To really understand the beauty of this drama, you need to open your heart. These are like real people with real problems. This is not your usually rom-com where everything has happy ending and easy relationships. In life, it is never that easy. I found few comments from people who understood message of the drama perfectly and what you get from this masterpiece. If you don't understand it, maybe you are not ready to fully accept other people pain.
,,She helps him breathe. He's worried about breathing if she's not there. What an extraordinary bond they have developed.
What makes this drama so beautiful is because we get to see what human nature really is. Good people have bad sides. Bad people have good sides. In the end, we're just trying to survive and to what surviving means is up to us. Dong Hoon just wants a quiet life and someone to understand him beneath all his taciturn personality. Ji An just wants to be understood and be accepted despite her dark past. Jung Hee just wants to love and be loved in return. The monk just wants to seek true happiness. Older brother just wants to make their mother rest in peace. Youngest brother just wants his love to finally heal the wounds he made and make her come out of her shell. Wife just wants to be part of Dong Hoon's life and relieve her loneliness. CEO just wants to keep his title and love carelessly. Kwang Il just wants peace from all his guilt. If we look at it in a certain way, human desire is not entirely bad. In the end, how we come to achieve what we desire becomes the denominator. That's why this drama is so beautiful. It makes us think. It makes us review all the choices we make. Did the choices we make in the past makes us our person? Is it right when our intentions our good but we do it in a bad way because we have no choice? This drama hits us real hard because it shows us what really there is: life in its raw, cruel and bittersweet form."