Once Again

Director

• 
  Lee Jae Sang

Screenwriter

• 
  Yang Hee Seung

Main Role

• 
  Cheon Ho Jin

  Song Young Dal

  Main Role
• 
  Cha Hwa Yun

  Jang Ok Boon

  Main Role
• 
  Lee Jung Eun

  Kang Cho Yeon / Song Young Sook

  Main Role
• 
  Oh Dae Hwan

  Song Joon Sun

  Main Role
• 
  Lee Min Jung

  Song Na Hee

  Main Role
• 
  Lee Sang Yeob

  Yoon Gyu Jin

  Main Role
• 
  Oh Yoon Ah

  Song Ga Hee

  Main Role
• 
  Lee Cho Hee

  Song Da Hee

  Main Role

Support Role

• 
  Baek Ji Won

  Jang Ok Ja [Ok Boon's younger sister]

  Support Role
• 
  Im Jung Eun

  Sung Hyun Kyung [Joon Sun's ex-wife]

  Support Role
• 
  Kim Bo Yeon

  Choi Yoon Jung [Gyu Jin & Jae Suk's mother]

  Support Role
• 
  Lee Sang Yi

  Yoon Jae Suk [Gyu Jin's younger brother]

  Support Role
• 
  Ahn Kil Kang

  Yang Chi Soo [Young Dal's friend]

  Support Role
• 
  Lee Ga Yeon

  Song Seo Young [Joon Sun & Hyun Kyung's eldest daughter]

  Support Role
• 
  Ahn Seo Yeon

  Song Seo Jin [Joon Sun & Hyun Kyung's youngest daughter]

  Support Role
• 
  Moon Woo Jin

  Kim Ji Hun [Ga Hui's son]

  Support Role
• 
  Ki Do Hoon

  Park Hyo Shin

  Support Role
• 
  Kim So Ra

  Lee Joo Ri

  Support Role
• 
  Song Da Eun

  Kim Ga Yeon

  Support Role
• 
  Oh Eui Shik

  O Jeong Bong [Stuntman]

  Support Role
• 
  Jang Won Hyuk

  Lee Jong Soo [Stuntman]

  Support Role
• 
  Alex

  Lee Jung Rok

  Support Role
• 
  Son Sung Yoon

  Yoo Bo Young [Gyu Jin's first love]

  Support Role
• 
  Song Min Jae

  Yoo Shi Hoo [Bo Young's son]

  Support Role
• 
  Shin Soo Jung

  Park Ji Yeon

  Support Role
• 
  Kang You Seok

  Han Gi Yeong [Doctor]

  Support Role
• 
  Kim Hyun Mok

  Hong Sung Woo [Doctor]

  Support Role
• 
  Kim Mi Eun

  Shin Hye Jeong [Doctor]

  Support Role
• 
  Bae Ho Geun

  Im Seung Hyun [Ga Hee's ex-husband]

  Support Role
• 
  Han Bom

  Oh Yeon Jin [Nurse]

  Support Role
• 
  Lee Sang Kyung

  Shim Jeong Hee [Nurse]

  Support Role
• 
  Jo Mi Ryung

  Hong Yeon Hong

  Support Role
• 
  Woo Hyun Seo

  Yeo Jin

  Support Role
• 
  Lee Da Hae

  Hae Yeong

  Support Role
• 
  Kim Nu Rim

  [Lee Joo Ri's brother]

  Support Role
• 
  Shin Mi Young

  [Dried fish shop owner]

  Support Role
• 
  Kim Ga Young

  [Twisted bread stick shop owner]

  Support Role

Guest Role

• 
  Ji Il Joo

  Cha Young Hoon [Da Hee's boyfriend] (Ep. 1-2, 4, 44)

  Guest Role
• 
  Park Sun Young

  [Cho Yeon's guest] (Ep. 11)

  Guest Role
• 
  Lee Gyu Sub

  [Father of Na Hee's patient] (Ep. 11, 37)

  Guest Role
• 
  Lee Sung Kyung

  Ji Sun Kyung [Jae Seok's ex-girlfriend / Model] (Ep. 53)

  Guest Role
• 
  Chani

  Choi Ji Won [Da Hee's classmate] (Ep. 59-66, 68)

  Guest Role
• 
  Jung Ye Nok

  [Da Hee's classmate] (Ep. 57-66, 68)

  Guest Role
• 
  Ri Woo Jin

  Cho Yeon's father / Monk [Young] (Ep. 65)

  Guest Role
• 
  Jo Han Chul

  [Loan shark] (Ep. 60-63, 65-74)

  Guest Role
• 
  Lee Kun Goo

  [Car driver] (Ep. 67-68)

  Guest Role
• 
  Park Geon Rak

  [Detective] (Ep. 76)

  Guest Role
• 
  Lee Pil Mo

  Lee Hyun [Director] (Ep. 94-98)

  Guest Role
• 
  Kim Joo Young

  Song Yi

  Guest Role
• 
  Shin Yeon Suk

  Ji Hyang Soon

  Guest Role
• 
  Lee Kyung Wook

  Jang Ho Beom

  Guest Role
• 
  Kim Hye Won

  Kwon Ji Hye [Store manager]

  Guest Role
• 
  Son Jong Hak

  Jang Chung Soo [Hospital director]

  Guest Role
• 
  Lee Jeong Whee

  [Bar girl]

  Guest Role
• 
  Yu Yeon Seok

  [Doctor]

  Guest Role
• 
  Ahn Seok Hyun

  [Flashback boy]

  Guest Role
• 
  Yong Jin

  [Stall customer]

  Guest Role
• 
  Gu Bon Jin

  [Movie director]

  Guest Role
• 
  Jung Kang Hee

  [Drama director]

  Guest Role
• 
  Lee Seo Hyeon

  Song Da Hee [Young]

  Guest Role
• 
  Jung Han Bit

  Seo Yoon Hee

  Guest Role
• 
  Heo Hyun Ho

  [Monk]

  Guest Role
• 
  Jang Woo Jun

  [Vaccination boy]

  Guest Role
• 
  Kim Li Na

  [Information desk employee]

  Guest Role
• 
  Oh Min Jung

  [Store owner]

  Guest Role
• 
  Noh Jung Hwan Guest Role
• 
  Lee Do Hye Guest Role
• 
  Lim Ha Bi

  Song Young Sook [Child]

  Guest Role
• 
  Kim Joo Eun Guest Role

Bit part

• 
  Jang Young Hyun

  [Jae Suk's friend]

  Bit part

Unknown

• 
  Song Ha Rim Unknown
• 
  Park Do Wook Unknown
• 
  Jung Ji Hwan Unknown
• 
  Nam Jung Hee

  Shim Moon Shil

  Unknown
• 
  Kim Seong In Unknown
• 
  Han Do Yi Unknown
• 
  Hong Seong Gwan Unknown
• 
  Jang Ho Joon Unknown
• 
  Oh Ji Yeon Unknown
• 
  Kim Jin Ok Unknown
• 
  Hwang Ga Hee Unknown
• 
  Kim Da Yun Unknown