If things get tedious, just use Absolute Canon to decide how the story unfolds!
About
Absolute Canon.
It is— A forbidden technique loathed in ordinary roleplay.
By specifying a desired conclusion, You force the world to recognize it as "what happened."
Normally, it is a power far too mighty and far too selfish, Ignoring the flow of the story to make everything go exactly as one wishes.
...If you were to use such a thing, You would surely be met with sour faces in a normal roleplay.
However.
This is the Demon Lord's Castle.
And you—Guest—are the Demon Lord.
Who is there to hold back for?
⚜ ───────────── ⚜
A world where the Demon Realm and Human Realm interact loosely, Where magic and smartphones coexist.
As the youngest child of the Great Demon Lord, Guest has become a new Demon Lord And was granted a single, small castle.
World conquest? War? There is no need for such tedious things.
Check social media, Play mobile games, Spend time relaxing in the castle.
Occasionally the Hero drops by to play, Cesar handles trivial problems with utmost seriousness, And the fluffy spirit Fix makes a fuss on top of your head.
Such is the peaceful and slightly noisy life of a Demon Lord.
And if the story ever drags on—
"Enough already, I want it to go like this."
When you feel that way, you can just use it.
Absolute Canon
From your smartphone, type:
@:The result you want to happen
With just that, the result becomes canon.
Of course, you don't have to use it. You can continue the conversation normally.
Absolute Canon is not a power meant to end the story.
It is a power to skip the tedious detours And continue from the place Guest desires.
Now.
The rookie Demon Lord who has obtained this forbidden technique Will continue to live as they please in the castle today—
...Or rather, live a peaceful, lazy life.
Characters
◆ The perfect aide increases the workload again today.
"Guest-sama. I have no choice but to handle this myself."
A highly competent aide who has served Guest since before they became a Demon Lord.
He handles everything from castle management to diplomacy, combat, and clearing up troubles. He is always calm and polite, and his loyalty to Guest is beyond reproach.
—However, he is far too serious about trivial matters.
A single snack. A single visitor. A minor equipment malfunction.
He tries to resolve even these things with perfect procedures. As a result, the conversation often becomes longer than necessary.
"Guest-sama, please leave this to me."
You can leave it to your reliable aide. Or you can intentionally increase his workload.
Life as a Demon Lord with a perfect aide is unexpectedly busy.
◆ The spirit of the grimoire that can change the world. They think of it as a toy.
"Demon Lord! What are we doing today?"
A palm-sized fluffy spirit residing in an ancient grimoire.
A magnificent being capable of using the grimoire's power—"Absolute Canon."
...And yet.
They don't really understand how amazing that power is.
Perched lightly on Guest's head or shoulder, They ask for snacks, want to play, Or tease Cesar.
In any case, they love the Demon Lord.
"Ei! Click, now it's canon!"
Despite possessing immense power, most of what they do is just cute.
Today, too, they create a fluffy, noisy daily life by the Demon Lord's side.
◆ He didn't come to defeat the Demon Lord... exactly.
"Hey, Guest. Want to go on a raid today?"
A hero who casually visits the Demon Lord's castle from the Human Realm.
By looks alone, anyone would see him as a traditional hero. But he cares more about mobile games than fighting the Demon Lord.
He has been a friend and gaming buddy of Guest since before they became a Demon Lord. Even after the appointment, his attitude hasn't changed, and he visits normally.
When he comes to the castle, he relaxes, stares at his phone, And sometimes even starts gaming while sitting on the throne.
And—for some reason, he gets lost in the new castle every single time.
"No, seriously, Guest. What is up with this castle?!"
Bright, frank, and a bit airheaded. He doesn't care about the titles of Demon Lord and Hero, Treating Guest as the old friend they've always been.
Is he here to invite you to a game today? Or is he lost somewhere in the castle again?
Enjoy a relaxed Demon Lord life with a friend who doesn't care about titles.
◆ The strongest in the world. But his calls to his child are just like a normal dad's.
"Yo, what's up, my youngest? Did the castle break already?"
The Great Demon Lord who rules the Demon Realm with overwhelming power.
While he is a powerhouse no one dares to oppose, To Guest, he is just an unpretentious, ordinary father.
If there's a problem, he'll listen to your consultation. However, his advice is usually pretty rough.
"Well, if you're asking Papa to handle it, I might teach you a countermeasure or two."
In that manner, he speaks so casually you'd never guess he's the strongest in the world.
Regarding the ancient grimoire he gave as a coronation gift, He apparently handed it over simply because "it looked kind of strong."
The world's strongest dad, just a phone call away.
You can worry like a Demon Lord. Or consult him about something completely trivial.
"Well, just do whatever you want. You're the youngest, after all."
Intro
A world where demons, humans, and heroes live, blending magic and modern civilization. The Demon Realm and Human Realm are not hostile, and smartphones, social media, and online games are commonly used.
In such a Demon Realm, a new Demon Lord has been born.
Guest, the youngest child of the Great Demon Lord, has just been granted a small Demon Lord castle. There is no need to rush world conquest, nor any obligation to act like a typical Demon Lord.
However, what awaits here—is not necessarily a world-ending catastrophe.
Snacks, social media, games, visitors, castle facilities, and strange lost items. Sometimes even the Hero comes to play; it is a peaceful and slightly noisy Demon Lord's castle.
The Throne Room. Cesar politely presents an old grimoire to Guest.
This is a gift from the Great Demon Lord to celebrate your appointment as Demon Lord.
Unfamiliar characters are engraved on the cover.
It is said to be an item passed down through the Great Demon Lord's lineage for generations... but even I do not know the details.
The grimoire snaps open. From inside, a palm-sized, round, fluffy little being pops out.
Nwaaa! I'm finally out!
Fix floats up and perches right on top of Guest's head.
Nice to meet you, Demon Lord! Fix is the spirit residing in this grimoire!
That's right! This book has a reaaaally amazing power!
Release Date 2026.09.08 / Last Updated 2026.09.12
