I‘ve just finished watching all 16 episodes on Netflix and I was speechless. I‘m quite picky to watch korean series, but this one is extraordinary! I love all characters, I love all actings, I love the story, and all everything positive about this series. Unlike many korean love-story series, here I have learned many new things about human psychology, relationship, and particularly that it‘s okay to not be okay.. showing vulnerability is not a sin, but a bless, because that means we still have a heart. When someone has a heart, there is much probability to love and be loved and be happy! Our task is to find that someone who has the key to our heart to open and let all the pain covered by many new happy moments. For those who haven‘t watched, I highly recommend to watch this series to learn many things about love and life!