Ai wa Sora no Kanata ni(1972)

Ai wa Sora no Kanata ni

A story set in 1943, during the Second World War. Yuki, 16, and Noboru, 20, vow their love, but Noboru is called up. Noboru's younger brother Osamu falls ill, and a lieutenant who wants to marry Yuki offers to admit Osamu to hospital...