Why Her?

Composer

• 
  Park Se Jun

Director

• 
  Park Soo Jin

Main Role

• 
  Seo Hyun Jin

  Oh Soo Jae

  Main Role
• 
  Hwang In Youp

  Gong Chan

  Main Role
• 
  Huh Joon Ho

  Choi Tae Gook

  Main Role
• 
  Bae In Hyuk

  Choi Yoon Sang

  Main Role

Support Role

• 
  Ji Seung Hyun

  Choi Joo Wan [TK Law Firm]

  Support Role
• 
  Lee Joo Woo

  Song Mi Rim [TK Law Firm]

  Support Role
• 
  Kim Sun Hyuk

  Min Young Bae [TK Law Firm]

  Support Role
• 
  Jeon Jin Ki

  Ha Il Goo [TK Law Firm]

  Support Role
• 
  Kim Jae Hwa

  Jo Kang Ja [Seojung University Law School]

  Support Role
• 
  Nam Ji Hyun

  Na Se Ryun [Seojung University Law School]

  Support Role
• 
  Lee Jin Hyuk

  Nam Chun Poong [Seojung University Law School]

  Support Role
• 
  Kim Chang Wan

  Baek Jin Ki [Seojung University Law School director]

  Support Role
• 
  Kim Young Pil

  Seo Joon Myung [Seojung University Law School professor]

  Support Role
• 
  Ji Joo Yeon

  Jung Hee Young [Seojung University Law School professor]

  Support Role
• 
  Choi Young Joon

  Yoon Se Pil [SP Partners]

  Support Role
• 
  Cha Chung Hwa

  Chae Jun Hee

  Support Role
• 
  Jo Dal Hwan

  Koo Jo Gap [Gong Chan's roommate]

  Support Role
• 
  Lee Kyu Sung

  So Hyung Chil [Gong Chan's roommate]

  Support Role
• 
  Bae Hae Seon

  Ji Soon Ok

  Support Role
• 
  Seo Jin Won

  Kim Sang Man [Gong Chan's father]

  Support Role
• 
  Lee Yoo Jin

  Gong Chan / Kim Dong Gu [Young]

  Support Role
• 
  Hwang Ji Ah

  Jeon Na Jung

  Support Role
• 
  Lee Jong Nam

  Yang Hwa Ja [Soo Jae's mother]

  Support Role
• 
  Lee Seung Bin

  Oh Young Jae [Soo Jae's brother]

  Support Role
• 
  Nam Jung Woo

  Oh Cheon Jae [Soo Jae's brother]

  Support Role
• 
  Han Joo Hyun

  Choi Jae Yi

  Support Role
• 
  Kim Yun Seo

  Lim Seung Yeon

  Support Role
• 
  Lee Kyung Young

  Han Seong Beom [Hansu Group Chairman]

  Support Role
• 
  Park Shin Woo

  Han Dong Oh [Hansu Group]

  Support Role
• 
  Jeon Jae Hong

  Han Ki Taek [Hansu Group]

  Support Role
• 
  Jo Yeong Jin

  Lee In Soo [Assemblyman]

  Support Role

Guest Role

• 
  Kim Dong Ha

  Yang Ji Ho (Ep. 1)

  Guest Role
• 
  Seo Jeong Shik

  [Ji Ho's father] (Ep. 1)

  Guest Role
• 
  Goo Shi Yeon

  [Ji Ho's mother] (Ep. 1)

  Guest Role
• 
  Kim Sang Il

  Jo Moon Yong (Ep. 1)

  Guest Role
• 
  Lee Tae Sung

  An Kang Won [Assemblyman] (Ep. 1)

  Guest Role
• 
  Park Jin Young

  [Reporter] (Ep. 1)

  Guest Role
• 
  Jeong Young Do

  [Reporter] (Ep. 1)

  Guest Role
• 
  Lee Seo Yul

  [In Soo's aide] (Ep. 1)

  Guest Role
• 
  Seo Eun Seo

  [TK Law Firm lawyer] (Ep. 1)

  Guest Role
• 
  Son Seung Hun

  [TK Law Firm lawyer] (Ep. 1)

  Guest Role
• 
  Ahn Eun Ho

  [TK Law Firm attorney] (Ep. 1)

  Guest Role
• 
  Kang Chung Hun

  [TK Law Firm attorney] (Ep. 1)

  Guest Role
• 
  Lee Do Hyung

  [TK Law Firm attorney] (Ep. 1)

  Guest Role
• 
  Han Chang Hyun

  [TK Law Firm board member] (Ep. 1)

  Guest Role
• 
  Son Seon Geun

  [TK Law Firm board member] (Ep. 1)

  Guest Role
• 
  Shim Young Min

  [TK Law Firm board member] (Ep. 1)

  Guest Role
• 
  Jang Eui Don

  [Judge presiding on 2nd Hansu Bio Chemical trial] (Ep. 1)

