In 1987 Tokyo, a quirky and sensitive 11-year-old girl copes with a terminally ill father and stressed-out working mother while encountering various adults dealing with their own struggles.

In 2003, Okinawan high schooler Miu gets interested in Minato-senpai, who has just lost his both parents. She cheers him up by exchaning MiniDisk mix tapes with him. They start…