Koji Tazawa

Zenigata Mei (Azusa Okamoto) is a detective who solves difficult cases using her innate intuition, wild sense of smell, and IQ of 180. She teams up with Detective Matsuyama and punishes evil with her outstanding deductive reasoning and intellect.

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Zenigata Kai appears to be a perfectly ordinary high school student. However, she is actually a secret detective who solves difficult cases one after another.

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Zenigata Rai is tracking down Detective Okano, who disappeared in the "Forest of Golgoda" in Akasaka, Minato Ward. However, she also gets involved in an incident and goes missing. Rai's cousin, Zenigata Rei, joins forces with Detective Matsuyama, who was once Okano's partner, to investigate the two cases.

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Zenigata Rei (Kaho) is a a middle school student and math prodigy that also works as a secret detective. She uses her IQ of 180 to solve the mysteries of various difficult cases one after another.

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Zenigata Rui is a high school girl with an IQ of 180 who solves cases using her cell phone as her weapon. Rui takes on numerous challenging cases with Detectives Jun Godai and Ippei Takamura.

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Zenigata Mai is a high school girl who sidelines as a detective. Her father is a high ranking police officer, so her partner Jun Godai is forced to allow her to participate in investigations, often through cellphone conversations.

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Zenigata Ai, whose grandfather is the Superintendent General of the Metropolitan Police Department, appears to be just an ordinary high school girl. However, she is actually a secret detective who solves difficult cases one after another, armed with her innate intuition and an IQ of 180. Having received a special assignment from her grandfather to solve cases, Zenigata Ai, along with her partner Detective Jun Godai, takes on numerous challenging cases.

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Kintaro Yajima comes to Tokyo and is hired by Yamato Construction Company when he saves the life of the company's CEO. A former leader of a motorcycle gang, Kintaro is known for his highly principled and forthright way of dealing with matters and is never afraid to tell his superiors exactly what he thinks. This has a tendency of irritating some; but when corruption from within the company begins to surface, he may be the only one who can stand up to it.

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