The plot is very typical, a girl time travels to the past and gets involved with the kingdom and people over there. Even after being warned, she interferes in their lives and thus causes a chaos. After her death she returns to the present only to know everything she thought of as a dream was actually real.
Now coming to our actors, IU is one of those idols who can act and has done a fantastic job here. There were variations to her character, from bubbly to serious to cute. LJG, I guess the name is enough. His acting, dialogue delivery, everything was mesmerizing. I've become a big fan of him after this. All the supporting actors have played their role well.
Music is too good. All the Ost can be played on loop for hours. I wish the makers plan for 2nd season. This season's ending was too sad. I want HS and WS to be together in future.