I have recently learned to love Korean TV, having been wowed by Mr Sunshine and Crash Landing on You. I also loved Its Okay to Not be Okay. So I came to this wanting it to be of a similar standard. But it isn't. Not for me anyway.
I did not invest in the central relationship. The characters shed plenty of tears but never made me feel that their relationship was real. The story threw lots challenges and disasters their way, but none of it made me care what happened.
Having said all that, it is a moderately diverting drama, perhaps more likely to be enjoyed if you come at it with low expectations.