The divergence point of this Lostbelt from Pan-Human History occurred in the ultra-ancient period, around fourteen thousand years ago.
The Wandering Star of Predation, the arrival of the Giant God of Destruction, the laziness of the six primordial fairies, and the absence of the Holy Sword Bearer… Though for Naoki this was a story told many times, Ritsuka, Mash, and even Chaldea over there knew nothing about it.
Thus, right after asking Mash to prepare the contact formation with Chaldea, Naoki still gave a simple explanation of the long 11,600-year events in this Lostbelt, from 14,000 years ago to 2,400 years ago.
Including, but not limited to, the reason for the formation of this British Isles, Rayshift Morgan, the matter of Cernunnos, and the deeper affairs of the Naraku Worm.
After hearing Naoki's story, Ritsuka, Mash, and Chaldea fell silent.
"This Lostbelt… its divergence happened so long ago."
"Just like Olympus back then."
The fifth Lostbelt Ritsuka and Mash visited—Olympus—also diverged when the Giant God of Destruction arrived. Because the Greek gods made different decisions from those in Pan-Human History, it diverged and eventually developed into a Lostbelt.
Unexpectedly, this British Lostbelt was the same.
[But developing like this is actually one possibility. After all, they're fairies. Laziness isn't something impossible for them.]
On the projection over the Round Table shield surface, Merry—who had deep ties to Britain—was temporarily replacing Commander Roman's position, sitting there and communicating with this side.
[So, what happened after that? Naoki Number Two, you only told up to two thousand four hundred years ago. Something must have happened then that caused this Lostbelt to become what it is now, right?]
Naoki nodded: "I said it earlier—I'm the individual separated from my original self two thousand four hundred years ago. In fact, two thousand four hundred years ago was also when my original self arrived in this Lostbelt."
Two thousand four hundred years ago, Naoki from Pan-Human History left Lostbelt Shimosa, came to Lostbelt Britain, and was soon found by Aesc, who had inherited everything from Morgan. He accepted her request, became her partner, and promised to save the British Isles—doomed to destruction since birth.
But at that time on the British Isles, humans and fairies were in civil war. So Aesc prepared to unify the entire Fairy Nation before saving Britain.
For that, Aesc and Naoki—disguised as Merlin—educated a human boy named Uther.
[Pffft!]
Hearing Naoki use Merlin's identity to become the teacher of a boy named Uther, Merry burst out laughing uncontrollably. At the same time, in Avalon unknown to anyone, Merlin—who had been peeking at Chaldea—showed the same reaction.
Neither expected Naoki to do something so outrageous.
[Sorry, sorry—I couldn't hold it, hehe. Please continue your explanation, Naoki Number Two.]
"It's fine, I understand. It feels weird even when I recall it myself. And I did call myself that on purpose to get that reaction from you." Naoki laughed. "Back to the main topic."
Life as Merlin lasted about half a year. No major events occurred during that period—at most, improving the human food environment and living standards.
The main point was six months later.
"Six months later, Aesc and I went to northern Britain—that is, the south of the Boundary Isle where we are now. In the ruins of Dragon Albion, we found a living being born from its right claw, and then went to one of the six great clans, the King Clan, and obtained a promise from the clan head, Mab."
The King Clan head, Mab, promised that after the human rebellion succeeded, she would politically marry her daughter to the human King to jointly rule the Fairy Nation afterward.
But right after obtaining the promise, on the way back to headquarters, Naoki and Aesc—who had completed all their goals—while exterminating Mors (fallen fairies), the event that turned this Fairy Nation into what it is now occurred.
The Naraku Worm sleeping deep beneath the British Isles—known in Pan-Human History as Vortigern—triggered the first super-disaster in history to destroy Britain.
"Twenty thousand murder weapons enough to annihilate all of Britain appeared out of nowhere, pushing humans and fairies to a dead end. And facing the end of the world, the dark sides of humans and fairies fully erupted. This must be very clear to Merry, right?"
[Yes—using others as shields to save themselves, pinning hopes on others while doing nothing themselves, and even blaming and insulting them if the result isn't good despite doing nothing themselves—things like that, right?]
"Yes, and such things happened repeatedly across Britain at that time. Aesc witnessed these scenes of degeneration and truly lost all hope in fairies and humans. While I had already been disappointed in fairies from the start."
"So, Britain was destroyed—not by those twenty thousand murder weapons, but by Natsukawa Naoki. He followed his inner thoughts—and Aesc's—destroying all of Britain with Moon Fall."
Naoki destroyed all of Britain.
Hearing this past from Naoki's own mouth, Ritsuka and the others fell silent. They hadn't experienced it, but it was hard to imagine how degenerate Britain had become to make the Department Head willing to destroy the entire island…
[But what about Britain now?]
Merry continued asking.
[You said Britain was destroyed two thousand four hundred years ago, but isn't Britain now fine? Though we can't observe anything here, from your story, the British Isles should still exist now, right? Humans and fairies should still be living on it, correct?]
"Because after that, Naoki and Aesc together revived the entire British Isles."
"Both the dead humans and the dead fairies… The two of them, after destroying the entire British Isles, revived the entire British Isles."
"I was also born at that time—as the price Naoki had to pay to revive the entire British Isles."