This drama was ... well it started off funny and full of laughs, then turned into a thriller, then into a melo, then into a mystery. It was good though. I thought the writing was tight for a while. But after episode 12, things started going downhill. Not in a major way, just that the plot holes became obvious, gaping craters. What really kept me hooked was the thriller/mystery aspect. I swear, I became anxious and nervous waay too much in this drama. It was harrowing and uncomfortable when it was happening, but when the plott holes became bigger and things started to drag a little (not to mention our fav detective losing a few brain cells) I missed the nerves. Nerves indicate a good drama. The romance here was top notch. The actors did commendable work, especially Shin Se Kyung whose acting improved by leaps and bounds. She's great here. Our hero as well is flawless in his work. He was smart (-ish sometimes), funny, comforting, clingy, jealous, and bada** when he needed to be. I was of course, impressed with the progression of the romance. It developed quickly, they hugged and showed more closeness than I've ever seen in a kdrama. Also they didn't let misunderstanding cloud their judgement and halt their relationship. They leaned on eachother and stayed through thick and thin, giving eachother strength. I look for that in dramas and I'm glad I found it here. They really represented a normal dating couple. I loved their lines and their actions. But, the person who carried this show is Nam Gung Min. His character had me curious as to what he's going to do next. He was super smart, but unlike other dramas, our main leads and their colleague was smart too. It was refreshing to see a smart lead like Oh Cho Rim and the team leader. Finally! I may rewatch this. The music was fitting in every scene too. This was a good drama and it did not drag much, just the last 3 episodes. I didn't mind because it was full of fluff and I love fluff, so it didn't drag for me. Plot holes though hahahha. Watch out for plot holes after ep13.