High Cookie

Director

• 
  Song Min Yeop

Screenwriter

• 
  Kang Han

Main Role

• 
  Nam Ji Hyun

  Choi Soo Young

  Main Role
• 
  Choi Hyun Wook

  Seo Ho Su

  Main Role
• 
  Kim Mu Yeol

  Yoo Sung Pil

  Main Role

Support Role

• 
  Jung Da Bin

  Choi Min Young [Soo Young's sister]

  Support Role
• 
  Seo Bum June

  Song Jin Woo ["Prince" of Junghan High School]

  Support Role
• 
  Chae Seo Eun

  Park Hee Jin

  Support Role
• 
  Kim Min

  Kwak Min Joon

  Support Role
• 
  Song Chae Hyun

  Park Yoo Bin [Ho Su's seatmate]

  Support Role
• 
  Choi Ji Su

  Park Ji Hye

  Support Role
• 
  Jung Jae Sung

  Park Sang Gil [Ji Hye's father]

  Support Role
• 
  Song Si An

  Seo Yoo Jeong

  Support Role
• 
  Kwon Ji Woo

  Kwon Ji Woo

  Support Role
• 
  Jung Hee Tae

  Ryu Jin Cheol

  Support Role

Guest Role

• 
  Yoon Je Moon

  Heo Do Hoon

  Guest Role
• 
  Jang Young Nam

  Jo Won Joo

  Guest Role
• 
  Yoon Dong Hwan

  Kim Min Goo

  Guest Role
• 
  Seo Sung Jong

  Park Jae Hyun

  Guest Role
• 
  Park Sung Il

  Moon Kyu Nam

  Guest Role
• 
  Ahn Sang Eun

  Jung Seung Joo

  Guest Role
• 
  Heo Jung Do

  Kim Yun Beom

  Guest Role
• 
  Kim Kyung Min

  Hwang Jae Min

  Guest Role
• 
  Park Seung A

  Lee Seung A

  Guest Role
• 
  Bang So Min

  Oh Da Hyun

  Guest Role
• 
  Lee Hye Ra

  [Sang Gil's wife]

  Guest Role
• 
  Baek In Kwon

  [Mr. Heo's subordinate]

  Guest Role
• 
  Nam Myeong Ryeol

  [Chairman]

  Guest Role
• 
  Park Sang Hwi

  [Jeonghan High School teacher]

  Guest Role
• 
  Kim Jung

  [Jeonghan High School teacher]

  Guest Role
• 
  Kim Hyun Chang

  [Detective] (Ep. 3)

  Guest Role
• 
  Gu Bon Jin

  Kim Jung Woo (Ep. 5)

  Guest Role
• 
  Jo Hyun Im

  [Min Young's caregiver] (Ep. 9, 13)

  Guest Role
• 
  Park Hui Eun

  Oh Jung Sook (Ep. 11-12)

  Guest Role
• 
  Eom Ok Ran

  [Jung Sook's caregiver] (Ep. 11-12)

  Guest Role
• 
  Moon Yong Il

  Detective Yoon (Ep. 13)

  Guest Role
• 
  Jang Eui Don

  Lee Jung Seok (Ep. 14)

  Guest Role
• 
  Kim Ho

  [Taxi driver] (Ep. 16)

  Guest Role
• 
  Ma Jung Pil

  [Doctor] (Ep. 16-17)

  Guest Role
• 
  Choi Yo Woon

  [Restaurant owner] (Ep. 17)

  Guest Role
• 
  Ryoo Sung Ryul

  [Rehabilitation therapist] (Ep. 17)

  Guest Role
• 
  Bae Seong Il

  [Detective] (Ep. 20)

  Guest Role
• 
  Lee Ji Su

  [Police officer] (Ep. 20)

  Guest Role
• 
  Park Yoon Seok Guest Role
• 
  Kim Dong Hwi

  Kang Yong Hwi

  Guest Role
• 
  Hwang Ji A Guest Role

Unknown

• 
  Kim Eun Soo

  Min Yong Gi [Student]

  Unknown