I think Goo Hye Sun did a great job in the character of Go Eun Bin who is a character suffering from lack of maternal love, She closed her heart to loving anyone except music so she will never feel that pain of anyone leaving her. As much as she avoids it, love comes looking for her - two men falling for her. I personally wanted her with the CEO as they shared the same pain and understood each other's pain. If only he had pursued her like the teacher maybe they would have been together.