In the final years of the Tokugawa shogunate, in Kyoto, Osan and her companion Yahē were seeking shelter from a sudden downpour at the Chion-in temple gate. There, they witnessed a country-born young samurai named Murao Mayumi being kindly shown the way by a warrior also taking refuge from the rain. Yahē later told Osan that this warrior was the famed Kurama Tengu.
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