When high school student Tomura Naoki met piano tuner Itadori Soichiro at his school in Hokkaido, he could smell the forest from the piano tuned by Soichiro. Touched, the boy decides to work together with Soichiro at his musical instruments store. Naoki develops relationships with many people related to the piano and he meets sister pianists and high school students Kazune and Yuni. Adapted from the novel "Hitsuji to Hagane no Mori" by Natsu Miyashita. The novel won the 13th Japan Booksellers' Award in 2016.