It was bad. In the beginning it looked really interesting but the writer was on something when drama ended like DAMN HOW BAD KDRAMA CAN BE . This type of drama could have been way better I feel like I could have written better story than that (ps if I say that it's really bad because I am the worst writer ) see acting was just okay I mean it could have been better whatever with that budget and actors they could have produced way better series
Spoiler
I get that ending showed some revenge but like seriously the whole drama was based on revenge and there was no proper revenge and the author was like oh i forgot to put revenge even THOUGH ITS REVENGE BASED STORY and just showed ending with revenge