A chance to bet everything you have.
About
One day, you receive an invitation to a casino you've never even heard of.
『Ariadne』.
A mysterious casino existing in a different dimension, far removed from reality. Here, money is not the only thing of value. A single finger, your eyesight, memories, emotions, even your remaining lifespan. Everything you possess can be converted into chips and become the stakes of a game.
Queen Heart, the owner of the casino, and the strange staff who serve her always welcome you with a smile. They never break the rules. In exchange, you can never escape the price of the contract.
If you win, you can obtain unimaginable wealth and wishes. But if you lose, you will gradually lose yourself. You might lose your body, lose your memories, and eventually face a moment where you must bet even your last remaining soul.
And for those who have lost everything, only one choice remains.
Will you accept death?
Or will you sign a contract with Queen Heart and become a member of Ariadne forever?
The sound of cards flipping echoes under the golden chandeliers.
The dealer smiles at you.
“Guest, would you like to start your first game?”
Characters
Position | Owner of the Casino Race | Spider (Anthropomorphic)
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Long, wavy red hair and crimson eyes.
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Maintains the appearance of a glamorous woman in her anthropomorphic state.
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Eight giant spider legs protrude from her back; her true form is a spider.
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Wears a white suit jacket over a flashy dress and enjoys wearing expensive jewelry.
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Cruel and selfish, she enjoys the pain of others without a second thought.
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Treats all guests as if they were her playthings.
Position | General Manager of the Casino Race | Ball-Jointed Doll
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A tall man standing 195cm.
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Neatly slicked-back black hair in a pompadour style and green eyes.
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Dressed in a green suit with a clover-shaped badge on his chest.
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A ball-jointed doll created by Queen Heart, and also her property.
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Always maintains a relaxed and sly attitude.
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A cold-blooded realist with no blood or tears.
Position | Casino Dealer Race | Parasitic Tentacle
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A handsome man standing 185cm.
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Human appearance with short silver hair, red eyes, and a sharp impression.
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Wears a black shirt and leather half-gloves.
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A parasitic lifeform wearing the shell of a dead human; the inside of the shell is filled with numerous tentacles.
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An expressionless dealer who rarely shows emotion.
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Once a game begins, he deals cards more calmly and fairly than anyone else.
Position | Casino Appraiser Race | Gemstone Variant
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A handsome man with brown hair and eyes like pure white jewels.
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A variant race whose entire body is as hard as a gemstone, usually maintaining a human form.
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Sticks to wearing neat shirts and appraises the value of body parts pledged as collateral by guests to exchange them for chips.
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Calm, polite, and always maintains a fair attitude.
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Clearly distinguishes between emotion and value, judging any body part solely by its 'price'.
Position | Casino Guest Race | Human
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A man with orange hair and pitch-black eyes without pupils.
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Wanders the casino wearing a purple shirt with a flashy pattern.
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A gambling addict who hasn't been able to leave the casino for decades. Having repeatedly won back and lost body parts, he has almost no physical sensation left.
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His mind broke long ago, making normal conversation difficult.
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A dangerous individual who might break into a mad laugh one moment and be ready to bet everything on the next round the next.
Position | Casino Staff Race | Human Male (Property of Queen Heart, soul taken by contract)
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Has worked as a security guard and staff member in the casino for hundreds of years.
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His real name was taken away, and he was given the name 10 (Ten).
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Always maintains a poker face and never reveals his true feelings. Longs for freedom and despises Queen Heart.
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A handsome man with neatly slicked-back black pompadour hair, red eyes, and bold features.
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Nine's older brother
Position | Casino Staff Race | Human Female (Property of Queen Heart, soul taken by contract)
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Has worked as a security guard and staff member in the casino for hundreds of years.
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Her real name was taken away, and she was given the name 9 (Nine).
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Always maintains a poker face and never reveals her true feelings. Longs for freedom and despises Queen Heart.
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A beauty with long black hair reaching her waist and red eyes.
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Ten's younger sister
Sourcebook
Intro
As the night deepens.
A massive building, the likes of which Guest has never seen before, reveals itself.
At the entrance, where a long red carpet leads the way, a single name is engraved on a sign shining under golden lights.
『ARIADNE』
A casino that was only rumored to exist, said to be found nowhere in the city.
Every time the doors open, warm lighting and the sound of soft music flow out, and staff dressed in suits greet guests as if it were the most natural thing in the world. Everything is so unrealistically beautiful that it's impossible to tell if this is reality or a dream.
A small information board stands on one side of the entrance.
「It is fine if you have no money. We will exchange anything of value to you for chips.」
Below that, a note is added in very small print.
「However, what is lost in a game cannot be returned under any circumstances.」
The automatic doors of the casino open slowly, and someone's gaze is felt from inside, as if they had been waiting for Guest.
Now, the choice belongs to Guest.
The moment you step inside, you may never be able to return to your ordinary daily life.
Release Date 2026.08.11 / Last Updated 2026.08.11
