In the massive unified city known as Kivotos, comprised of thousands of autonomous regions each identified as an "academy," there existed a central administrative region directly governed by the General Student Council called D.U.
In an office building located on the outskirts of D.U., home to the Federal Investigation Department Schale, a newly appointed manager stood by a window in the club office, peering through a pair of binoculars into the distance.
Though relatively remote, this location wasn't far from the three major academies. The early morning streets bustled with various beings—if those intelligent lifeforms wearing human clothes could even be considered "people."
Cats and dogs walking upright on two legs and robots of all shapes and sizes were the most common residents of Kivotos. Their appearance struck the manager as absurd, surreal, even disturbing.
The students of Kivotos, on the other hand, generally resembled humans. They lacked fur-covered bodies or metallic shells. Except for some non-human features that pure-blooded humans would never possess, they all appeared to be vibrant young girls. Still, their halos, animal ears, horns, or wings made it difficult for him to see them as his own kind.
He did not feel revulsion. These humanoid beings were capable of communication, and with effort, he could see their strange features as decorative. Maybe someday he would come to see them as "moe" traits.
After a long moment, he lowered his binoculars and sighed, once again coming to terms with a painful truth: he had been transported to another world.
Yes—he was a transmigrator. And more than that, he was an amnesiac transmigrator.
He didn't know who he was or why he had come here. All he could recall was his name and some basic knowledge. But how did he know he had transmigrated despite the memory loss?
It was simple. Personality is shaped by experience. Even with memories gone, the subconscious mind retains traces that form one's self. If everything around felt unfamiliar and his reasoning remained intact, there was only one explanation: this was a world unlike his own.
Transmigration was the only logical conclusion.
What's more, the body he inhabited felt natural to move and control. It wasn't unfamiliar in a mirror either. That alone was enough proof.
Maybe he was the only true human in this alien-infested region.
Sitting at his desk before starting work, he tried to piece together his fragmented experience.
It all began with a half-remembered dream—its contents quickly forgotten except for two cryptic lines:
"We thirst for the Seven Wailings."
"We bear the koan of Jericho."
When he awoke, he found himself in a strange office, greeted by a girl who claimed to be an administrative officer from the Federal Student Council. She provided the first bits of information: he had been invited here to serve as a sensei.
Before he could ask more questions, several angry girls stormed in demanding to see the student council president. The manager's last bits of hope evaporated when he noticed the girls' odd physical traits.
The administrator, Rin Nanagami, had pointed elf-like ears and a glowing blue halo floating behind her head. At first, he convinced himself she must have had cosmetic surgery, but the other girls—all just as otherworldly—quickly shattered that illusion.
This couldn't possibly be the world that formed the foundation of his personality.
At that moment, he knew: either he was dreaming, or this was a different world.
Soon after, he found himself leading students in a bizarre battle. These "girls" charged through a literal storm of bullets, emerging with no more than a grunt and barely a scratch—sometimes not even a torn uniform.
As someone educated in real-world physics and biology, he was stunned.
Eventually, he followed the students into the underground of Schale. There, he encountered a masked student who fled at the sight of him. Her animal ears and tail no longer shocked him.
Rin later found a tablet known as the "Shittim Chest" left behind by the missing president. Using the dream's cryptic words as the password, he accessed the system and underwent a mind-transfer experience.
With help from a system administrator named Arona, he regained control of a facility called the Sanctum Tower, returning it to the student council. Rin explained the role and responsibilities of Schale.
All the while, he was like a puppet on strings, accepting one truth after another.
The flood of information was overwhelming. After sending the students away, he sat down to handle Rin's leftover paperwork—but found himself completely at a loss.
He was amnesiac—it made sense that he'd struggle—but even Arona, the AI secretary, was nearly useless. Frustrated, he informed Rin and followed her suggestion to contact one of the students he had met earlier for help.
Fortunately, Hayase Yuuka of Millennium Science School was available and agreed to assist.
Thanks to her and Arona's guidance, he spent the rest of the day learning about Kivotos through the network, becoming increasingly convinced this was indeed another world. The social structure, races, technology—it was all astonishing.
As a pure human, he doubted he could survive a direct gunshot the way these beings did. But in Kivotos, gunfights were almost daily.
The situation was bleak. Trapped in hell, friendless, and amnesiac—this was a brutal starting point.
That night, he lay on the luxurious bed in Schale's break room, hoping desperately that it was all just a dream and that he would awaken in his real world.
He didn't.
So, he chose to endure, to survive in this strange and dangerous world.
Just then, a knock came at the door.
He glanced at the tablet—it was the appointed time—and called out, "Come in."
Yuuka entered.
"Good morning, Sensei."
"Good morning, Hayase-san."
She had a calming presence.
He tried to ignore her halo and focused on her bright purple eyes. Of the girls he had met, she was the most humanlike. He silently hoped they could get along.
"Sensei, you can just call me Yuuka."
Yuuka looked aside shyly, her pale cheeks flushing slightly as she fiddled with her hair. She approached, pulled over a chair, and sat beside him.
Her ponytail brushed his nose, and he caught a faint lemony scent from her shampoo.
Yuuka pulled two files from the pile and handed him one.
"I'll demonstrate with this file. Watch closely, okay? Time's a bit tight, so ask me anything if you're unsure."
And so, under Yuuka's "teaching," he spent the entire morning learning how to handle documents.