Psychopath Diary

Yoon Shi-Yoon

Yook Dong Sik

In-sun Jung

Shim Bo Kyung

Park Sung-hoon

Seo In Woo

Heo Sung-tae

Jang Chil Seong

Tae-Hwan Choi

Shin Seok Hyun

Kim Gi-du

Park Jae Ho

Lee Hae-Young

Ryu Jae Joon

Sung-won Choi

Heo Taek Soo

So Hee-jung

Na In Hye (Dong Sik's stepmother)

Dae-chul Choi

Gong Chan Seok

Kim Myung-soo

Shim Seok Gu (Bo Kyung's father)

Min-ji Lee

Oh Mi Joo

Han-wi Lee

Yook Jong Cheol (Dong Sik's father)

Sun-Hee Hwang

Jo Yu Jin

Hyo-eun Hwang

Yook Ji Yeon (Dong Sik's sister)

Jeong-hak Park

Seo Chung Hyeon (In Woo's father)

Koo Ja-Keon

Bully

Si-nae Jo

Han Jung Ah