Let's start with the story ! The plot is absolutely brilliant and very well written. It is even hard to explain given the fact it is subtile. While I was watching I was often thinking this remind of a piece of art. That kind of comedy mixed with a mystery thriller crime environnment was totally new to me and at first I found it a little bit confusind and disturbing but after 3-4 episodes, I got used to it and I even surprised muself liking the concept !
However, the middle of the drama was a little bit slow and even irrelevant. In fact, only some scenes were relevant during the middle of the drama. A couple of episodes in the middle felt like they were filler episodes. Overall, the beginning was good even though sometimes slow but it was made on purpose for the story to make sense so I can't complain, the middle in contrary was unecessary slow, and the ENDING was absolutely explosive, fire and epic ! So it's worth to watch until the end, I promise.

The cast was very well chosen. I have zero complain about the two main male actors, which were fabulous. Also the actor who have playedJang Chil Sung became my favorite character in the drama, he was very funny, I would even say he was the funniest character/actor and even his personality was so great that it's impossible to ignore it. These three actors did such a fantastic job! I was also very surprised by Jung Subin's acting which was remarkable, seriously.

The music is great, it goes with the drama perfectly so even if it is not the type of music I usually listen, there could have not been better osts for this type of comedy thriller drama.

In simple words, if you like comedy, if you like thriller, or if you BOTH, then go watch right now !