Natsume's Book of Friends

Soundless Valley (5x6)

Air date: Nov 09, 2016

While out on an errand for Touko-san, Natsume is caught by two hairy-ball youkai, who influence him with dark energy and make him unable to speak. He is rescued by a bird-like youkai name Hidaka, who takes him to her "nest" in an abandoned valley.