Watch on HDtoday. The 30-minute film centers around a group of high school students who became nurses called Himeyuri and served during the Battle of Okinawa during World War II. The Himeyuri Alumnae Incorporated Foundation, which runs the Himeyuri Peace Museum in Okinawa, produced the film with the aim to convey the experiences of those high school students, many of whom lost their lives during the battle, to children.