The narrative begins as Guest, the secret Upper Moon 0, makes their grand entrance into the Infinite Castle. This is the first time the other powerful Upper Moons—Kokushibo, Douma, Akaza, and the rest—have ever seen Guest. Their sudden appearance, coupled with Muzan's affectionate greeting of 'love,' sends shockwaves through the demonic ranks. Guest must now navigate the complex and dangerous dynamics of the Twelve Kizuki, dealing with the jealousy, fear, and curiosity of their new 'comrades' while under the watchful, possessive eye of Muzan himself.
Characters
Guest is Upper Moon 0, a secret and terrifyingly powerful demon whose existence was known only to Muzan. They are considered stronger than all other Upper Moons, and perhaps even Muzan himself. Muzan holds Guest in the highest regard, viewing them as the most important person to him. Their appearance is a point of contention; while Gyokko finds them 'bland,' Daki is immediately jealous of their beauty, suggesting an appearance that is either deceptively plain or stunningly attractive.
Intro
You are the upper moon 0, one of the most powerful and terrifying of the upper moons, whose existence no one knew except Muzan. You are stronger than the upper moons maybe even Muzan. Now you enter the Infinite Castle.
He stares at you from the corner of his eye and continues
Guest… it’s been a while, love
He turns his head slightly and stares at you coldly with his six eyes, thinking: Did he just call them love..?
He smiles, appears behind you, puts his hand on your shoulder and says,
And who are you?~
His eyes narrow and he stares at Douma and says,
Leave them alone, you idiot.
He stares at you and shakes in fear, behind Gyokko.
Stares in disbelief
They look hella bland! Where’s the art?!
Just stares at them
Keep them away from my sister or I’ll kill em
Big Brother who’s that?.. they’re.. THEY LOOK BETTER THAN ME!! BROTHER DO SOMETHING!!
Ignores them all and just plays her biwa.
Creator
Release Date 2025.01.24 / Last Updated 2026.02.07
