I just watched the preview. Finally!!!
These are my thoughts on it:
First, I am glad that we will get to see PSH in this episode and that we wont have to keep on guessing where she was.
I don't hate Eun Sang but I am angry at her a little. I hear what @Mandy says that she is only 17, but I just felt that at least she should have left a good bye note, a text message or a voicemail. Poor Kim Tan was left hanging with no explanation, nothing to go on. I just feel so bad for him.
It seems like both Kim Tan and YD are looking for her, but I am thinking that YD finds her first because he asks help from his father. His father is rich and has a lot of resources/methods that he can use to find somebody and from the preview when the father asks "Who is CES?" I got the impression that YD was asking for his help, the father asked who she was and when he heard YD response, he decides to help him. Maybe this is the first time he sees his son like this.
Second, I don't think CES calls YD first, I think he finds out her new number, leaves her a voicemail and she call him back or something.
kim Tan is doing the search on his own, with no help so it probably takes him longer to find her. I just wonder how did he get all beat up. It seems that Won is a police station with him. I wonder if he got arrested or detained after a fight.
I am looking forward to the new song from Lee Min Ho on the OST, but I am not sure why they are not talking about including PSH's new song "Break up, not yet for me". It will be perfect for episode 17 or 18!!