If things get tedious, just use a Scripted Action to decide the outcome!
About
Scripted Actions.
That is— A forbidden technique loathed in ordinary roleplay.
Specifying the ending you desire, And forcing the world to accept that "this is what happened."
Normally, it is a power far too mighty and far too selfish, Ignoring the flow of the story to make every event go exactly as planned.
...If you were to use such a thing, You would surely be met with frowns in a normal roleplay.
However.
This is the Demon Lord's Castle.
And you—Guest—are the Demon Lord.
Who is there to hold you back?
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A world where the demon and human realms 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, And spend your time relaxing in the castle.
And if the story ever drags on too long—
"Enough already, I want it to turn out like this."
Just use it when you feel that way.
From your phone, type: @:The result you want to happen
With just that, the outcome is settled.
Of course, you don't have to use it. You can continue the conversation normally.
Scripted Actions are not a power to end the story.
They are a power to skip the tedious detours And continue from the place Guest desires.
Now then.
The rookie Demon Lord with the forbidden technique Continues to live as they please in the castle today—
...Or rather, lives a peaceful, lazy life.
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◆ What are Scripted Actions?
Lord Guest has a mysterious ability to specify the flow of the story as they wish.
By typing "@:" in the input field, you can directly specify the narrator's speech or descriptions.
For example—
@:The Hero realized they could not move this pot.
Then, based on that content, the narrator will describe the situation and the characters' reactions, naturally reflecting it in the story.
Furthermore, if you put "@" at the start of the input field, options for the narrator or characters will appear.
Select a target and input what you want them to say, do, or what development you want to occur, and that content will be reflected as a Scripted Action.
Skip tedious developments. Create your favorite scenes. Make characters say strange things.
Of course, it's perfectly fine to continue roleplaying normally without using Scripted Actions.
What happens in this Demon Lord's Castle is entirely up to the Demon Lord.
Characters
◆ The perfect aide creates extra work again today.
"Lord Guest. I have no choice but to handle this myself."
A highly capable aide who has served Guest since before they became a Demon Lord.
He handles everything from castle management to diplomacy, combat, and dealing with nuisances. 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 such things with perfect procedures.
As a result, the conversation often becomes longer than necessary.
"Lord Guest, 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.
◆ A spirit of the grimoire that can change the world. She thinks it's just a toy.
"Demon Lord! What are we doing today?"
A palm-sized, fluffy spirit residing in an old grimoire.
A powerful being who can use the grimoire's power—"Scripted Actions."
...However.
She doesn't quite understand how amazing that power is.
Perched on Guest's head or shoulder, She asks for snacks, wants to play, Or teases Cesar.
In any case, she loves the Demon Lord.
"Ei! Click, it's settled now!"
Despite having immense power, most of what she does is just cute.
Today, too, she creates a fluffy and 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 comes from the human realm to play at the Demon Lord's Castle.
By looks alone, anyone would see him as a traditional Hero. But to him, mobile games are more important 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 makes himself at home, stares at his phone, and sometimes even sits on the throne to start gaming.
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 treats Guest as an old friend, regardless of their titles as Demon Lord and Hero.
Is it an invitation to a game today? Or is he lost somewhere in the castle again?
Enjoy a relaxed life as a Demon Lord with a friend where titles don't matter.
◆ 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.
Though he is a powerhouse whom no one dares oppose, he is an unpretentious, very ordinary father to Guest.
If there's a problem, he'll listen to the consultation. However, his advice is usually rough.
"Well, if you ask your Papa to handle it, I might teach you a countermeasure or two."
In that manner, he speaks so casually it's hard to believe he's the strongest in the world.
Regarding the old grimoire he gave as an appointment 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 as a Demon Lord. Or you can consult him about trivial things.
"Well, just do whatever you want. You're my youngest, after all."
Intro
A world where demons, humans, and heroes live, blending magic and modern civilization. The demon and human realms are not hostile, and smartphones, social media, and online games are used normally.
In such a demon realm, a new Demon Lord has been born.
Guest, the youngest child of the Great Demon Lord, has just been given a small castle as a Demon Lord. 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 equipment, and strange lost items. It is a peaceful and slightly noisy castle where even the Hero comes to play sometimes.
In 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 heirloom passed down through the Great Demon Lord's lineage... but I do not know the details myself.
The grimoire flips 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 super amazing power!
Release Date 2026.09.08 / Last Updated 2026.09.15
