As near perfect of its type as you can get, this drama. It certainly grabbed my interest, with good mystery and acting from the start, although I really do not like dramas with psychopathic characters~~they cause huge damage, not just at the extreme end of murderers, but to other human beings in day to day life. Seo in Guk in character totally different from King of Hi School and works brilliantly. Also Jang Na Ra, I did not at first associate the teacher in School 2013 with her in this setting, though the character is similar. There are lots of comic interludes between the murder and mystery and the support characters of the crime team are good fun. I like the "team leader", with his self-confident bravado and his mournful look when things do not go quite according to plan but his character also developed in the course of the series. My only reservation was how the romance "on-off" worked and the end, which did not seem realistic to me. Apart from this, the plot was worked out at the end in a very accomplished and masterful way. The music was very moving. I do not usually re-watch, but putting this at 9 as this may be an exception in the future. Congratulations to actors, producer, director but above all the brilliant writer.