I appreciate the ending now. i rewatched this for the past years and it is only now that i appreciate the ending and realize what they wanted to tell in the ending.
Before, i really hate how it ended and felt like they rushed the ending. but now, it was getting clearer to me that MIRAE'S CHOICE was neither sejoo or kim shin. it was HERSELF. hence,the title of the drama(korean title is miraeui seontaek which is mirae's choice). she wanted to become better for herself and she achieved it in the last episode by becoming a successful writer and pursuing what she really wants.
although i wish the scenes were more longer but yeah. i'll give it a 5. i hate lee donggun for what he did as a person but he's a really great actor.