Okinawa's isolated island of Iwado has seen a growing movement advocating a return to an autonomous government. Fukai Ao, a 13-year-old boy with a missing father, lives on the island with an old doctor named Toshio and is about to enter middle school. Ao's mother was taken away a decade ago by unknown individuals. Arata Naru, Ao's 13-year-old childhood friend, lives with her…