TvN drama series “Psychopath Diary” starring Yoon Si-Yoon, Jung In-Sun & Park Sung-Hoon. The teaser begins with the voice of Yoon Si-Yoon as he states in Korean “The only clue to bring my memory back. This diary is telling me that I’m a serial killer.” Meanwhile, below are still images of Yoon Si-Yoon in the drama series. The scenes depict his character as being a pushover at work and he doesn’t get along with his co-workers.






“Psychopath Diary” first airs November 20, 2019 in South Korea.