It's a typical cliché drama

Leads have zero Chemistry between them
Kim Ha neul looks so old.
I just felt like there's at least ten year gap between Kim Ha neul and Jang seung jo
Also she has zero chemistry with Yeon woo jin.
I just felt that if they casted Someone younger instead of 46 years old Kim Ha neul or someone Older than both Male leads there would have been some natural chemistry between them.