A Depressed Secret Identity's Record of Raising Kids

The plan to bring the fictional magical continent of Vidir back to life, also known as How to Promote My Original Worldbuilding.

Tsukinomoto Genji, a male student at Teitan High who swore he would break into the Japanese light novel scene, was spurred into action when his childhood friend had already become the "Sherlock Holmes of the Heisei Era." Then... he got utterly crushed by the endless parade of cookie-cutter isekai novels.

After his fifth light novel based on his own magical-continent setting flopped, a secret identity System bound itself to him. The kind that lets you customize your appearance and backstory.

Another unexpected delight! Tsukinomoto Genji immediately decided to use the System to spread his worldbuilding. And so...

[The Last Female Knight and the Castaway]

A young master who ran away from Aomori was taken in by a woman who did nothing but drink and bet on horse races all day, and reeked of booze from head to toe.

Calling it a home was generous. It was about as rundown as a dumpster.

The awful old woman had no respect for her elders or affection for the young. It was bad enough that she bossed him around, but every time he tried to kill himself, she somehow stopped him at just the right moment...

A shady doctor once invited them to work at a portside brothel, but the old woman beat him off.

A short little guy who threw a fit in the slums got a thrashing, then came by awkwardly to thank them. When he and the old woman drank together, they nearly demolished the house.

Later, he met a bespectacled office worker who was always on the job, and a killer who loved spicy curry but never killed anyone. To celebrate him finding friends for life, the old woman put six months' worth of drinks on credit at the Lupin bar.

Later still, a former soldier seeking death came after one of his friends. He had planned everything out, but the one who showed up to meet him was the old woman, a longtime drunk who might not even be able to pick up a sword.

"Hey, picking on a kid? What kind of skill is that? A real knight faces their opponent head-on. And this 'ghost' of yours is nothing but a coward afraid to die!"

"Come on! Saphir, Captain of the Vidir Royal Knights, accepts your challenge!"

Behind her lay a kingdom long since fallen.

And she was its last knight.

[The Magician of the Apocalypse and the Cursed Spirit Manipulator]

Ever since he was little, Geto Suguru could see things other people couldn't: terrifying, hideous, evil things.

Then a private tutor arrived and changed everything.

"Teacher, you can see them too, right?"

"Hmm, me?" The man adjusted his monocle. Long, golden hair, as well-kept as silk, was hardly the sort of thing you'd expect from someone in modern society who called himself a "seasoned teacher." "Being able to see them is one thing. How you see them is another."

"Come to think of it, you're my last student." This teacher, who called himself "Viscas," always wore a smile that seemed to conceal ill intent.

When Jujutsu High came knocking, Geto Suguru was taking his intermediate mage exam. In the measuring cup were fragments of a cursed spirit he'd just crushed with an enchanted stone.

He politely tried to ask his irresponsible teacher for permission, but as usual, the man simply left a letter behind and took off for parts unknown.

After enrolling, he hit it off with the strongest in terms of physical strength, and discussed potion dosages with someone who possessed the Reversed Cursed Technique... Everything seemed to be going smoothly.

But the world of jujutsu was clearly anything but peaceful. It reminded him of Viscas joking about how "the dark magical world ranks people by seniority." The jujutsu world was far worse.

A first-year nearly died. If that fast-acting potion hadn't worked, he would have.

When he received the mission to escort the Star Plasma Vessel, Geto Suguru had a feeling it wouldn't be a simple assignment. That sense of danger peaked when he saw his former teacher choose to erase Tengen completely.

Before perishing alongside Tengen, the man's expression remained calm.

"I can't... let the apocalypse come again..."

It wasn't until many years later that Geto Suguru understood what his teacher had meant.

He was a sinner, the one who brought the apocalypse upon the entire continent of Vidir.

[The Fallen Pope and the Demon-Slaying Blade]

[The Rebellious Crown Prince and the Twisted Holy Grail]

This is... the story of a world that had long since been destroyed.

"Welcome to the continent of Vidir."

Theme: A world of swords and magic really does exist!