D.O. and Nam Ji Hyun both did a wonderful job. Their parts were written so well. D.O., as the crown prince, had the hauteur that you'd expect from royalty. Even when his memories were gone, it was ingrained in him. Yet, there was a loneliness and vulnerability and you could feel his want of family. His facial expression was pretty flat through most of the show, but he has such expressive eyes. Nam Ji Huyn - how can a woman be so beautiful with no visible means of mascara on her eyelashes? Normally, makeup is used to enhance looks, but she doesn't need it. Her character was spunky, industrious and extremely likeable. To be honest, I've loved her in everything I've seen her in. Their chemistry together? Off the charts! I loved the scenes when they shared the screen. Everyone in the show did a good job, but I had to deduct points for two reasons. First, there were just too many evil guys in this drama and they all looked alike (that's my problem with period costumes). Evil men, evil women, evil groups, evil sub-groups. It left a sour taste in my mouth on the heels of the lovely romantic scenes. I had to deduct another point for the last episode and the tie-up of the relationship between the leads. She was strong throughout this show, and she always seemed to have a good sense of self. However, she suddenly did a 180 turn and pulled out the "I'm not worthy of your love" card. It didn't ring true, especially after the heart-wrenching scenes of each of them living separately. And her saying she'd marry that other man? Um, no. It felt to me like they pulled in a separate writer for the last episode and the flow was lost. There was a happy ending, but they waited until about the last five minutes to tie everything up. I was so disappointed after all the time I had invested in watching their relationship develop and unfold.