At first I was hesitant to watch this, i thought it would be boring and wasting of time.
Now that i finished watching it, i don't regret it at all, it wasn't boring at all, and I really recommend it.
At the end I felt bad for professor Joo, he only wanted to protect his mother from his abusive father. I hated him, but i later realized that it's the evil spirit fault, i hope one day he gets free and live a happy life with his mother.
I also loved the chemistry between Bong Pal and Hyeon Ji
It's a really good kdrama