This show had such a good start that I expected it to follow up until the end...it didn't. Let's first get that out of the way. When it comes to the story, it was quite the interesting premise with decent amounts of romance, comedy and murder. However, whereas in the first ten episodes it flowed well, in the last few it just got so hasty and rushed that they've accumulated gaping plot holes that just blew my mind with how stupid they are. It's kind of disappointing if you figure out the ending few weeks before the drama is over. Writers, come on. We're not that slow. The acting was good, I liked Park Yoo Chun in this role, nothing too stellar about it, but his character had a cute personality. Shin Se Kyung did okay, albeit a bit bland but I guess she had to fit into the confining outlines of her very limited character. I liked Yoon Jin Seo's acting and especially her character because she executed her well. But, all of these pale in comparison to the main antagonist because his acting is very chilly and I'm kind of disappointed that they didn't him enough justice, I think he was far more complex than the few scenes they gave him as a form of character exploration. The supporting cast was good, though I mostly didn't get the point of the comedian unit...it just faded off into background at some point and I forgot about it until the end of the show. Music was okay, nothing was timed too awkwardly and I liked the dangerous undertones of the serial killer scenes, though I think it was a bit showy in the dun dun dun way. Personally, I would not watch this again, "mystery" has been resolved pretty soon and since that was the main point of this drama I don't see anything I'd like to rewatch here. There's few commendable things to point out here, from a great villain to a pretty fast and natural romance, quick murder case solving, comedy breaks; it really had a great mixture of things to offer. But, it also has a lot of writing mistakes. They undervalued the antagonist, especially in last few episodes; it felt like they suddenly dumbed him down. The police unit was far too lax about everything and relied on unarmed civilians to complete stuff for them while getting them in danger too. Main couple had little chemistry and was far too cheesy, especially in last two episodes...I kind of caught myself thinking if it's the sama drama or have they changed the script writer because that was really weird to watch. I was really conflicted while watching the last episode because I found myself thinking that a show that I happily waited for each week suddenly felt like a chore that I had to complete. Bearing all of this in mind, the rating is as it is mostly because of first ten episodes and though they very obviously rushed the ending I generally enjoyed this drama.