  Guest Role
• 
  Kim Jong Tae

  [Soo Jae's father] (Ep. 1)

  Guest Role
• 
  Ryu In A

  Oh Soo Jae [Young] (Ep. 1)

  Guest Role
• 
  Kwon Sang Woo

  Jung Hyun Soo (Ep. 1)

  Guest Role
• 
  Son Jeong Won

  [Hansu Group staff] (Ep. 1)

  Guest Role
• 
  Hong Woo Jin

  [Plaintiff's attorney] (Ep. 1, 15-16)

  Guest Role
• 
  Kwak Min Gyoo

  [So Young's attorney] (Ep. 1, 15-16)

  Guest Role
• 
  Hong Ji Yoon

  Park So Yeong (Ep. 1, 3, 15-16)

  Guest Role
• 
  Seo Jung Bin

  Choi Jae Wook [Cashier] (Ep. 2)

  Guest Role
• 
  Jung Hyun Chul

  [Student council member] (Ep. 2)

  Guest Role
• 
  Jung Ah Mi

  CEO Park (Ep. 2)

  Guest Role
• 
  Kim Ji Hui

  Teaching Assistant Park [Seojung University Law School] (Ep. 2-3)

  Guest Role
• 
  Lee Dong Gyu

  [Anchorman] (Ep. 2, 12)

  Guest Role
• 
  Jang Young Hyun

  [Seojung University Law School student] (Ep. 2-3, 5, 12, 13)

  Guest Role
• 
  Min Chae Min

  [Seojung University Law School student] (Ep. 2-3, 5, 12-13)

  Guest Role
• 
  Kim Hwa Joong

  [Seojung University Law School student] (Ep. 2-3, 5, 12, 13)

  Guest Role
• 
  Lee Jin Hee

  Shim Min Joo (Ep. 2, 9, 15-16)

  Guest Role
• 
  Min Eung Shik

  [Chef] (Ep. 3)

  Guest Role
• 
  Lee Jun I

  [CCTV room staff] (Ep. 3)

  Guest Role
• 
  Hong Sung Duk

  [Ji Young's father] (Ep. 3)

  Guest Role
• 
  Jung Jin Woo

  [Detective] (Ep. 3-4)

  Guest Role
• 
  Park Ji Won

  Park Ji Young (Ep. 3-4)

  Guest Role
• 
  Jin Tae Yeon

  [Ji Young's mother] (Ep. 3-4)

  Guest Role
• 
  Kim Min Kwang

  [Anchorman] (Ep. 3, 12)

  Guest Role
• 
  Kim Joong Don

  Do Jin Myeong [Detective] (Ep. 3, 7-8, 12)

  Guest Role
• 
  Jang Yong Chul

  Master Kim (Ep. 4)

  Guest Role
• 
  Oh Soo Hye

  [Inmate] (Ep. 4)

  Guest Role
• 
  Seo Young Sam

  [Restaurant employee] (Ep. 4)

  Guest Role
• 
  Park No Kyeong

  [Vlogger] (Ep. 4)

  Guest Role
• 
  Lee Dong Hyun

  [PC cafe employee] (Ep. 4-5)

  Guest Role
• 
  Kim Yoon Tae

  Ko Kwang Up (Ep. 4-5, 7)

  Guest Role
• 
  Jeon Shin Hwan

  Bae Sun Wook [Prosecutor] (Ep. 4, 8)

  Guest Role
• 
  Lee Chul Min

  Hong Suk Pal [Tae Gook's henchman] (Ep. 4-8)

  Guest Role
• 
  Jeon Young

  [Restaurant employee] (Ep. 4, 6, 11)

  Guest Role
• 
  Yoo Sang Jae

  Hwang [Prosecutor] (Ep. 5)

  Guest Role
• 
  Park Soo Jin

  [Doctor] (Ep. 5)

  Guest Role
• 
  Lee Sung Il

  Kang Gil Joo [Police chief] (Ep. 5, 7-8, 12, 16)

  Guest Role
• 
  Yun Seo Jeong

  [Maternity ward nurse] (Ep. 6)

  Guest Role
• 
  Song Yo Sep

  [Hansu Group executive] (Ep. 6, 10-11)

  Guest Role
• 
  Ha Young Jin

  [Doctor] (Ep. 7)

  Guest Role
• 
  Kim Ga Young

  [Doctor] (Ep. 7)

  Guest Role
• 
  Choi Hwa Young

  [Locksmith] (Ep. 7)

  Guest Role
• 
  Jeon Young Woon

  [Employee] (Ep. 7)

  Guest Role
• 
  Hwang Sung Bin

  Detective Shin (Ep. 7-8)

  Guest Role
• 
  Choi Jong Ryul

  [Barber] (Ep. 7, 16)

