it is killing me

A violin or cello instrumental theme played in the occasions, theme music for clay artist ji sung. The music is really melancholic. Played when he had a dinner with his father and ga eul. And played another time when monkey girl in swim suit hugs jun pyo. And as a maid jun pyo hugs Jan di in bed the music played again. Please anyone find the music for me. I'm searching for years. Please please please.