Love it. Would be in my top 10 Kdramas. The characters, the feeling, the music and everything were perfect. Would definitely rewatch and Seo In Guk is stunning in this role, not much words from him but his eyers and smile...omg...the kiss...was one of it kind...
Not much to complain from me, this is ultimate love story. If you watched and loved Goblin and A Korean Odyssey this one would be your favorite too.
Just few minor:
1. Sad ending would be more suitable but as happy ending advocate should not complain lol
2. Would prefer it to be shorter around 10 episodes just with main couple only. 1-6 episodes are masterpieces that I already rewatched few times.
3. The second couple was too ordinary and in my opinion not needed here...I skipped all their parts and rewatched all main couples parts hundreds of times...