Let Me Be Your Knight

Director

• 
  Ahn Ji Sook

Screenwriter

• 
  Shin Seo Ha
• 
  Hae Yeon
• 
  Seo Jung Eun
• 
  Yoo So Won

Main Role

• 
  Jung In Sun

  In Yun Ju | Kang Seon Ju

  Main Role
• 
  Lee Jun Young

  Yun Tae In

  Main Role

Support Role

• 
  Jang Dong Joo

  Seo U Yeon [Luna's guitarist]

  Support Role
• 
  Kim Jong Hyeon

  Lee Sin [Luna's bassist]

  Support Role
• 
  Yoon Ji Sung

  Kim Yu Chan [Luna's drummer]

  Support Role
• 
  Kim Dong Hyun

  Woo Ga On [Luna's keyboardist]

  Support Role
• 
  Seo Hye Won

  Jung Ba Reun

  Support Role
• 
  Ha Young

  Chae Ji Yeon

  Support Role
• 
  Kwak Ja Hyung

  Daniel Moon / Moon Pil Sun [MM Entertainment CEO]

  Support Role
• 
  Choi Hwan Yi

  Kil Sun Nam [Luna's manager]

  Support Role
• 
  Park Ji Won

  Hyo Bin

  Support Role
• 
  Park So Eun

  Hong Jae Eun

  Support Role
• 
  Lee Sae Chang

  Jang Cheon Sik [Jang Entertainment CEO]

  Support Role

Guest Role

• 
  Jo Jae Ryong

  Nam Jin Sang [Yun Jo's boss] (Ep. 1)

  Guest Role
• 
  Lee Ja Ryoung

  [Doctor] (Ep. 1)

  Guest Role
• 
  Lee Kwang Ik

  [Man on bridge] (Ep. 1)

  Guest Role
• 
  Kim Ik Tae

  Hong Seok (Ep. 1, 4)

  Guest Role
• 
  Park Hye Jin

  Myeong Ja (Ep. 1, 4)

  Guest Role
• 
  Kim Mi Ra

  [Yun Ju's mother] (Ep. 1, 11)

  Guest Role
• 
  Yeo Sang Mok

  [Yun Ju's father] (Ep. 1, 11)

  Guest Role
• 
  Jeong Yeon Kyung

  [Homeowner] (Ep. 1, 11)

  Guest Role
• 
  Kang Min Tae

  Kwak Du Pal [Loan shark] (Ep. 1, 2, 10-11)

  Guest Role
• 
  Park Gwang Jae

  Park [Loan shark] (Ep. 1, 2, 10-11)

  Guest Role
• 
  Seo Yi Soo

  In Yun Jo | In Seon Ju [Child] (Ep. 1, 9, 11)

  Guest Role
• 
  Lee Yong Yi

  Cho Rong (Ep. 1, 7, 11-12)

  Guest Role
• 
  Ok Il Jae

  [Hotel staff] (Ep. 2)

  Guest Role
• 
  Shin Jun Chul

  Gi Un Chan [Psychiatrist] (Ep. 2, 5)

  Guest Role
• 
  Kim Se Dong

  [Used bookstore owner] (Ep. 2, 9)

  Guest Role
• 
  Ok Joo Ri

  [Hiker] (Ep. 3)

  Guest Role
• 
  Lee Jae Eun

  [Hiker] (Ep. 3)

  Guest Role
• 
  Baek So Hyun

  [High school student (Ep. 3)

  Guest Role
• 
  Lee Jae Yoon

  [Judo instructor] (Ep. 3, 6)

  Guest Role
• 
  Song Young Kyu

  Yun Ji Han [Tae In's father] (Ep. 3, 12)

  Guest Role
• 
  Ju A

  Kim Yeon Jeong [DMB Live Studio staff] (Ep. 3, 6, 9-10)

  Guest Role
• 
  Byun Yoon Jeong

  [Yu Chan's mother] (Ep. 3, 8, 10, 12)

  Guest Role
• 
  Kim Ji Hoon

  Yun Tae In [Child] (Ep. 4)

  Guest Role
• 
  Lee Do Ha

  J [High End member] (Ep. 4)

  Guest Role
• 
  Kim Kyung Ho

  No Sang Hun [Bluemoon member] (Ep. 4-6)

  Guest Role
• 
  Hong Seong Jun

  [Bluemoon member] (Ep. 4-6)

  Guest Role
• 
  Kim Shi Hoon

  [Bluemoon member] (Ep. 4-6)

  Guest Role
• 
  Luven

  [Bluemoon member] (Ep. 4-6)

  Guest Role
• 
  Jin Yea

  Min [Reporter] (Ep. 4, 6, 9, 11)

  Guest Role
• 
  Seo Young Sam

  [Doctor] (Ep. 5)

  Guest Role
• 
  Cha Ye Jun

  [U Yeon's friend] (Ep. 5, 8)

  Guest Role
• 
  Eom Ok Ran

  [Ga On's mother] (Ep. 6)

  Guest Role
• 
  Park Jin Soo

  [Video guy] (Ep. 6)

  Guest Role
• 
  Louis

  [Bully] (Ep. 6)

  Guest Role
• 
  Park Eun Young

  [Restaurant owner] (Ep. 7)

  Guest Role
• 
  Oh Jin Seok

  [Photographer] (Ep. 7)

  Guest Role
• 
  Kim Su Ol

  [Photographer's assistant] (Ep. 7)

  Guest Role
• 
  Kang Ji Young

  Nina [Singer/ Songwriter] (Ep. 8-9)

  Guest Role
• 
  Kim Han Gyul

  Jimmy / Seo Hyeon U (Ep. 8-11)

  Guest Role
• 
  Yoon Hyun

  [DMB Live Studio staff] (Ep. 9-10)

  Guest Role
• 
  Kim Tae Yoo

  [Reporter] (Ep. 9-10)

  Guest Role
• 
  Moon Hyeon Jeong

  [Convenience store owner] (Ep. 9, 11)

  Guest Role
• 
  Park Seung Tae

  [Convenience store owner's mom] (Ep. 11)

  Guest Role
• 
  Sim So Yeon

  [Nurse] (Ep. 11)

  Guest Role
• 
  Goo Shi Yeon

  Kim Min Ja [Jimmy's mother] (Ep. 11)

  Guest Role
• 
  Jang Jae Kwon

  [Doctor] (Ep. 12)

  Guest Role
• 
  Cho Eun Seo

  [Girl who catches a falling Ga On] (Ep. 12)

  Guest Role

Unknown

• 
  Kim Sae Rom Unknown