Naoki Tomura (Kento Yamazaki) is a high school student who lives in Hokkaido. He meets piano tuner Soichiro Itadori (Tomokazu Miura) at his school. Naoki could smell the forest from the piano tuned by Soichiro. Naoki is touched by his work and begins to work at the musical instruments store where Soichiro works. Naoki develops relationships with many people related with the piano and he meets Kazune (Mone Kamishiraishi) and Yuni (Moka Kamishiraishi). They are sister pianists and high school students.