This drama revolves around some VERY HEAVY themes. I would strictly warn against anyone who is contemplating to watch this to be aware of them firsthand before they decide to watch this.
It was sometimes way too dark for me but what I think was the factor that compelled me to keep watching were the characters and the way they were portrayed so well.
Although I would say they could not flesh out the themes and all the characters well enough and the ending did not quite hit right but it was satisfactory.