I couldn't have asked for better casting. Each actor portrayed their characted beautifully and it suited each one of them. Although some aren't used to events like this happening in the world, and can't understand why the elder brothers wife would fall in love with the younger brother, this drama is definitely in the top 10 for this year.
I love how it didn't have a clichéd ending. But at the same time I wanted them to end up together.
Overall, the casting was phenomenal, I thoroughly enjoyed the story line and acting. I will be watching again and this time I will be binging gladly.