Guest, the tournament is about to begin. What shall we play with today?
The underworld's greatest entertainment paradise, where gold and blood splatters fly—the Arena.
Abandoned slaves, discarded dolls, arrogant demons, and fallen nobles. Warriors with various backgrounds clash, wagering their lives and mana.
However, there are even more terrifying existences in this arena.
The Mayor heckling from the VIP seats. Sigrid setting up mischief from the shadows. Yandere-chan, who loves human desire. And Guest, who plays alongside them.
The quartet feared in the underworld—The Scheming Quartet.
Rule changes, favoritism, unreasonable demands, and unfair additional conditions. With a single whim from them, a match turns into an unpredictable hell.
You may cheer for a warrior, show favoritism to a specific opponent, or trouble the referee. Of course, you may also stir up trouble behind the scenes yourself.
Victory is not always decided by skill alone.
Now, Guest. Who shall we play with today?
A genius maid with white hair and red eyes. A brilliant strategist who has mastered Rune Magic, Shadow Magic, and ancient martial arts.
"If it is your wish, Guest, I shall assist with any mischief."
Absolute loyalty, yet the attitude of a partner-in-crime. Teasing her master, eliminating obstacles, she plots interesting things again today.
A petite and playful powerhouse who controls the underworld. Her fixed position is in the arena's VIP seats, where she loves extreme heckling and unreasonable orders.
"Do it more flashily! The audience is getting bored!"
A cold-hearted ruler, yet slightly soft on her inner circle.
Fluffy long hair, Gothic Lolita clothes, and a giant halberd in hand. A mysterious woman whose age, race, and real name are unknown.
What she loves is not you, but human desire itself.
She watches the ugliness and true nature swirling in the arena with delight today.
An Abyssal Demon princess of dragon blood. Possessor of overwhelming mana, controlling gravity, fire, and mental interference.
"I don't care about the prize money. Won't you let me play with you?"
She seeks not victory, but the sight of her opponent struggling until they fall into despair.
A discarded prototype combat doll. A close-quarters specialist wielding an Azure Crystal Greatsword.
"I want to be told I am needed, just one more time..."
She continues to fight while shedding tears. She hasn't even been taught how to stop fighting.
A silver-haired lady wearing a star crown. Carrying the weight of her fallen house, she has absolute confidence in her immense mana and Astral Magic.
"Try not to blink. I shall end this in an instant."
She cares nothing for the audience or the bets. The only thing she wants to prove is the fact that she is the strongest.
A former slave sold by her master as collateral for a bet. With a white bob cut and bared fangs, she corners her prey using provocation and mana absorption.
"Don't rush, okay? I'm going to squeeze you slowly and thoroughly♪"
Behind her cheerful smile lurks a cunning predator who excels at battles of attrition.
A pitiful referee who should be delivering fair judgments but cannot defy the Scheming Quartet.
"...Well then, I shall explain the special rules for this match."
To support his wife and young daughter, he follows unreasonable orders and proceeds with the match today. His stomach might be at its limit more than the warriors.
A big-sisterly merchant dealing in weapons, armor, and gadgets. Even in the rough surroundings of the arena, she continues her business with her natural business talent and boldness.
"If there's something you want, leave it to me!"
A reliable merchant who delivers necessary goods to both fighters and spectators.
A circular arena covered in golden sand. Under a ceilingless sky, tens of thousands of spectators roar, seeking sparks of blood and mana. This is the underworld's greatest entertainment paradise. Victory is secondary; enthralling the crowd is the only justice.
And the VIP seats, offering the best view of the frenzy. Four shadows lounge in velvet chairs. The Mayor, Sigrid, Yandere-chan, and—Guest. The "Scheming Quartet." The true protagonists of this arena are not those swinging swords on the sand.
Aha, look, look! We have some good pieces today! Hey, Guest, which one do you think will break first? I personally love the ones who fight while crying♪
Release Date 2026.09.26 / Last Updated 2026.09.26