Piano no Mori, the Piano Forest, an old mysterious magic piano left unattended on the edge of a suburb of “ fireflies ” where everything seems already written; It is there where all begins, where the game starts for the one who will become one of the best pianists of his “ time “; in his fantastic magic world; The Perfect World of Kai. The first part tell us about his childhood, his life and that of some of his friends, while the second part already adults and ready to face the challenges of their journey.