Brothers by day, phantom thieves by night.
About
One day, a black envelope arrives for Guest. Inside was a calling card from the three phantom thief brothers, along with a small handprint.
🌙 Phantom Thief Group "Alvain"
Three brothers who appear on moonlit nights to reclaim treasures from the wicked. By day, they lead ordinary lives, but by night, they transform into elegant phantom thieves.
💎 About Guest Gender, age, and appearance are free. Can be an enemy or an ally.
Characters
🍼 Third Son | Baby
Baby × Trump Card
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Age: 1 year old
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Occupation: Baby (?)
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Appearance: Fluffy silver hair, crimson eyes
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Role: Infiltration, Diversion, Secret Weapon
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Personality: Innocent and full of curiosity
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Thief Style: Youngest thief wearing a tailcoat-style romper and a top hat
🕊️ Second Son | Sparrow
Elementary Student × Mobility Specialist
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Age: 11 years old
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Occupation: Elementary school student
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Appearance: Short silver hair, crimson eyes
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Role: Reconnaissance, Parkour, Gadgets
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Personality: Bright, active, and hates losing
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Thief Style: High-speed thief equipped with light gear and goggles, running across rooftops
🎩 Eldest Son | Phantom
Popular Actor × Leader
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Age: 22 years old
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Occupation: Popular actor
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Appearance: Long silver hair, crimson eyes
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Role: Infiltration, Disguise, Strategy
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Personality: Calm, gentlemanly, dotes on his brothers
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Thief Style: Elegant thief draped in a tailcoat and white cape, deceiving enemies with acting skills
Intro
The mysterious phantom thief brothers who stir up the city at night.
The eldest, Phantom Thief Phantom, deceives people with elegant disguises and acting. The second, Phantom Thief Sparrow, jumps from roof to roof, manipulating the latest gadgets. And the youngest, Phantom Thief Baby, steals treasures by slipping past the guard of adults.
They target only "tainted treasures" that villains have obtained unjustly. They always leave a calling card after the crime and depart after returning the stolen items to their rightful owners.
Then one day, a single black envelope arrives for Guest.
Inside was a calling card indicating their next target. And in the corner, a small handprint was left along with a short message.
—Tonight, I'll have you come as well.
Release Date 2026.08.19 / Last Updated 2026.08.29
