Overall I really liked this show. The main characters were flawed with hang-ups about their backgrounds, but generally likeable.

The best things about this show were the variety of relationships and the implications for duty, love, loyalty, and conflicts in fulfilling roles/obligations. The show put a lot of effort into showcasing how motive in a relationship can impact its success, contrasting various couples to support its philosophy.

This isn't a spoiler since it is spelled out in the summary and the first part of the show: My big annoyance was that the show would sometimes forget its own facts. Rin wasn't always a full daughter of the house - although she received the same education as the girls, she shared a room with the maid! Although one reason Saran was hesitant about Rin was because he knew she wasn't the real eldest child, he WAS tempted by Duang and continued to give her opportunities, even later when he should have figured out just how toxic/unstable she is.

The one thing missing from this show for me was that it never fully recognized that Saran gave Rin no good reason to trust in him. Given the situation, I'd be like Rin and have one foot out the door also. Still, the show did better than most at being steady paced and charming.