School 2021

Director

• 
  Kim Min Tae

Planning Producer

• 
  Kim Sang Hwi

Screenwriter

• 
  Dong Hee Seon
• 
  Jo Ah Ra

Main Role

• 
  Kim Yo Han

  Kong Gi Jun

  Main Role
• 
  Cho Yi Hyun

  Jin Ji Won

  Main Role
• 
  Choo Young Woo

  Jung Yeong Ju

  Main Role
• 
  Hwang Bo Reum Byeol

  Kang Seo Yeong

  Main Role
• 
  Kim Kang Min

  Ji Ho Seong

  Main Role
• 
  Seo Hee Seon

  Ko Eun Bi

  Main Role

Support Role

• 
  Jeon Seok Ho

  Lee Gang Hun [Teacher]

  Support Role
• 
  Kim Gyu Seon

  Song Chae Rin [Teacher]

  Support Role
• 
  Lee Ji Ha

  Koo Mi Hui

  Support Role
• 
  Kim Min Sang

  Lee Han Su [Head of the school affairs department]

  Support Role
• 
  Park Keun Rok

  Sin Cheol Min

  Support Role
• 
  Shin Chul Jin

  O Jang Seok [Principal]

  Support Role
• 
  Go Eun Min

  Kim Yeong Na [Teacher]

  Support Role
• 
  Im Jae Geun

  Yeo Sam Yeol [Teacher]

  Support Role
• 
  Yoon Yi Reh

  Lee Jae Hui [Jae Hyeok's twin sister]

  Support Role
• 
  Lee Sang Jun

  Lee Jae Hyeok [Jae Hui's twin brother]

  Support Role
• 
  Lee Ha Eun

  Jung Min Seo

  Support Role
• 
  Kim Nu Rim

  Jeon Jong Bok

  Support Role
• 
  Kim Jin Gon

  Hong Min Gi

  Support Role
• 
  Park Ga Ryul

  Cho Tae Ri

  Support Role
• 
  Jeong Ye Seo

  Lee Hyo Ju

  Support Role
• 
  Kim Cha Yoon

  Kim Myeong A

  Support Role
• 
  Cha Joo Wan

  Choi Tae Gang [Seo Yeong's suitor]

  Support Role
• 
  Park In Hwan

  Kong Yeong Su [Gi Jun's grandfather]

  Support Role
• 
  Jo Seung Yun

  Jin Deok Gyu [Ji Won's father]

  Support Role
• 
  Kim Soo Jin

  Cho Yong Mi [Ji Won's mother]

  Support Role
• 
  Kim Ye Ji

  Jin Jin Su [Ji Won's sister]

  Support Role
• 
  Jo Ryeon

  Kim Seon Ja [Yeong Ju's mother]

  Support Role
• 
  No Ha Yeon

  Lee A Reum [Gang Hun's daughter]

  Support Role
• 
  Kim Hee Chang

  Koo Byeong Cheol

  Support Role
• 
  Jang Tae Min

  Cho Jae Min [Baro Furniture]

  Support Role
• 
  Seo Jae Woo

  Jung Cheol Ju [Yeong Ju's brother]

  Support Role

Guest Role

• 
  Tae In Ho

  Kim Mu Myeong [Teacher] (Ep. 1)

  Guest Role
• 
  Min Jin Woong

  Jung Min (Ep. 1)

  Guest Role
• 
  Kwon Tae Jin

  [Taekwondo coach] (Ep. 1)

  Guest Role
• 
  Shin Gi Hwan

  [Ji Won's co-worker / Lion Espresso & Burger employee] (Ep. 1-2, 10)

  Guest Role
• 
  Park Ye Rin

  Jin Ji Won [Young] (Ep. 1, 4-5)

  Guest Role
• 
  Hong Joo Hyung

  [Yudal Trading company staff] (Ep. 1, 4, 12)

  Guest Role
• 
  Seon Yul U

  [Yudal Trading company staff] (Ep. 1, 4, 12)

  Guest Role
• 
  Jang Sun Yool

  Kong Gi Jun [Child] (Ep. 1, 4-5, 13)

  Guest Role
• 
  Seo Young Sam

  [Visitor to the apprentice’s offices] (Ep. 2)

  Guest Role
• 
  Kim Sang Il

  [Mi Hui's assistant] (Ep. 2-3)

  Guest Role
• 
  Kim Jung Chul

  Jung Yeong Ju [Young] (Ep. 2, 4, 8)

  Guest Role
• 
  Cha Sung Je

  Cha Gyeong Min [Young] (Ep. 2, 8)

