빨간 마후라(1964) / The Red Scarf ( Ppalgan Mahura )

A veteran flight instructor introduces a new pilot to the widow of a fallen comrade, half expecting the two to fall for each other, which they promptly do. Cockpit combat footage alternates with that quieter romance, building to a mission not everyone flies home from.

Why it's free: Free on the Korean Film Archive's own channel; the national archive holds and restores the prints it publishes.