  Guest Role
• 
  Yeom Ji Hye

  [Anchorwoman] (Ep. 8)

  Guest Role
• 
  Jin Shi Won

  [Anchorman] (Ep. 8)

  Guest Role
• 
  Kim Sa Hun

  [Audio engineer] (Ep. 8)

  Guest Role
• 
  Hwang Jin Hwan

  [Han Dong Oh's secretary] (Ep. 8)

  Guest Role
• 
  Ryu Ye Ri

  Oh Soo Jung (Ep. 8-9, 11)

  Guest Role
• 
  Won Tae Min

  Lee Si Hyeok (Ep. 8, 12, 14-16)

  Guest Role
• 
  Kim Ji Su

  [Nurse] (Ep. 15)

  Guest Role
• 
  Son Ye Rin Guest Role
• 
  Park Jong Hui

  [Karaoke owner] (Ep. 2)

  Guest Role
• 
  Park Ki Ryung

  [Deputy Prime Minister] (Ep. 9)

  Guest Role
• 
  Jang Joon Ho

  Son [FSC Chairman] (Ep. 9)

  Guest Role
• 
  Kwon Hyuk Sung

  [Detective] (Ep. 9)

  Guest Role
• 
  Suk Yoon Ho

  Jang Jin Hyun [Presidential Secretary] (Ep. 10)

  Guest Role
• 
  Ji Sung Geun

  [Real estate agent] (Ep. 10)

  Guest Role
• 
  Cha Yong Hwan

  [Paramedic] (Ep. 10)

  Guest Role
• 
  Lee Jae Eun

  [Soon Ok's co-worker] (Ep. 10-11)

  Guest Role
• 
  Park Hui Eun

  [Soon Ok's co-worker] (Ep. 10-11)

  Guest Role
• 
  Lee Jung Hun

  [Hansu Construction executive] (Ep. 10-11)

  Guest Role
• 
  Kwak Jin

  Mr. Park (Ep. 10-11)

  Guest Role
• 
  Ma Jung Pil

  [Judge] (Ep. 11)

  Guest Role
• 
  Kim Jung Soo

  [Myungmoon Daily executive] (Ep. 11)

  Guest Role
• 
  Seong Chan Ho

  [Myungmoon Daily executive] (Ep. 11)

  Guest Role
• 
  Jo Moon Eui

  [Bereaved family member] (Ep. 11)

  Guest Role
• 
  Jung Ki Sun

  [Bereaved family member] (Ep. 11)

  Guest Role
• 
  Na Ho Won

  [Bereaved family member] (Ep. 11)

  Guest Role
• 
  Min Kyung Ok

  [Bereaved family member] (Ep. 11)

  Guest Role
• 
  Kim Han Joon

  No Byeong Cheol (Ep. 11)

  Guest Role
• 
  Yoon Sung Won

  [Detective] (Ep. 11-12)

  Guest Role
• 
  Shin Ki Won

  [Detective] (Ep. 11-12)

  Guest Role
• 
  Kim Se Dong

  [Witness] (Ep. 11, 14)

  Guest Role
• 
  Han Sun Hwa

  Kang Eun Seo (Ep. 12)

  Guest Role
• 
  Jang Dong Il

  [Reporter] (Ep. 12)

  Guest Role
• 
  Jung Yeun

  Shin Yong Hoon [Prison Guard] (Ep. 12)

  Guest Role
• 
  Kim Jin Seo

  Jang Duk Ho [Warden] (Ep. 12)

  Guest Role
• 
  Jo Eun Joo

  [Doctor] (Ep. 14-15)

  Guest Role
• 
  Yoo Young Bok

  Nam Gun Joong (Ep. 15)

  Guest Role
• 
  Lee Yang Hee

  Yu Dong Chu (Ep. 15)

  Guest Role
• 
  Jeon Jeong Il

  Kim Ji Wook (Ep. 15)

  Guest Role
• 
  Yook Hyo Myung

  Oh Hyung Seok [Minister of Justice] (Ep. 15)

  Guest Role
• 
  Yoon Boo Jin

  Lee Young Hee [Assemblywoman] (Ep. 15)

  Guest Role
• 
  Jo Nam Hee

  Jo Nam Hee [Committee president] (Ep. 15)

  Guest Role
• 
  Park Jung Min

  Park Jung Min [Social worker] (Ep. 15)

  Guest Role
• 
  Kim Jae Il

  [Investigator] (Ep. 15)

  Guest Role
• 
  Jeong Yoon Hee

  [Reporter] (Ep. 16)

  Guest Role
• 
  Park Yong

  [Judge] (Ep. 16)

  Guest Role

Unknown

• 
  Baek Shi Won Unknown
• 
  Han Su Min Unknown
• 
  Yang Eun Sol Unknown
• 
  Kwon Ye Eun Unknown
• 
  Bae Eun Young Unknown