Sul Kyung-gu as Dong-hoon

Uhm Ji-won as Mi-hee

Lee Re as So-won

Kim Sang-ho as Gwang-sik

Kim Hae-sook as Psychiatrist Jung-sook

Ra Mi-ran as Young-suk's Mother

Kwon Tae-won as Detective Squad Chief

Kang Shin-chul as Prosecutor

Seo Hyun-woo as Paramedic

Cha Mi-kyeong as Vice Principal

Jeong Min-sung as Reporter

Ahn Se-ha as Cocomong Costumed Part-Timer

Jo Bok-rae as Cocomong Costumed Part-Timer

Jo Moon-ee as Court-appointed Lawyer

Kim Ooh-jin as Judge

Yang Jin-sung as Do-kyung

Kim Do-yeob as Young-suk

Kim Jin-hyeok as Detective Seo

Jin Sun-mi as Head Nurse

Jang Dae-woong as Young-suk's Friend

Yoon Jong-goo as Mr. Kim

Jo Moon Eui as Gook-sun

Kang Hye-jung as Jong-sul

Park Eun-young as Parents' Association President

An Hui-ju as Parents' Association Member