Last Operations Under The Orion (2009)

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The story alternates between the past and present, linked by a fateful song. During World War II, Japanese submarine I-77 battles an American destroyer off the coast of Okinawa. Before heading to war, the captain received a final present from his lover, the score to a song titled Manatsu no Orion. Sixty-four years later, his granddaughter discovers the score and the significance behind the song.