What I honestly liked about this drama was that the plot was somewhat logical. The acting was believable and there were no cringy or overly absurd parts which would have made me want to end the series (which is quite unusual for a BL series). The settings were also beautiful and there was a lot of thought on the color scheme which was a very nice thing. The emphasis on the color blue gave the whole series a sort of calming and relaxed aura and at the same time mirrored the characters' emotions.
This drama is quite different to the usual BL dramas as the main characters are actually unlikable. There is a lot of cheating and the "good" people forgiving them over and over again. The main couple are sort the antagonists of the story and you can't help but feel weird about them getting together at the end.

In conclusion, this drama is definitely something you should watch. The setting and how the story flows forward is definitely worth watching but just be prepared to be disappointed by the characters' actions.