In 1945, the second and third-year students of a Hiroshima girls' school are taken away to work in war factories. The remaining 220 girls of the first year try to make the best of their new-found status as the only teenagers in an almost deserted town, even amid the deprivations of wartime. On the 7th of August, an American bomber changes their lives forever. Broadcast on the 43rd anniversary of Hiroshima in memory of "the girls who lost their lives to the atom bomb." (Source: Anime Encyclopedia)
Hayato's home city is under attack from a gigantic robot. His parents are lying dead in the rubble and the only remaining friend is his dog. His only thought now is revenge against the owner of the Phantom Ship (from where the robot said he was sent). He ends up in the house of Kuroshio, the leader of the fight against the Phantom Ship and the most important person in the city. By complete accident, Hayato finds his way to an underground passageway where he realises that the true nature of events does not mesh with what Kuroshio has told him. His life is now in great danger, and only he can stop the plans of the evildoers.