Overall a very fun drama to watch. It brought laughs and chills seeing Yook Dong Shik convincing himself that he is a true psychopath. I was expecting a dark thriller but the comedy aspects blended into the show really well. The story is solid and I am in love with the music. The cast was perfect and had great synergy.

You will watch Yook Dong Shik convince himself to be the owner of the diary and that he is a psychopathic killer. Seeing his internal turmoil and desire to live up to the image of his exact opposite (from pushover to predator) was a blast. While some of his psychopath shenanigans were very cringe inducing, I found myself enjoying the cringe.

The show just seems to introduce more and more misunderstandings and they are slowly resolved as you advance the story. You will laugh and you will cry. Highly recommended to watch.