One of the greatest kdramas of all time! It's a very warm-hearted and incredibly beautiful story. The interrelationships of the characters on how they care for one another are very touching, dazzling and amazing. The main characters' growth and development that they achieved by relying and sharing each others' pain, experience, heart and kindness can be felt emotionally throughout the series. It made them heal their broken selves and in the end they became successful and happy. This series was first criticized for the age difference of the main leads and IU was doubting to accept the role because of the hypocrite critics who judged it without knowing the essence and full concept of the story. Luckily the series came to fruition and IU was convinced to take the role and was able to portray her character perfectly. This is not a romantic story about an old man and a young woman. This is a story regarding human life and emotions mainly about sadness, bitter experiences, facing hardships, love and striving to live and to find happiness and comfort in life with people around you. Must watch 100%!