قسمت 15: رُی در تاریکی ناپدید می‌شود: یک پیام کمک‌رسانی سفر در زمان

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Ran goes out with Rui to a flea market, and Midori unexpectedly shows up. Rui disappears after receiving an old box from one of the sellers and opening it to find a comb. Rui is transported back in time to help a girl named O-Ran. Rui's unexpected appearance in the past, plus the comb he had pegs him for a thief, but he manages to feign amnesia. Rui learns about O-Ran's older sister who had disappeared. It turns out O-Ran's father was a comb maker before he died. Meanwhile, Ran and Midori try to find the man who gave the box to Rui. (Source: Wikipedia)