Natsume's Book of Friends manga volume 27 features story and art by Yuki Midorikawa.

A beautiful white dragon has been shedding luminous scales in the skies over the neighborhood, but Natsume has never seen them land. When the mustachioed yokai Chobi breaks his beloved mother-of-pearl comb, Natsume decides one of the rare and lovely scales would make the perfect replacement! His quest to find one, however, ends up uncovering more than expected...