An AI theme park songstress who yearns to sing on the main stage meets a time-traveling AI tasked with stopping a future war against humans.

High school student Dai Miyamoto has his life is turned upside down the day he discovers jazz. Picking up a saxophone and leaving his sleepy hometown for the bustling nightclubs of Tokyo, Dai will find that the life of a professional musician isn’t for the faint of heart, as he must confront what it truly means to be great.