  Guest Role
• 
  Moon Woo Jin

  Kong Gi Jun [Young] (Ep. 2, 8, 11)

  Guest Role
• 
  Jung Shi Yool

  Ji Ho Sung [Child] (Ep. 4)

  Guest Role
• 
  Choi Young In

  [Nun] (Ep. 4, 8, 12)

  Guest Role
• 
  Lee Ji Hoon

  Professor Kim (Ep. 5-6)

  Guest Role
• 
  Kim Oh Bok

  [Carpentry competition MC] (Ep. 6)

  Guest Role
• 
  Park Jin Soo

  Lee Ji A (Ep. 7)

  Guest Role
• 
  Jung Ye Bin

  Kim Seong Sil (Ep. 7)

  Guest Role
• 
  Na Ho Won

  [Bus driver] (Ep. 7)

  Guest Role
• 
  Lee Hye Ra

  [Academy parent] (Ep. 7)

  Guest Role
• 
  Lee Yoon Sang

  [Judge] (Ep. 7)

  Guest Role
• 
  Kim Yong Jin

  Lee Gyu Suk [Attorney] (Ep. 7, 9, 13)

  Guest Role
• 
  Kim Han Sang

  [Sang Rim House Architecture employee] (Ep. 8)

  Guest Role
• 
  Yoo Dam Yeon

  [Gyeong Min's mother] (Ep. 8, 11)

  Guest Role
• 
  Yoo Yong

  [Talent agency interviewer] (Ep. 9)

  Guest Role
• 
  Park Young Bok

  Man Su (Ep. 10)

  Guest Role
• 
  Kim Hwan

  [Lion Espresso & Burger employee] (Ep. 10)

  Guest Role
• 
  Ahn Bok Ja

  [Grandma waiting for grandson] (Ep. 11)

  Guest Role
• 
  Lee Do Hye

  Jung Da Hye (Ep. 12)

  Guest Role
• 
  Yoon Cha Young

  Yoo Mi Gyeong (Ep. 12)

  Guest Role
• 
  Goo Jae Yeon

  [Chae Rin's mother] (Ep. 12)

  Guest Role
• 
  Oh Ki Hwan

  [Upset father] (Ep. 12)

  Guest Role
• 
  Park Jin U

  [Kid jumping on bench] (Ep. 12)

  Guest Role
• 
  Kim Yoon Seol

  [Seo Yeong's friend] (Ep. 12)

  Guest Role
• 
  Kim Bum Suk

  [Attorney] (Ep. 13)

  Guest Role
• 
  Lee Woo Shin

  [Judge] (Ep. 13)

  Guest Role
• 
  Noh Hee Joong

  [Chung Tan Constructions employee] (Ep. 13)

  Guest Role
• 
  Song Chang Gyu

  [Chung Tan Constructions employee] (Ep. 13)

  Guest Role
• 
  Jang Eui Don

  [Chung Tan Constructions employee] (Ep. 13)

  Guest Role
• 
  In Sung Ho

  [Chung Tan Constructions manager] (Ep. 13)

  Guest Role
• 
  Kim Kwang Suk

  [Chung Tan Constructions Internal investigator] (Ep. 13)

  Guest Role
• 
  Park Byung Wook

  Security Guard Park (Ep. 14)

  Guest Role
• 
  Lee Won Jin

  [Police officer] (Ep. 14-15)

  Guest Role
• 
  Seo Kwang Jae

  [Doctor] (Ep. 14, 16)

  Guest Role
• 
  Lee Moon Soo

  Sin Eul Seop [CEO] (Ep. 14, 16)

  Guest Role
• 
  Park Jin Soo

  Ko Byeon Ho [Reporter] (Ep. 15)

  Guest Role
• 
  Shin Hee Chul

  Choi Hyeon Gyu [Reporter] (Ep. 15)

  Guest Role
• 
  Uhm Tae Ok

  [Cheol Min's assistant] (Ep. 15)

  Guest Role
• 
  Shin Hee Gook

  [Eun Bi's assistant] (Ep. 15)

  Guest Role
• 
  Hwang Joo Ho

  [Editor] (Ep. 15)

  Guest Role
• 
  Kim Sa Hun

  [Reporter] (Ep. 15)

  Guest Role
• 
  Lee Kan Hee

  [Gi Jun's mother] (Ep. 16)

  Guest Role
• 
  Ahn Se Min

  [Music Bank MC] (Ep. 16)

  Guest Role
• 
  Yim So Yun

  Yun Sol Bin

  Guest Role

Voice Actor

• 
  Hwang Ji A

  [Announcer]

  Voice Actor