突然現れた宇宙侵略国家が人類の植民性を襲撃する一方、銀河の命運を握る一族の末裔、且つ、宇宙パイロット訓練生がこの侵略に巻き込まれながらも宇宙の平和を取り戻すストーリーが 本作・宇宙からのメッセージ・銀河大戦です。

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A sudden invasion by an alien nation attacks humanity's colonies. Meanwhile, the descendant of a clan that holds the galaxy's fate—and a space pilot trainee—becomes entangled in this invasion. Their story of restoring peace to the cosmos is this work: Message from Space: Galactic War.