Tập 4: Nhóm tìm kiếm cô gái mất tích Irene Doala trong rừng Yokohama, nơi cô ẩn náu trong một hang động cùng Sherlock và Kokoro.

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Milky Holmes and G4 are informed about a girl named Irene Doala who went missing in the Yokohama woods. While searching for her, Sherlock and Kokoro become separated from their respective groups, winding up in a cave along with Irene. Irene explains she got lost while finding a treasure chest so she can stop her father's company from going bankrupt. When a bear attacks them on their journey back, Sherlock makes several failed attempts to rescue them only be coincidentally saved by an unexploded bomb. They are later found by G4 and returned home. (Source: Wikipedia)