From “Tekkonkinkreet” director Michael Arias, “Sunny” is a moving narrative set in 1970s Japan. The film takes viewers inside Star Kids, a foster home that’s a sanctuary for children caught in the cracks of society. Told through the eyes of its young inhabitants, Sunny explores the fragile strength of found families and childhood resilience. Though still a few years from completion, the project already signals the return of a masterful voice in anime cinema with a poignant, socially resonant story.