If you are sick of the general type of kdramas, this one is like a breath of fresh air. It isn't too dark or serious, and it has a very likable underdog protagonist. One thing to note is that there isn't any outright romance. I've seen many kdramas where there is forced romance so thankfully this stayed clear of it. Yes there are a few scenes which suggest there could be something more, but its very subtle and its up for your interpretation. Great acting from the two male leads, and the female character is strong without shoving it in your face. The male and female main characters make a great duo, and their friendship is quite heartwarming. As for the humor, dark comedy isn't my type, but they made it work here. One thing that's done well is the main plot. Despite we knowing the real killer and the entire mystery already, it doesn't get boring or feel like we're just waiting for the main characters to catch up. There are lots of twists and turns, and it really hooks you in. Oh, and how could I forget the awesome bromance? Keep in mind that there is some violence and "dark" elements, but it isn't over the top.