전항 - Sesam Trio
Reissued tracks can be found here:
가요(歌謠) 박물관 / Music Museum 220 Best [Disc 8]
19 비야 너는 나그네 / You're a stranger (1974)
I only have this one and original track of acoustic singer/songwriter with arrangements of nicely arranged acoustic pickings and flute improvisation, sung with warm lead vocals, and further on with extra backing choir and bass/drums accents. This isn't too different from western taste for songs and song arrangements.