Ji Seong

Cha Do-hyun / Shin Se-gi

지성

Hwang Jung-eum

Oh Ri-jin

황정음

Park Seo-jun

Oh Ri-on

박서준

오민석

Cha Ki-joon

김유리

Han Chae-yeon

Kim Young-ae

Seo Tae-im

김영애

Shim Hye-Jin

Shin Hwa-ran

심혜진

김용건

Cha Geon-ho

안내상

Cha Joon-pyo

Myung Se-bin

Min Seo-yeon

명세빈

Ko Chang-seok

Dr. Seok Ho-pil

고창석

최원영

Chief Ahn Gook

Kim Hee-jung

Ji Soon-young

김희정

박준규

Oh Dae-o

김나운

Yoon Ja-kyung

김일우

Cha Young-pyo

Kim Hyun-ju

Baek Jin-sook

Baek Chul-Min

Alex Kang

김형범

Chief Choi

Cho Chang-geun

Kang In-kyu

강봉성

Shin Seon-jo

Choi Hyo-eun

Joo Mi-ra

Kang Soo Jin

Lee Young-seon

Seo Yi-an

Hong Ji-sun

윤주

Jennifer

매튜 다우마

Jennifer's Father

Jung Eun-pyo

Psychiatrist

정은표

간미연

Girlfriend

Woo Hyeon

Mental Patient

우현

Koo Jun-yup

Club Paradise DJ

Cho Yoon-ho

Leather Jacket Biker

Kim Seul-gi

Heo Sook-hee

김슬기

Lee Si-eon

Dr. Park Min-jae

이시언

허지웅

Omega's Editor

Carson Allen

Cha Do Hyun‘s high school classmate