and lingering flavor of the wine exploded on his tongue, but the expensive wine did not attract any attention from the taster.

"Haha, don't even think about playing your tricks, Professor."

Opposite him, of course, was his mortal enemy, the world's only and most famous consulting detective, Sherlock Holmes.

As a typical English gentleman, Holmes only becomes somewhat sarcastic and confrontational in front of his old adversaries.

"What this incident needs is not detectives and criminals, but warriors willing to protect their homeland and the determination to put aside hatred. You're right about that. There's absolutely no place for us."

Holmes shook his head, his expression somewhat uninteresting: "This summoning was completely accidental. Hopefully, the next one will have a more interesting case."

"That's true, but I'm already prepared to commit my greatest crime!" On Moriarty's table was a blueprint, a plan he had devised by calculating the asteroid's dynamics. It was originally one of his backup plans to deal with Tiamat, which involved using his Noble Phantasm to make the asteroid fall and hit Tiamat or the Lahem Tide.

However, because this would have a huge impact on the Earth, Moriarty's plan was placed far down the timeline, and the reconciliation between humanity and Tiamat rendered his plan completely useless.

“It’s such a pity that I finally have a chance to carry out an evil plan to uphold justice—” Moriarty drawled, his eyes flashing with evil light. “After all, everyone can see through my plan, but they can’t stop me because of the greater good, and they even have to help me, right, Holmes?”

Holmes sighed slightly: "I'm starting to be glad your plan didn't come in handy."

While allowing asteroids to fall freely could indeed kill enemies, it would also alter Earth's environment. For one thing, if it crashes into the ocean, it would trigger tsunamis and waves; if it crashes onto land, it would cause explosions and shockwaves. Moreover, wherever it falls, it will cause immense damage to Earth's climate and ecosystem. The dust it generates will obscure the sky, weakening solar radiation and causing a rapid drop in Earth's temperature, potentially leading to droughts and famines.

At that time, humanity, which had already suffered heavy losses in the Battle of Tiamat, would probably be on the verge of extinction. Therefore, Moriarty's plan was a perfect example of mutual destruction.

Of course, if things really get out of control, humans will definitely do that, after all, that's human nature.

For Moriarty, this was the perfect plan: to do evil in the name of justice—that's what an evil leader should do!

"Then it's decided!" Moriarty's lips curled into a wicked smile, his dark aura making him appear incredibly terrifying. "Next time, I will definitely carry out a similar plan. Of course, it would be pleasant if everything went according to my plan, and it would also be pleasant if things didn't go as I wish!"

"I just hope I can meet an interesting detective." Moriarty was filled with anticipation.

But.

"Don't let me see that stinky face of yours again, you wretched Holmes!" Moriarty made no attempt to hide his disdain for Holmes.

"Haha, why bother so much, Professor?" Holmes laughed heartily, finding joy in seeing his old nemesis suffer.

"Shut up! Why am I a stylish gentleman in my fifties, while you're a young and handsome guy? This is absolutely unforgivable!"

Moriarty stated the reason directly: he was extremely resentful about appearing in the world at the advanced age of over fifty. You have to understand, he was a handsome man in his youth! And can you believe that he would have back pain and even bend his back at such an advanced age? He's a Heroic Spirit, does he have to be so realistic?

Youth is wonderful! Should he go and train with Li Shuwen, who is also an old man...? Never mind.

Considering Li Shuwen's training methods, which were similar to Scáthach's, and his serious temperament, which was also similar to Scáthach's, Moriarty decisively gave up.

His back can't take any more strain.

"Who says heroic spirits only manifest in their prime? For you, Professor, being in your fifties as Napoleon, who controlled the criminal world, was truly your prime. In short, you are indeed a troublesome 'old' adversary." Holmes deliberately emphasized the word "old."

"Where are the tomatoes and eggs?" Moriarty pretended to go find the tomatoes and eggs to throw at Holmes, but actually picked up something that looked like a coffin, his eyes filled with displeasure. "You came to me before you left just to humiliate me?"

"Alright, alright, let's get down to business, Professor." Holmes immediately backed down. To be honest, he couldn't beat Moriarty, who had merged with the Phantom Slinger, in a real fight.

He's a detective, and his only skill is Barton; shouldn't he rely on his assistant for combat?

“As a detective, I’ve come here to uncover the truth… It’s about time you abandoned your plan to stir up trouble after the war and continue as the leader of evil.” Holmes shook his head slightly. “Didn’t you say this world is meaningless?”

“Have you ever seen an evil leader abandon his plan?” Moriarty smiled smugly. “Even after defeating the Beast, I don’t necessarily have to return to my throne. As long as I’m reduced to a phantom, I can still use any means necessary to continue existing in this world. As for you, the Arbiter of the Greater Grail, you will absolutely not be able to stay after the Greater Grail disintegrates.”

"Wouldn't it be wonderful to avoid seeing your hateful face, Holmes?"

Just like Saber, who also has a modern-day ending, Moriarty can suppress his power to the minimum, and the world's consciousness may not care about him when he is no longer strong. However, Moriarty himself does not rely on force. As long as he has wisdom, he is still the Napoleon of the criminal world.

"But everyone here knows your true colors, which must be quite boring," Holmes said with feigned sarcasm. "No matter what you do, it will be misinterpreted; that's the tragedy of an evil leader!"

"Heh." Moriarty gave a forced smile.

"Alright, Professor. You wouldn't like this world now," Holmes said with a smile. "As I said before, this case doesn't need detectives and evil leaders. Now it's time for us to leave, isn't that what you were planning too?"

According to Holmes's deduction, although Moriarty had prepared some backup plans, he had no intention of staying behind. As for the evidence? Because he was Holmes, he was naturally the one who knew Moriarty best.

Given the current state of humanity, a mandatory distribution system will likely be in place for some time, leaving no room for maneuver for the black organizations.

"And then leaving with you would be terrible!" Moriarty was very unhappy.

"Speaking of which, it seems you left something for that criminal organization?" After all, Moriarty is the leader of the Black Organization.

"Hmph, they're not exactly a criminal organization anymore. Of course, I've also left some puzzles for the detectives of this world, enough to give them a real headache!"

"That's so typical of you..."

In a bickering exchange that was both sharp and surprisingly harmonious, the detective and the criminal both made their exit.