Barrage on the Battle Star) is a Japanese manga series written and illustrated by Kōhei Horikoshi.

The story follows Astro, a dim-witted but kind young man from the slums, on a journey across the planet of Industria.

On the planet of Industria where aliens fight with humans, a young slum dweller Astro works tirelessly to feed his adopted brothers and sisters.

Distraught, he accidentally meets his doppelganger, the runaway Prince Barrage of Industria, who wants Astro to act as his substitute.

Astro decides to assume the role of the prince of Industria to prevent arousing suspicion from enemy aliens and protect his beloved "family".