It's a nice classic drama. The love between the main characters is simple and evident. Their story itself flows quite well, there are no crazy plot twists and thousands of problem coming between the main characters (well, just what's needed to last the 16 episodes). All the students' stories are nicely intertwined even if the show construction - 1 case at a time - is basic, it works very well. I just couldn't quite buy Gong Yoo as a high school student... or at least not as someone younger than Gong Hyo Jin. This drama may already come off as slightly dated, so hurry up and watch it!