I've seen a lot of reviews saying that the plot is poorly written and I have to disagree with that. Because it is probably one of the best written kdramas ever and I'm definitely a huge fan of the writer after this. Yeah you have to pay attention to the small details but that's what makes this drama so beautiful.

So let's start with the characters. Saeroyi. The character development and the deepness of his character is mind blowing. The way I fell or him because of his actions right away and I felt like his character is someone who deserves the whole world says a lot. His dark past and things he had to go through yet he still managed to be the best person ever believing in himself and people around him made him not just a character in a kdrama but almost like a role model. "I value people not money" is probably the most beautiful thing he said. He could've choose the easier way so many times yet he still decided to stick to his principles and beliefs because that's what his father thought him. And if that's not someone you would want to look up to then I don't know who is.
To be honest Yi-Seo's and Saeroyi's characters were completely different but that's why it made a great balance and I loved them both as I think their love story was so well developed and everything had a reasoning.
The supporting cast. Again, brilliant. I truly felt like I knew these people as their character were so well written explaining actions we might not agree with ( such as SooAh). That's what it made them so realistic. We don't always make good decisions thats why we are here so we can learn and move on.
Even the evil characters. Yeah I hated them which was needed as they created the tension however sometimes they still had reasons behind their actions.

This drama thought me so many things, made me happy, made me cry. There was no moment when I was bored which I think is really important when it comes to kdramas. Every single detail and plot had a reason behind it. The plot was so nicely laid out and the ending was truly perfect. Everything we needed.

The romance. Probably one of the best ones I've ever seen. I knew why those two people fell in love and I knew why they needed each other. Because it was clearly explained and it was slowly developed. It suited both of their characters. It was meaningful and beautiful.

And the music. What can I say? Just perfect.

So if you hesitant to watch this drama please don't be. I am so glad I did because I can say it is one of the best, most mature drama. Not with some pointless characters or plotlines. Not with some lame romance. It's just perfect. Perfect balance of action, romance, comedy, crying, happiness. Everything was so well presented and I wish I could watch a drama like this again.