hallo! I'm a lurker for quite awhile...
with my incredible hearings I've figured what the song was....it's Janis Ian - at seventeen
the song lyric fits really well for this series' theme, specially for DH, JH & JA (love) life. reading the song lyric, it make me think and have more understanding of why DH married YH and why his life was so pitiful at this point.
I'm still mad at people comments at dramabeans, blamming DH's Mom for YH unhappiness and feeling outcasted from the Hoogye neighbourhood (watching this series from my east asian's social norms POV, YH annoyed me so much)