Not just any Korean songs, but Korean songs of the this nature:
Kinda orchestral, saddish music. Actually, come to think of it, any language is fine...hiphop kinda depressing songs. A lot of MC Sniper is like this too. Korea hiphop is the best for finding this kind of background beat/strings/orchestral kinda thing though. If possible, it would be awesome to get a youtube/download link too.
some of my favourites - remember, this is just my opinion!
Soul connection - 새벽아래 (translates into "under the dawn?")
a lot of Kinetic Flow songs are like this as well.. unfortunately they're not on youtube. if you get a chance, listen to 몽환의숲 (Forest of dreams), it was one of THE most popular song of this nature in korea, and if you listen to it, i think you can tell why.
MC Sniper - For You
Various artists - 동전한닢 remix (One penny) this song doesn't deliver that sad mood, but it features a hell lot of great underground rappers in korea. should check out ignito and fana (화나) - they've got a SICK voice.
Epik High - Let it rain
anyway i hope this was of help.. i'll post some more later if i get a chance.
i have most of their songs, but i dont know where to upload them.. tell me and i'll put them up? =D PS - they were inactive for awhile.. BUT THEY'RE COMING BACK~~
Kinetic Flow - 생과 사 <<< i dont know how i forgot this one!?
PSS - yeah the korean hip hop's english isn't too good. it's not too bad.. tablo's good o_o..
anyway more songs:
MC Sniper - 마지막 눈물 MC Sniper - 문을 열어 문으로 <<< one of my favourites from mc sniper MC Sniper - Baby Don't Cry
Outsider - One Way Outsider - Life goes on Outsider - 나락에 핀 꽃 Outsider - 남자답게
PK헤만 - Evergreen << it's good for the first while. but it gets boring
P-Type - 돈키호테 <<<<<< P-Type has amazing rhymes and beats. he's one of korea' s best "underground" rappers P-Type - Music Noir
TBNY - Truman Show <<<<<<<< TBNY's Topbob and Yankie have sick voices lol. TBNY - 왜서있어
가리온 - 소문의 거리 <<< Garion is just amazing.
Drunken Tiger - 8:45 Heaven < My favourite drunken tiger song? drunken tiger for those who don't know, is probably one of the rappers that's been most successful in korea for so long.
리쌍 - 영화처럼 < i really like 리쌍's voice too.
Epik High - One < Epik high is just plain great :D
프리스타일 - 이게 나라는 남자야 2 <<<<<<<< loved this song,, still do!
again, i have a lot more from these artists, but also others.
if you tell me into more detail what artist or song you liked in particular, i'll try and post more. this isn't even half of what i have =)