This is one drama which is hard to find fault with, part of which is probably because of its length. The story would have been very difficult to make a full-length drama out of, but four episodes - more than the length of a movie - was about perfect for the scale of the story, allowing for character developments and a sequence of events which a movie wouldn't have had time for. Speaking of character developments: this some of these drama's characters didn't bail out on me the way I thought they would. All of the characters were eventually expanded to be more like they ought to be under the circumstances - and I felt like all of the characters were given a genuine chance at being 'good people' in spite of how, as a watcher, I initially wrote them off. Very fulfilling in that aspect. After having watched Park Min Young in this, my respect of her as an actress is rather better than it was before. I'd only seen her in City Hunter before, but my opinion of her acting was that it was somehow lacking. However, after watching her in Running Gu, I am reminded of the truth that if a script doesn't quite have a character right, it's very difficult for an actor/actress to make up for it. Not to say that City Hunter's script was a bad one, but that Park Min Young's character in City Hunter was more difficult to feel along with than the character she had in Running Gu. As for the other actors: The main fellow was pretty good, though there were just a few moments here and there which didn't seem quite spot on. The second male actor did a good job. Supporting actors performed well: I loved Dae-gu's two running hyungs and their coach :) I liked the foremost threesome a lot - and really, the way that this ended was perfect. I couldn't have hoped for a better ending. Do watch. It's a worthwhile drama without all of the extra twists and illogical additions which longer dramas are often obliged to put in to take up time.