I guess the script writer had an unfinished business, avoid this drama if you can, it disguises as a romance, but really is a series of unexplained actions of a cold hearted woman that destroys everyone around her, do yourself a favor and avoid.
The songs are nice. There is one song in the end which sounds like Ahn JiYoung, but it might not be her.
The only character that saves that show is the warm hearted rich girl, but she is destroyed too in this drama as well.
The rich mother and her friendship with the hero's mom is also nice, but this is just moot and does not contribute to the story really as much as it could