I'm pretty sure you have heard of Diana... I absolutely hated her which means she did a good job acting. I liked the plot but at times it was a bit boring. If I were honest with myself I was only watching because of jingoo. I believe they did a good job but the ending was what made people get mad about this drama. I agree that the ending shouldn't have been zero 9 leaving dada alone that was truly heartbreaking and I cried until I was dehydrated. I enjoyed the comedy in this drama it was real laughter at 3 am haha...