Lost

Director

• 
  Hur Jin Ho
• 
  Park Hong Soo

Screenwriter

• 
  Kim Ji Hye

Main Role

• 
  Jeon Do Yeon

  Lee Boo Jung

  Main Role
• 
  Ryu Jun Yeol

  Lee Kang Jae

  Main Role
• 
  Park Byung Eun

  Jin Jung Soo

  Main Role
• 
  Kim Hyo Jin

  Lee Kyung Eun

  Main Role

Support Role

• 
  Park Ji Young

  Jung Ah Ran

  Support Role
• 
  Park In Hwan

  Lee Chang Sook

  Support Role
• 
  Shin Shin Ae

  Bong Min Ja

  Support Role
• 
  Yang Dong Geun

  Woo Nam

  Support Role
• 
  Jo Eun Ji

  Lee Soon Kyu

  Support Role
• 
  Yoo Soo Bin

  Lee Sun Joo / "Ttak Yi"

  Support Role
• 
  Son Na Eun

  Kang Min Jung

  Support Role
• 
  Kang Ji Eun

  Mi Seon

  Support Role
• 
  Lee Seo Hwan

  Jang Kyu

  Support Role
• 
  Kang Hyung Suk

  Seo Jun Hyuk

  Support Role
• 
  Oh Gwang Rok

  Seo Jin Seop

  Support Role
• 
  Lee Se Na

  Ji Na

  Support Role
• 
  Ryoo Ji Hoon

  Seo Jong Hoon

  Support Role
• 
  Yoon Soo Hyuk

  Writer Heo

  Support Role

Guest Role

• 
  Cha Yeong Ok

  [Grand Palace resident] (Ep. 1)

  Guest Role
• 
  Seo Suk Gyu

  [Grand Palace receptionist] (Ep. 1)

  Guest Role
• 
  Oh Hye Won

  [Client] (Ep. 1)

  Guest Role
• 
  Na Hyun Woo

  Jung Jeong U [Akira host club] (Ep. 1-2, 6)

  Guest Role
• 
  Kang Hak Soo

  [Grand Palace security guard] (Ep. 1, 12)

  Guest Role
• 
  Park Jung Eon

  Jo Min Ji (Ep. 1, 15)

  Guest Role
• 
  Woo Sang Jun

  [Customer] (Ep. 1, 16)

  Guest Role
• 
  Cha Soon Bae

  [Detective] (Ep. 2)

  Guest Role
• 
  Park Hye Young

  [Alumna] (Ep. 2, 11)

  Guest Role
• 
  Jung Yun Ha

  Jin Ah [Boo Jung's colleague] (Ep. 2, 9, 12, 16)

  Guest Role
• 
  Seon Yul U

  [Waiter] (Ep. 3, 10)

  Guest Role
• 
  Lee Hyo Je

  Lee Kang Jae [Young] (Ep. 3, 11-13)

  Guest Role
• 
  Jung Chung Gu

  [Kang Jae's father] (Ep. 3, 14-15)

  Guest Role
• 
  Je Seung Hyun

  Lee Ji Hyun (Ep. 4-5)

  Guest Role
• 
  Jung Ae Hwa

  Julie (Ep. 4, 7, 12)

  Guest Role
• 
  Lee Ji Hye

  Bae Da Som (Ep. 4, 13)

  Guest Role
• 
  Hwang Jung Yoon

  [Nurse] (Ep. 5)

  Guest Role
• 
  Kim Su Ol

  [Filming set staff] (Ep. 5, 8)

  Guest Role
• 
  Lee Ho Yeol

  [Director] (Ep. 5, 8-9)

  Guest Role
• 
  Lee Eon Jeong

  Kang Ji Yeon (Ep. 9)

  Guest Role
• 
  Choi Hee Jin

  [OB-GYN] (Ep. 9)

  Guest Role
• 
  Jang Jae Ha

  Nam Min Soo (Ep. 9, 14)

  Guest Role
• 
  Lee Ga Kyung

  Nam Hee Sun (Ep. 9, 14)

  Guest Role
• 
  Ho Sol Hee

  Kim [Nurse] (Ep. 9)

  Guest Role
• 
  Kim Han Sang

  [Hired driver] (Ep. 11)

  Guest Role
• 
  Hong Ye Ji

  [Camper] (Ep. 11-12)

  Guest Role
• 
  Kim Hye Jung

  [Min Ja's friend] (Ep. 12)

  Guest Role
• 
  Kim Chu Wol

  [Min Ja's friend] (Ep. 12)

  Guest Role
• 
  Jung Ah Mi

  [Kyung Eun's mother] (Ep. 13)

  Guest Role
• 
  Uhm Tae Ok

  [Fruit vendor] (Ep. 13)

  Guest Role
• 
  Lee Jae Woo

  [Mi Hye's boss] (Ep. 13)

  Guest Role
• 
  Seo Myung Chan

  [Mi Hye's father] (Ep. 14)

  Guest Role
• 
  Kim Si On

  Lee Boo Jung [Young] (Ep. 15)

  Guest Role
• 
  Seol Chang Hee

  Lee Chang Sook [Young] (Ep. 15)

  Guest Role
• 
  Lee Yeon Joo

  [Bookstore employee] (Ep. 6)

  Guest Role
• 
  Hwang Sun Jung

  [filming set staff] (ep.12)

  Guest Role
• 
  Yoo Ah Reum

  [Boyfriend's wife] (Ep. 1)

  Guest Role
• 
  Kim Do Won

  [Soccer boy] (Ep. 10)

  Guest Role
• 
  Jeon Se Yong

  [Doctor]

  Guest Role
• 
  Shin Jae Won

  [Soccer boy] (Ep. 10)

  Guest Role
• 
  Kang Choon Sung

  [Filming set staff] (Ep. 12)

  Guest Role
• 
  Jang Woo Yeon

  Caregiver (Ep. 13)

  Guest Role
• 
  Jo Jin Kyul

  Oh Hyun Ho [Police officer] (Ep. 10-11)

  Guest Role
• 
  Kang Jong Sung

  [Ji Yeon's guardian] (Ep. 3)

  Guest Role
• 
  Ahn Je Na

  [Idol trainee] (ep. 15)

  Guest Role
• 
  Kim Geun Yeong

  [Min Ja's friend]

  Guest Role
• 
  Kim So Min

  [neighboor kid]

  Guest Role
• 
  Son Dong Soo

  [Kyung Eun's husband]

  Guest Role
• 
  Park Si Hyun

  [Jung Woo's sister] (Ep. 3, 16)

  Guest Role
• 
  Kim Min Ki

  [Alumnus] (Ep. 2, 11)

  Guest Role

Unknown

• 
  Seo Sang Won Unknown