This isn't a war film pretending to be educational. It's a dirge for the people who died in Osaka, rendered in animation so you cannot look away or rationalize it into history. The OVA treats each person lost as irreplaceable, each moment before the bombing as the last time someone chose what to eat, what to say, who to hold. You don't watch this for catharsis or meaning. You watch it because forgetting requires active refusal, and this film makes refusal impossible. The contemplative pacing isn't restraint. It's respect.

Osaka, 1945: the city is bombed during the war, and this single-episode OVA is an educational film about that bombing. It sets out to teach viewers about the air raids that hit the city in that year, presenting a painful chapter of the war through animation meant for instruction rather than entertainment.