My second time to take Air Busan to go to Busan. The departure time is 02:05, and arrived at Busan is 06:35, so you can have a whole day in Busan. So the service on an overnight flight mainly focuses on if they can give you a good sleep.
Air Busan does the job well, they dimmed the cabin lights after serving you a bun and a cup of water. They didn't wake you up for showing you their duty-free goods. Quiet, no-nonsense activity, the stewards on the flight always have their smiles on.