"When you can play this tune, play it for me..." Suzuno has long been looking for the boy who said that to her, whom she encountered at a piano recital in her childhood. Upon starting high school, she was selected to provide piano accompaniment for a chorus competition. Suzuno began rehearsing with Aiba-kun and Fujisawa-kun from her class, but Fujisawa-kun revealed that they had met when they were young...!?