Journal d'un psychopath

Yoon Shi-Yoon

Yook Dong-sik

In-sun Jung

Shim Bo-kyung

Park Sung-hoon

Seo In-woo

Min-ji Lee

Oh Mi-joo

Tae-Hwan Choi

Sin Seok-hyeon

Koo Ja-Keon

Bully

Heo Sung-tae

Jang Chil Seong

Kim Gi-du

Park Jae-ho

Hae-yeong Lee

Ryu Jae Joon

Sung-won Choi

Heo Taek Soo

Han-wi Lee

Yook Jong-cheol

Kim Myung-soo

Shim Seok Gu (Bo Kyung's father)

So Hee-jung

Na In-hye (Dong-sik's stepmother)

Dae-chul Choi

Gong Chan-seok

Sun-Hee Hwang

Jo Yoo-jin

Si-nae Jo

Han Jung Ah

Hyo-eun Hwang

Yook Ji Yeon (Dong Sik's sister)

Jeong-hak Park

Seo Chung-hyeon (In-woo's father)