This was 2018 rewatch -- reminded of it after trying to watch the Seven Faced Man -- and comparing the story.   I could not get Ji Sung's incredible acting and the impact it made on me emotionally when I viewed it the first time in 2015.  Watching week by week you sometimes forget the incredible scenes and storyline.  However, marathoning this drama just reminded me of why I believe this will be my all-time top K drama.    Acting - children and adults -- over the top good;   Editing -- perfect;  Music -- exceptional -- I don't buy music at my age but I downloaded the song Hallucinations to play when I'm walking.   It is one of my all-time favorites.  The best part of this drama is the creativity of the story -- not a dull moment -- a full story from beginning to end.   A story with mixed emotions - you laugh out loud -- a lot,  and you cry buckets of tears along the way.     There were so many life's lessons shared in this drama that you almost need a notepad to keep track.  I am still trying to watch Seven Faced Man -- but like most remakes of outstanding dramas they will continually be compared and the bar was set to high with Ji Sung, Hwang Jung-Eum and Park Seo-Joon casts as lead actors.  A good rewatch for the New Year's weekend.