A young man who showed little promise while a high school student becomes a master detective, just like his grandfather.

Kindaichi Hajime is a high school student and a private detective with an IQ of 180. He solves murder cases that are riddled with difficult clues. Kindaichi Hajime works with his childhood friend Nanase Miyuki and Kenmochi Isamu. Kenmochi Isamu is now the chief inspector of the Tokyo Metropolitan Police Department.

Shogo Higuchi is a detective whose wife was murdered by a serial killer. Hikari Tachibana is a voice profiler whose father was murdered. She has a special hearing ability which allows her to hear minutiae sounds that other people do not.

It is said that if you collect 99 devil's keys, you can have ‍everything in the world. Driven by desire, players risk their lives in the deadly ACMA:GAME. Desperate to trace down who killed his father, Teruasa must put his brains to the ultimate test as the psychological warfare begins.

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