Director
Screenwriter
Main Role
- Kim Yo HanKong Ki JoonMain Role
- Choo Young WooJung Young JooMain Role
- Cho Yi HyunJin Ji WonMain Role
- Hwang Bo Reum ByeolKang Seo YoungMain Role
- Kim Kang MinJi Ho SungMain Role
- Seo Hee SeonKo Eun BiMain Role
Support Role
- Jun Suk HoLee Kang Hoon [Teacher]Support Role
- Kim Gyu SeonSong Chae Rin [Teacher]Support Role
- Lee Ji Ha Support Role
- Kim Min SangLee Han Soo [Head of the school affairs department]Support Role
- Park Keun RokShin Chul MinSupport Role
- Shin Chul JinOh Jang Seok [Principal]Support Role
- Go Eun MinKim Young Na [Teacher]Support Role
- Im Jae GeunYeo Sam Yeol [Teacher]Support Role
- Yoon Yi RehLee Jae Hee [Jae Hyuk's twin]Support Role
- Lee Sang JunLee Jae Hyuk [Jae Hee's twin]Support Role
- Lee Ha EunJung Min SeoSupport Role
- Kim Nu RimJeon Jong BokSupport Role
- Kim Jin GonHong Min KiSupport Role
- Park Ga RyulJo Tae RiSupport Role
- Jeong Ye SeoLee Hyo JooSupport Role
- Kim Cha YoonKim Myung ASupport Role
- Cha Joo WanChoi Tae Kang [Seo Young's suitor]Support Role
- Park In HwanKong Young Soo [Ki Joon's grandfather]Support Role
- Jo Seung YunJin Deok Kyu [Ji Won's father]Support Role
- Kim Soo JinJo Yong Mi [Ji Won's mother]Support Role
- Kim Ye JiJin Jin Soo [Ji Won's sister]Support Role
- Jo RyeonKim Sun Ja [Young Joo's mother]Support Role
- Noh Ha YeonLee Ah Reum [Kang Hoon's daughter]Support Role
- Kim Hee ChangKoo Byung ChulSupport Role
- Jang Tae MinJo Jae Min [Baro Furniture]Support Role
- Seo Jae WooChul Joo Jeong [Young Joo's Brother]Support Role
Guest Role
- Tae In HoKim Moo Myung [Teacher] (Ep. 1)Guest Role
- Kwon Tae Jin[Taekwondo coach] (Ep. 1)Guest Role
- Min Jin WoongJung Min (Ep. 1)Guest Role
- Shin Gi Hwan[Ji Won's co-worker / Lion Espresso & Burger employee] (Ep. 1-2, 10)Guest Role
- Park Ye RinJin Ji Won [Young] (Ep. 1, 4-5)Guest Role
- Hong Joo Hyung[Yudal Trading company staff] (Ep. 1, 4, 12)Guest Role
- Seon Yool Woo[Yudal Trading company staff] (Ep. 1, 4, 12)Guest Role
- Jang Sun YoolKong Ki Joon [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 Hee's assistant] (Ep. 2-3)Guest Role
- Kim Jung ChulJung Young Joo [Young] (Ep. 2, 4, 8)Guest Role
- Cha Sung JeCha Kyung Min [Young] (Ep. 2, 8)Guest Role
- Moon Woo JinKong Ki Joon [Young] (Ep. 2, 8, 11)Guest Role
- Jung Shi YoolJi Ho Sung [Child] (Ep. 4)Guest Role
- Choi Young In[Nun] (Ep. 4, 8, 12)Guest Role
- Lee Ji HoonKim [Professor] (Ep. 5-6)Guest Role
- Kim Oh Bok[Carpentry competition MC] (Ep. 6)Guest Role
- Park Jin SooLee Ji Ah (Ep. 7)Guest Role
- Jung Ye BinKim Sung Shil (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 JinLee Gyu Suk [Attorney] (Ep. 7, 9, 13)Guest Role
- Kim Han Sang[Sang Rim House Architecture Employee] (Ep. 8)Guest Role
- Yoo Dam Yeon[Kyung Min's mother] (Ep. 8, 11)Guest Role
- Yoo Yong[Talent agency interviewer] (Ep. 9)Guest Role
- Park Young BokMan Soo (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 HyeJung Da Hye (Ep. 12)Guest Role
- Yoon Cha YoungYoo Mi Kyoung (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 Woo[Kid jumping on bench] (Ep. 12)Guest Role
- Kim Yoon Seol[Seo Young'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 WookSecurity guard Park (Ep. 14)Guest Role
- Lee Won Jin[Policeman] (Ep. 14-15)Guest Role
- Seo Kwang Jae[Doctor] (Ep. 14, 16)Guest Role
- Lee Moon SooShin Eul Seop [CEO] (Ep. 14, 16)Guest Role
- Park Jin SooKo Byun Ho [Reporter] (Ep. 15)Guest Role
- Shin Hee ChulChoi Hyun 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[Ki Joon's mother] (Ep. 16)Guest Role
- Ahn Se Min[Music Bank MC] (Ep. 16)Guest Role
- Yim So YunYoon Sol BinGuest Role
- Hwang Ji A[Announcer voice]Guest Role
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