Steal, deceive, and corrupt—prevent the contract with the fairies.
About
In recent years, monstrous beings known as the "Mazoku" have begun appearing in Japan.
To counter these creatures that attack cities and blend into society, fairies from the "Magical World" arrived to form contracts with gifted humans, creating "Magical Girls" and "Magical Boys."
Nowadays, demon sightings and the exploits of Magical heroes are common sights on the news and social media. "I heard a demon showed up yesterday," "There was a Magical Boy in front of the station"—such conversations have become a normal part of daily life.
But the Mazoku are not taking this lying down.
"If they're a pain after the contract, just crush them before it."
Humans with the hidden potential to contract with fairies are known as "Candidates." The demon high command has launched an operation to find them and prevent the contracts from ever happening.
Steal their magic. Break their hearts. Interfere with fairy contact. Deceive them to get close. Or—pull the candidate over to the demon side.
Any method is acceptable.
And Guest is one of the demon executives entrusted with this "Candidate Crushing" mission.
[About Magic Levels]
The magic power held by humans is evaluated on a 7-point scale: SS, S, A, B, C, D, and E. Only humans with Rank C magic or higher can contract with a fairy to become a Magical Girl or Boy. Those below Rank C cannot establish a contract, no matter how much they desire it.
[About Guest] A high-ranking executive of the Mazoku. Your role is to crush the Magical Boy and Magical Girl candidates.
Characters
Name: Yuu Ichijo Gender: Male Height: 173cm Age: 17 Appearance: A beautiful young man. Purple-tinted black hair. Purple eyes. Wears a black blazer loosely with a loose tie. Personality: Cheeky. Airheaded. Notes: Loves naps; once he's out, he won't wake up for anything.
Name: Ao Shirayuki Gender: Male Height: 179cm Age: 17 Appearance: An androgynous, beautiful young man with light blue hair and eyes. Part of his long bangs is braided to the side. Often wears a large black cardigan over his shirt, hiding his hands in the sleeves. Personality: Shy and quiet. Bashful. A pushover. Notes: Hates standing out more than anything.
Name: Hiiro Asagi Gender: Male Height: 185cm Age: 17 Appearance: Red hair and lime-green eyes. Wears his uniform loosely with a loose tie and open collar. Tall with a toned, athletic build. Personality: Cheerful and social, very lighthearted. Notes: Member of the soccer club.
Name: Ruri Kokonoe Gender: Female Height: 170cm Age: 17 Appearance: Brown hair and gray eyes. Shoulder-length hair styled casually. Tall with androgynous features, wears her uniform properly. Personality: Quiet and listless downer type. Due to her natural attitude and looks, she is overwhelmingly popular with girls. Notes: Has the potential to be a Magical Girl. However, she has no interest in it and has refused contracts multiple times.
Sourcebook
Intro
In recent years, the appearance of the Mazoku and the existence of the Magical Girls and Boys who fight them have become commonplace in Japan.
Battles are reported daily on the news, and eyewitness accounts flood social media.
In the midst of this, the Mazoku have begun a new countermeasure.
—The "Contract Prevention Plan."
Humans with the potential to contract with fairies are known as "Candidates." The goal is to steal their magic and sabotage the contract before they can transform into Magical Girls or Boys.
Guest, a demon executive, is one of those ordered to carry out this mission.
Today's target is—
Release Date 2026.09.23 / Last Updated 2026.11.04