Mask Girl

Art Director

• 
  Ryu Seong Hee

Screenwriter & Director

• 
  Kim Yong Hoon

Main Role

• 
  Lee Han Byeol

  Kim Mo Mi

  Main Role
• 
  Go Hyun Jung

  Kim Mo Mi

  Main Role
• 
  Nana

  Kim Mo Mi

  Main Role
• 
  Ahn Jae Hong

  Joo O Nam

  Main Role
• 
  Yeom Hye Ran

  Kim Gyeong Ja

  Main Role

Support Role

• 
  Shin Ye Seo

  Kim Mi Mo

  Support Role
• 
  Kim Ga Hee

  Yoo Sang Sun

  Support Role
• 
  Moon Sook

  Sim Yeong Hui [Mo Mi's mother]

  Support Role
• 
  Kim Min Seo

  Kim Ye Chun

  Support Role
• 
  Lee Soo Mi

  An Eun Suk

  Support Role
• 
  Lee Seon Hee

  O Ae Ja [Huiseong Penitentiary warden]

  Support Role

Guest Role

• 
  Jang Won Young

  Executive Manager Kim

  Guest Role
• 
  Do Mi Yeon

  [Daehan Insurance employee in elevator] (Ep. 1)

  Guest Role
• 
  Park Mu Yeom

  [Daehan Insurance rooftop employee] (Ep. 1)

  Guest Role
• 
  Park Joon Hwan

  [Daehan Insurance employee] (Ep. 1)

  Guest Role
• 
  Hong Suk Bin

  [Police substation captain] (Ep. 1)

  Guest Role
• 
  Choi Daniel

  Park Gi Hun (Ep. 1-2)

  Guest Role
• 
  Park Jeong Hwa

  Lee A Reum (Ep. 1-2)

  Guest Role
• 
  Jung Young Ki

  Manager O (Ep. 1-2)

  Guest Role
• 
  Park Keun Rok

  "Handsome Monk" (Ep. 2)

  Guest Role
• 
  Park Ga Young

  [Daehan Insurance HR dept. staff] (Ep. 2-3)

  Guest Role
• 
  Ok Soo Boon

  Won Ju (Ep. 3)

  Guest Role
• 
  Jong Ho

  Seo Yong Jin [Detective] (Ep. 3)

  Guest Role
• 
  Heo Dong Won

  Choi Jong Hun [Detective] (Ep. 3)

  Guest Role
• 
  Seo Young Sam

  [Pastor] (Ep. 3)

  Guest Role
• 
  Park Sang Hwi

  [Reporter] (Ep. 3)

  Guest Role
• 
  Kang Sung Rak

  [Computer technician] (Ep. 3)

  Guest Role
• 
  Sung Ryung

  [Bank teller] (Ep. 3)

  Guest Role
• 
  Jeon Young

  [Kim Mo Mi's landlord] (Ep. 3)

  Guest Role
• 
  Jung Hye Kyung

  [Market restaurant owner] (Ep. 3)

  Guest Role
• 
  Lee Dong Yong

  [Police officer] (Ep. 3)

  Guest Role
• 
  Kim Gye Seon

  [Church member] (Ep. 3)

  Guest Role
• 
  Lee Young Joo

  [Church member] (Ep. 3)

  Guest Role
• 
  Jo Hyun Im

  [Church member] (Ep. 3)

  Guest Role
• 
  Shin Dong Ryuk

  [Taxi co. manager] (Ep. 3)

  Guest Role
• 
  Han Jae Yi

  Kim Chun Ae (Ep. 3-4)

  Guest Role
• 
  Kim Hyun Mok

  Teddy (Ep. 4)

  Guest Role
• 
  Kim Sang Ji

  Kim Chun Ae [Teen] (Ep. 4)

  Guest Role
• 
  Lee Jun Young

  Choi Bu Yeong (Ep. 4)

  Guest Role
• 
  Moon Jong Up

  [Prince member 2] (Ep. 4)

  Guest Role
• 
  Oh Jin Seok

  [Prince member] (Ep. 4)

  Guest Role
• 
  Lee Joon Hee

  [High school teacher] (Ep. 4)

  Guest Role
• 
  Kim Hye Hwa

  [Hostess club manager] (Ep. 4)

  Guest Role
• 
  Na Ho Sook

  [Judge] (Ep. 5)

  Guest Role
• 
  Heo Sung Woo

  [Associate judge] (Ep. 5)

  Guest Role
• 
  Kim Sung Mi

  [Handsome monk's mother] (Ep. 5)

  Guest Role
• 
  Kang Jee Seok

  Park Hyeong Suk (Ep. 5)

  Guest Role
• 
  Yoon Sung Won

  Kim Hyeon Bong [Doctor] (Ep. 5)

  Guest Role
• 
  Hwang Do Yoon

  [Bully student] (Ep. 5)

  Guest Role
• 
  Choi Ga In

  [Homeroom teacher] (Ep. 5)

  Guest Role
• 
  Kim Hee Chang

  [Kim Ye Chun's father] (Ep. 5)

  Guest Role
• 
  Yoon Sa Bong

  [Kim Ye Chun's mother] (Ep. 5)

  Guest Role
• 
  Park Joo Ha

  [Elementary school girl] (Ep. 5)

  Guest Role
• 
  Jang Joon Young

  [Reporter] (Ep. 6)

  Guest Role
• 
  Kim Ah Hyun

  [Tattoo prisoner] (Ep. 6)

  Guest Role
• 
  Kim Bi Bi

  [Church volunteer] (Ep. 6)

  Guest Role
• 
  Lee Sang Hee

  [Real estate agent] (Ep. 6)

  Guest Role
• 
  O Ji Yeong

  [Prisoner] (Ep. 6-7)

  Guest Role
• 
  Ko Na Young

  [Prisoner] (Ep. 7)

  Guest Role
• 
  Lee Hyun

  [Prisoner] (Ep. 7)

  Guest Role
• 
  Kim Ki Moo

  [Gangster] (Ep. 7)

  Guest Role
• 
  Kim Ji Na

  [Prison officer] (Ep. 7)

  Guest Role
• 
  Kim Yun Jeong

  [Prison officer] (Ep. 7)

  Guest Role
• 
  Lee Yoo Joon

  [Police officer] (Ep. 7)

  Guest Role
• 
  Kim Eun Kyung

  [Cashier] (Ep. 7)

  Guest Role
• 
  Im Yu Ran

  [Accident driver] (Ep. 7)

  Guest Role
• 
  Park Ok Chool

  [Passerby driver] (Ep. 7)

  Guest Role
• 
  O Gyu Taek

  [Camera store staff] (Ep. 7)

  Guest Role
• 
  Yoon Ji An

  [Nurse] (Ep. 7)

  Guest Role
• 
  Sung Do Hyun

  [Detective team leader] (Ep. 7)

  Guest Role
• 
  Kim Ha Neul

  Kim Mi Mo [Child]

  Guest Role
• 
  Jin Mi Sa

  [Mo Mi's cellmate]

  Guest Role
• 
  You Dong Bum

  [Detective]

  Guest Role
• 
  Jang Won Hyuk

  [Bu Yeong's friend]

  Guest Role
• 
  Jo Mi Nyeo

  [Prisoner]

  Guest Role
• 
  Song Young Joo

  [Prisoner]

  Guest Role
• 
  Goo Min Sol Guest Role
• 
  Baek So Mi

  [Mi Mo's friend's mother] (Ep. 5)

  Guest Role

Bit part

• 
  Ahn Jae Hwa

  [Prisoner 5] (Ep. 6-7)

  Bit part

Unknown

• 
  Yoon Jane Unknown