I am not really into teenage dramas. I was going to skip this one even though I watched 2013, but I saw so many comments in the feed that I decided to watch 2015. I'm glad I did. The plot of the story is really good, but the character development was lacking. Honestly, I didn't really care what happened to the characters as much as I thought I should. It may be because of my age and an actual teenager or younger person would probably enjoy this drama more than I did. The mystery was good, but the ending was anticlimatic. All of the actors did a good job. That little Kim So Hyun who just turned 16 is no joke. I could tell the difference between the twins Eun Bi and Eun Byul at a glance. She is a talented actress and I hope she doesn't lose that appeal as she grows up. The other actors are good too. I like Yook Sung Jae in Plus Nine Boys and he was cute in this also. I have to say though that some of these people are too old to play high school students and they look it. The music is good. I won't rewatch it, but it is rewatchable. I recommend this for a younger viewer and it is enjoyable for all ages.