excited - boring - a little excited - boring - excited

At the first episode I was really interested in knowing how they connected and had a little high hopes for the story. But, in the middle of the episode I feel bored because the story feels forced to be long. Towards the end of the story then this drama feels exciting again. I think this drama is too focused on the main story and does not develop side stories to make this drama more exciting, and the locations are less varied.

but i realized that the female cop has really good acting skills... and kayoung's smile is so cute.