Houkago no Pianist
The heroine is Remi who is a pianists of genius, high shool girl. But she cannot do study at all. The exercise is also similiar. She likes teasing a childhood friend Sora. Only when playing the piano, she doesn't play. She thinks that she can live if there is even a piano. But she is hungry when she plays it. She's playing everyday with friends of a piano club. (Source: Volume Cover)
