Psychopath diary is a Funny and Killer drama. The reason I give it a 10 star is because its so good the story/plot of it is so Smart and it make sense.
Yoon was so funny I kept on laughing because of him
The female lead was pretty good but I kinda disliked her some what out of the drama but overall they did good the acting of the killer (Sunghoon) was so good like I was shooked and scared and laughing
The chemistry between the characters are good
I liked how Subin from victon was yoons younger brother