One word. Addicting. I could not stop watching this the moment I started it. I loved the tension between all the characters. The jealousy, the revenge, the politics of hierarchy- everything that you can see in a real society in real life. There were certain moments where I actually wanted to slap the director and ask why they made a certain part, but those moments were pretty rare. After The Legend of the Blue Sea, this is my all time favorite. Park Shin Hye slayyyyyyed her character and I am so glad she was casted for the part. The acting was phenomenal and I have rewatched this multiple times.