I'm at episode 5 while doing this review.
As far as I can see it focusses more to drama that its character build up became poor. Protagonist should be one of the most exciting element of it but at this level the main character couldn't move on minor problem he has and that is how evil the owner of the body is. I really think the author didn't focus on how a compassionate and righteous soul became determined and competent in an evil man's body. By not doing this, he is killing the capability of the main character to grow and to be more exciting. The plot really suffer till this episode and I'm starting to be turn off to the way it is written. I'll continue to watch this series and will give a more detailed review for those who want to watch it. Hope this help so that your time will not be wasted. This is just my opinion. I dont want misunderstanding because of this.