Mitsuru Fujita, a girl who loves piano, has entered high school and is sharing a dorm room with Kanade Kobayashi, a former rival who used to be proclaimed a piano prodigy. However, Kanade has come to hate piano, because of trauma she experienced when studying abroad. Mitsuru invites Kanade to play a duet on the same piano...

(Source: Houbunsha, translated)