This is my favorite K-drama because it is perfect in all senses: acting, OST, story, characters..... I cried so many times watching this series. It is a hidden gemstone.
Main actors, IU and the amazing late actor Lee Sun Kyun (R.I.P), shone and showed they were perfect for their roles. Each one of the supporting actors made many positive contributions with their side stories to the growth and development of the drama and in the end, you fall in love with all of them, as a whole big family full of love and emotional support.
The OST made me dive into the story even deeper. It is so touching! And after LSK death, it all makes even more sense to me.

It is a masterpiece that everyone into emotional dramas should watch. You won't regret about it! 10/10