Tokyo Jujutsu High, Tombs of the Star Corridor.
When Kyoto was attacked, Eichi was in the basement of the Tombs of the Star Corridor, researching the imaginary world with Medea, Tamamo-no-Mae, and the others.
Although they called it a "world," it was actually a barrier with an extremely vast internal space.
Its performance even surpassed the four Netherworld Barriers, which were currently the highest rank in Japan.
This imaginary world had two purposes.
First, it simulated a vast imaginary world, absorbing the negative emotions of people in the real world into it.
At that time, this world and the real world would be like two sides of the same coin, with countless "windows" opening across Japan, drawing people's negative emotions into them.
The Cursed Energy and Cursed Spirits formed from these negative emotions would first take shape in the imaginary world and be exorcised before they returned to the real world.
Of course, these windows that absorbed negative emotions and Cursed Energy would also be covered with a layer of gauze.
This layer of gauze served both to prevent ordinary people from falling into the imaginary world through the windows and to ensure they would be notified immediately if a Cursed Spirit accidentally left the imaginary world.
The imaginary world could not only fundamentally reduce the harm Cursed Spirits posed to ordinary people, but also greatly improve the monitoring capabilities over Cursed Spirits.
After all, if you were already in my world, wouldn't it be easy for me to monitor you?
This would also significantly reduce the number of Jujutsu Sorcerer casualties caused by observation errors from the windows.
Moreover, the concepts they envisioned actually had prototypes within the Tombs of the Star Corridor.
The Netherworld Barriers created by Tengen in the Tombs of the Star Corridor and the constantly shifting thousand barriers were excellent reference materials.
After all, even Kenjaku in the original work could not guarantee that he could accurately locate Tokyo Jujutsu High's Kiko, requiring Mahito to first send in a finger marked with his Cursed Energy to pinpoint the location.
The key to this was the thousand constantly moving barriers created by Tengen.
Without Tengen's permission, you would not know which barrier the door you opened would lead to.
And the Netherworld Barrier, which was more advanced than ordinary barriers, empty barriers, and Curtains, was used by the group as the foundation for upgrading and transforming it into the nearly complete imaginary world they had now.
Second, in conjunction with the Throne of Heroes currently under construction, it would provide a place to live and a battlefield for the Heroes when they were not summoned.
This world lacked entities like the "Throne" and the Counter Force.
Therefore, all the Heroic Spirit records collected so far had been inscribed within the Holy Grail that the System had initially given Eichi.
If, at that time, the Jujutsu Sorcerers in the imaginary world were no match for the Cursed Spirits, or if major events in the real world caused widespread panic, leading to a significant increase in both the quantity and quality of Cursed Spirits...
Then Heroic Spirits could be directly summoned to clear the area.
And there would certainly be more than one imaginary world in the end.
If this experiment succeeded, then in the future, whether it was layers of nested worlds or creating several imaginary worlds arranged like neighbors, it would all be possible.
At that time, a specific imaginary world could even be designated as a residence for Heroic Spirits.
Since the imaginary world was created with barriers as its theme, the environment, residences, and so on could all be changed by modifying the barriers.
If that was not enough, they could also use Projection and Conceptualization to create what the Heroic Spirits desired.
Any Heroic Spirit could freely change the environment of their residence according to their preferences, mood, and other reasons.
At that time, if a Heroic Spirit wanted to be active, they could come to the imaginary world to live and fight.
If they got bored, they could return to the Holy Grail and sleep for a hundred or a thousand years.
Eichi also had his own selfish reasons.
Once the Throne of Heroes was completed, he would definitely record his companions into it as well.
If they followed the Type-Moon setting, even someone as strong as Satoru would find it difficult to become a Heroic Spirit.
After all, he had neither had a significant impact on the world, nor was he widely sung about and praised, nor was he worshiped as a god.
While Satoru's strength was immense, in the Type-Moon world, where destroying a world was commonplace, his ability to blow up a city block or wipe out a small country did not really rank very high.
But that was okay. There were also Heroic Spirits who became such by forging certain contracts with the world.
At that time, they could make a contract with the Holy Grail, and their information would be recorded in the Holy Grail.
Moreover, the Soul of this world was extremely special. It could be preserved in the Holy Grail after their death.
But none of that needed to be considered now.
What needed to be done now was to create the first imaginary world.
However, Eichi's research was interrupted before it was completed, as Artoria and Satoru simultaneously sent him a meeting invitation.
Tokyo Jujutsu High meeting room.
When Eichi arrived, Satoru, Masamichi, and Artoria were already seated.
Seeing this scene, Eichi could not help but frown.
There were too few people, and all of them were core figures of the Tokyo Branch, which indicated that the matter might be very serious.
After all, big matters had small meetings, and small matters had big meetings, right?
"Yah, finally, someone arrived later than me."
Satoru looked at Masamichi expectantly.
But Masamichi ignored him.
"Unfair! Why do I get punished with an iron fist when I'm late, but Eichi is fine? Principal Yaga, you're playing favorites. I protest!"
"What happened?"
Ignoring the two who were about to begin their usual interaction, Eichi turned to Artoria.
"Heh heh heh, I know! Those old geezers in Kyoto got a good poke in the ass! Ah, poor old geezers. I didn't expect them to actually get thoroughly poked this time. Boo hoo hoo, so pitiful!"
Just as Artoria was about to speak, Satoru interrupted.
Eichi finally understood why Satoru was especially excited today. If anything could make him so happy he could not sleep, it was pranking his best friend and kicking the asses of those old geezers in Kyoto.
"So brave. Whose subordinate is this?"
Eichi asked curiously, since even if Kyoto's old geezers were rotten to the core, it would not be difficult for them to produce a dozen Grade 1 Jujutsu Sorcerers.
Each of the Big Three Families had multiple Grade 1 Jujutsu Sorcerers permanently stationed there.
Moreover, Takako and Ryu had been transferred there a few years ago.
It was worth mentioning that for a long time last year, Yuta had been a Grade 1 Jujutsu Sorcerer, and Jujutsu Headquarters did not issue a Special Grade certificate.
It was not until they spent a great deal of effort to second Takako and Ryu to Kyoto that Yuta's Special Grade approval went through.
"According to news from Kyoto, Abe no Seimei, who sealed himself a thousand years ago, reappeared last night and has now gathered a considerably large force."
As she said this, Artoria handed the request for aid to Eichi.
"Abe no Seimei?"
Eichi was very surprised.
This name, let alone to Eichi, who had lived in Japan after his transmigration, was known by many people even in foreign countries.
After all, Japan had always attached great importance to cultural exports like anime.
Although many people's first impression of Japan was action movies, their Shinto and other cultures had also become known to many through the spread of anime.
Abe no Seimei was one important symbol among them.
It was precisely because of this that Eichi found it strange.
After all, in his impression, wasn't Jujutsu Kaisen the story of the genius boy Sukuna returning a thousand years later, and after enduring humiliation and meticulous planning, slaughtering his way through the entire world?
Where did Abe no Seimei come from?
(To be continued.)