Tập 659: Các thám tử nhí cùng cảnh sát Chiba điều tra vụ phá hoại liên quan đến tình đầu

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The Detective Boys discover officer Chiba's has been vandalized with a threatening word. Realizing is the culprit is the same person who has been on a vandalism spree that month, the Detective Boys push Chiba into investigating it with his first love. (Source: TheTVDB)