Kou is searching for his older brother Takumi, who left home and has gone missing in the city. Worried that hes in trouble, Kou decides not to go home until hes found him, only to find him all too easily. Takumi, it turns out, has become head of the Mikuni Detective Agency, and has no intention of going back home. Kou decides that if he cant make Takumi return, then hell join the agency himself.
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