The Age of the Flying Boat is a 15-page all watercolor manga, originally released in 3 parts, which the animated film Porco Rosso is based on.
It's the 1920s over the Adriatic Sea. Air pirates with their floatplanes plague the sea, attacking ships, robbing money, and kidnapping girls. Enter a bounty hunter, Porco Rosso. Flying his red floatplane, he is the best in the business…