This is a very heartwarming drama, I really enjoyed every episode of it. The family and friendship dynamic are amazingly shown in this drama that really made me remember all of my precious high school memories. Forgiveness is one of the themes you can get out from this drama as it revolves around many misunderstandings and lies ( or concealment of the truth & framing). There is a love triangle here but it doesn't affect the drama in a negative way. Although I'm not sure if it was an image of Jung Won or Hae Sung really came back at the end, either way, it would have been a good ending as the writer did use like 3 or 4 episodes to prepare us for it a tearjerking moment.