Phlebas

Thanks a lot, but I've meant the background song when they are drinking beer...found it finally: https://www.youtube.com/watch?v=_P31Fezdvig ...a rather generic retro pop song, still somehow charming ... Maybe they used it because of the lyrics "We can do anything that we wanna do
Long as you got me and I know I got you"

Does anyone know the song playing in the background at the 9- to 10-minute mark of episode 11?

Does anyone know if the gayageum piece from episode 9 is available anywhere? Can't find it on the OST.