One thing before I rave about this drama. I don't know why they called it Secret Love Affair when it wasn't a "secret". Maybe the LOVE was a secret, because the other characters were shocked at what Oh Hye Won did at the end.
This drama is excellent. Love unexpectedly blossoms through music. I can so relate to Oh Hye Won. Sometimes a person feels like they are just moving from one necessity to the next (even if she was a little greedy) with out really thinking about how you are living your life. Then some one walks into your life and changes everything. The way the director portrays every emotion through music is so wonderfully done. I love that the writer actually assumed we would know what the character was thinking. The music is amazing. I even cried. Crying while watching a drama is rare for me.
Yoo Ah In is combustible. His emotional portrayal of Lee Sun Jae was perfection. I don't know any actress that could have played the roll of Oh Hye Won better than Kim Hee Ae. I really don't know how she gave off a feel of innocence. I felt like she was reliving her youth. Good for her. I was totally invested in the main characters. The rest of the people were good too, but I could have cared less about their characters. I think that is what the writer wanted. There is no second male lead. No one for you to care about except the two lead actors.
The music is phenomenal.
I say watch it. Maybe younger people wouldn't really be in to it. It isn't action packed or anything. It is a real romance.