Composer
Director
Martial Arts Director
Screenwriter
Main Role
- Yoo Seung Ho Main Role
- Jo Bo Ah Main Role
- Kwak Dong Yeon Main Role
Support Role
- Chun Ho Jin Support Role
- Lee Kang MinYoon Sung Woo [Bok Soo’s classmate]Support Role
- Kim Yeo JinIm Se Kyung [Se Ho's mother]Support Role
- Kim Mi KyungLee Jung Sun [Bok Soo's mother]Support Role
- Kim Dong YoungLee Kyung Hyun [Bok Soo’s friend]Support Role
- Park Ah InYang Min Ji [Bok Soo’s friend]Support Role
- Uhm Hyo SubKim Kwi Chang [Principal]Support Role
- Kim Kwang GyuSong Yoo Taek [Vice Principal]Support Role
- Jo Hyun Shik Support Role
- Park Kyung HyeJang Ji Hyun [Ethics Teacher]Support Role
- Yun Joon SukOh Young Min [Bok Soo’s classmate]Support Role
- Yoo Sun HoYoo Shi On [Bok Soo’s classmate]Support Role
- Kim Da YeGye So Ra [Bok Soo’s classmate]Support Role
- Oh Hee JoonKim Jae Yoon [Bok Soo’s classmate]Support Role
- Kim Jae HwaKang So Jung [Bok Soo's older sister]Support Role
- Choi Won HongKang In Ho [So Jung's son, Bok Soo's nephew]Support Role
- Kim Young OkLee Sun Hye [Soo Jung's grandmother]Support Role
- Jang Won YoungKim Guk Hyun [Student's manager]Support Role
- Jang Dong JooLee Chae Min [Ivy Class' student]Support Role
- Kim Do YeonHong Jung Hye [Korean Language Teacher]Support Role
- Kim Young Sun[Young Min's mother]Support Role
- Shin Dam SooKim Myung Ho [Former Administrative manager]Support Role
- Kim KyulDong Hwi [PE Teacher]Support Role
- Jeon Soo KyungKim Da Seon [Chae Min's mother]Support Role
- Hong Seung BumChoi Do Hyun [Bok Soo’s classmate]Support Role
- Wie Ji YeonLee Mi RaSupport Role
- Joel RobertsSimran [Convenience store worker]Support Role
- Lee Seung HyungMr. Yoon [School's secretary]Support Role
- Chae Song AhPark Min Hee [School Nurse]Support Role
- Choi Yu RiKim Ha Yeon [Kim Myung Ho's daughter]Support Role
- Yu Yeon SuPark Hye RaSupport Role
- Baek Ji HoonGyeong Su [Student]Support Role
- Kwon Hyuk[PE Teacher]Support Role
Guest Role
- Lee Chae Young[Herself / Bride] (Ep. 1)Guest Role
- Kim Jin Woo[Himself / Groom] (Ep. 1)Guest Role
- Hwang Bo Ra[Woman dumped by Kang Bok Soo] (Ep. 1)Guest Role
- Kim Ji Min[Rich lady and a Your Request's client] (Ep. 4)Guest Role
- Seo Hye WonKim Bo Kyung (Ep. 8)Guest Role
- Lee Woo JooKang In Ho [Young]Guest Role
- Park Jin Young[Teacher]Guest Role
- Kwon Yoo Na[Student]Guest Role
- Ho Sol Hee[Cute trio]Guest Role
- Kim Mi Hye[Reporter]Guest Role
- Jang Eui Don[Inspector]Guest Role
- Han Chang Heon[School bully]Guest Role
- Bret Allan Lindquist[Store employee]Guest Role
- Lee Ji Wan[High school girl]Guest Role
- Jung Dong Gyu[School's board member]Guest Role
- Jung Myung Joon[Hearing Session member]Guest Role
- Lee Jung Eun[Client's mother who asks for fake boyfriend]Guest Role
- Han Hee Jung Guest Role
- Ha Jin Guest Role
- Kim Hong EunDo So MinGuest Role
- Bae Yu Ra[Japanese language teacher]Guest Role
Unknown
- Oh Kyung Hwa Unknown
- Seo Chae Mi Unknown
- Im Yu Ran Unknown
- Han Sang Gil Unknown
- Kim Seung Jun Unknown
- Lee Myung Joon Unknown
- Shin Yeon Mi Unknown
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