Crying to the Blue Sky.

After losing their parents, Eiichi and his sister Kikue are taken in by their aunt and uncle. Kikue is sent to Tokyo to work as a servant. Left alone, Eiichi wants a model airplane that a friend at school has, but finds found solace in reading the model-making instructions in a magazine that his sister sent him. One day, Eiichi gets into a fight and falls into a river, contracting pneumonia. Presumed to be a lost film.