Composer
Director
Screenwriter
Main Role
- Park Se Wan Main Role
- Jang Dong Yoon Main Role
Support Role
- Lee Joo YoungPark Hye JinSupport Role
- Joo Hae Eun Support Role
- Shin Do HyunLee Ye JiSupport Role
- Lee You MiKim Do YeonSupport Role
- Kim Soo Hyun Support Role
- Kim Gab SooLee Kyu Ho [Teacher]Support Role
- Kim Sun YoungPark Mi Young [Shi Eun's mother]Support Role
- Jang Hyun SungKwon Dong Seok [Seong Chan's father]Support Role
- Jang Sung BumHan Dong Hee [English teacher]Support Role
- Song Ji InKim Shi Ra [Shi Eun's sister]Support Role
- Hong Seung HeeKim Joo Hyun [First grader]Support Role
- Jang Yi JungMin TooSupport Role
- Jang Yi JungMin JooSupport Role
- Moon Ho Jin[Dean of students]Support Role
Guest Role
- Yeon Je HyungLee Tae Sun [Movie student] (Ep.1, 4, 13)Guest Role
- Park Soo Young[Vice Principal] (Ep.1, 6-9, 11)Guest Role
- Moon Sook[Hye Jin's grandmother] (Ep. 8, 10)Guest Role
- Lee Do Yeon[Woman at the police station] (Ep. 4)Guest Role
- Kwon Hyuk Bum[Man beaten by Hye Jin] (Ep.4)Guest Role
- Son Sung ChanKim Sang Chul [Shi Eun's father] (Ep.10, 12)Guest Role
- Kang Hye Kyung[Psychiatrist] (Ep. 12)Guest Role
- Son Woo Hyun Guest Role
- Lee Chung Mi Guest Role
- Lee Sang Min Guest Role
- Ra Lee Hye Jin[Archer]Guest Role
- Kim Young Ah Guest Role
- Kim Mi Hye[News Anchor]Guest Role
- Kim Si EunKim Shi Eun [Child]Guest Role
- Moon Hye In[Dance team leader]Guest Role
- Kim Hae Woong Guest Role
- Shin Ji Yeon[Flight Attendant]Guest Role
- Kim In Kyung[Dance sports club member 2]Guest Role
- Kwon Chan Min[Dockyard employee]Guest Role
- Lee Moo Nyoung[Co-worker]Guest Role
Unknown
- Son Dong Hwa Unknown
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