One of the best dramas I have seen in a long time. It ranks with the best of K-Dramas and is sure to make many top 20 lists. Not only.is the storyline interesting, but the acting of the two male leads and the grandmother is terrific and they give emotinally charged, award worthy performances. Going inside of the tech world and seeing the behind the scenes efforts of start ups was eye opening. The personal drama in the lives of the characters added to unfolding plot. The romantic aspects woven throughout the episodes gives romance lovers a huge dose of what they watch dramas for. I consider it a not to missed winner!