Rivendale City evokes a sense of longing and awe in all who visit. It was also the hometown of Okano Makoto and his younger sister, Hinata. They returned to this place to search for their mother who vanished abruptly. Their old companions and childhood friends greeted them warmly. Makoto started to observe something significant through their interactions. With the sound of a harmonica, and with thoughts lingering in their hearts, an extraordinary story unfolded within this enigmatic town, in the quiet streets tonight.
