Natsume Yujinchou: Tamayura no Ie

A strange letter left behind by the owner of an antique shop. When Natsume enters the store, he hears the voice of a yokai!? Featuring a flute-playing yokai and another that manipulates dreams. (Source: Hakusensha, translated)

When Reiko was Takashi's age, she bound the names of demons and spirits in her Book of Friends, enslaving them to her capricious whim. Now Takashi is the owner of the book, and the creatures will do anything to get their names back. (Source: VIZ Media)