Kanna, who works at a classical music management agency, is stirred by the sensuality of the piano sonata played by Guy Narisawa, the pianist she's in charge of. She thought that only Guy's performances could move her, but for some reason she finds herself feeling the same way about the Rachmaninoff played by Rihito, a young pianist who sees Guy as his enemy. Kanna thought Guy was special, but what now?!