![](https://i.mydramalist.com/4zolZ_4t.jpg)
![](https://i.mydramalist.com/2g4yWt.jpg)
-Both have a seriall killer and from the beginning we know who that is
-Both are Black comedy
-Both main leads define themselves as a killer
While watching Inspector Koo, it just reminded me of Psychopath Diary.
-Both are Black comedy
-Both main leads define themselves as a killer
While watching Inspector Koo, it just reminded me of Psychopath Diary.