Shu has only just begun playing the piano, but working with Akari who lives in his left hand, he continues to grow at a rapid pace. Their performances even influence Akari’s father, his instructor, and the other world-class pianists around him. Shu and Akari resolve to study abroad to someday stand shoulder to shoulder with them on the world stage. They then return home, starting their new lives as terrifyingly talented high school pianists…?!