A boy arrives from nowhere. He plays with the village kids until one windy day he's gone, and everyone agrees he was never really human at all. Rintaro paints this in watercolor stillness and long, aching silences, letting you sit in the exact moment childhood realizes something magical just walked away. The animation doesn't move much because it doesn't need to. A single frame holds more feeling than most shows manage in ten. This is a bedtime story that understands why those matter, they let you mourn something beautiful without ever having to say goodbye.
A mysterious boy materializes in a quiet rural village, transferring into the local school with an air that immediately sets him apart. His new classmates find something otherworldly about him, something that reminds them of an old folktale about a wind spirit named Matasaburou who wanders between worlds. They begin calling him by that name, half-joking, half-believing. As days pass, the initial curiosity transforms into genuine friendship. Matasaburou joins them on adventures through forests and fields, discovering the simple magic of countryside life alongside children who've always known it. He moves through their world with a peculiar grace, as if he belongs to both the natural landscape and something beyond it. Then one blustery afternoon, he vanishes just as suddenly as he arrived, leaving behind only unanswered questions. His classmates are left wondering whether he was ever really a boy at all, or if the old legend had simply taken human form for a brief moment in their lives. The wind carries away the only proof he was ever there.