I have been thinking of watching 'Her Private Life' again! This is probably one of the best romantic K-dramas I have watched. The fact that the show has not got lost in my fogged memory of the countless K dramas I have watched is a sign that it is a drama I can come back to. I watched 'Her Private Life' during a stressful period of my life and remember it helping me feel good afterwards. Of course, the highlight of this show is the amazing chemistry between its leads. Park Min-Young is lovely in this drama. This was the reason I was looking forward to watch her in the recent drama 'When the weather is fine' which unfortunately was not as engaging for me for some reason. I love the positive and perky character she plays in 'Her Private Life'. Both her and Kim Jae-Wook are great actors and switch between emotions effortlessly. It is their dynamic that made the show watchable even when some of the episodes towards the end were dragging. As others have pointed out, I did not find the childhood plot very convincing. I also thought that the stories revolving around some of the side characters could have been developed more but it didn't bother me much. I enjoyed the friendship between the characters of Park Min-Young and Park Jin-Joo and wish to have friends like that :).
Overall, I recommend this drama if you are looking for something light and romantic to watch. The show has compelling leads who elevate the show from being just fluff. I enjoyed watching the show and I am sure that you will too :)