This is a very nice mini-show. I really liked how this differs from most of the similar themed shows out there. In this we get a FL who chooses to try and change her villain husband's opinion about her. A hard thing to do when ML is in love with someone else and the author fights against the changes.
Character wise:
FL is a stubborn and kind woman who somehow enters the novel she just read and didn’t like the ending of. As the villain's wife she gets the chance to change the storyline. She soon falls in love with him.
ML is quite strong and cunning even though he is also warm and caring. He is the villain of the novel but can’t help falling in love with his wife, thereby taking a different path than he is supposed to.
Acting wise this might not be top shelf but the actors do their best within the limited time-frame.
So, if you like a good time-travel/novel-story that is interesting and sweet, this is well worth watching.