Director
Screenwriter & Director
Main Role
- Park Ji Hoon Main Role
- Choi Hyun Wook Main Role
- Hong Kyung Main Role
- Kim Su GyeomJeon Yeong Bin / Oswald YangMain Role
Support Role
- Shin Seung Ho Support Role
- Hwang Sung BinHan Tae HunSupport Role
- Cha Woo MinKang U Yeong [UFC player]Support Role
- Yoon Jung HoonLee Jeong ChanSupport Role
- Na ChulKim Gil SuSupport Role
- Park Jung HoonHung GyuSupport Role
- Yeom Ji Young[Grade 1 Class 6 homeroom teacher]Support Role
- Shin Jun Chul[Korean literature teacher]Support Role
- Gong Hyun Joo[Yeon Si Eun's mother]Support Role
- Kim Sung Kyun[Yeon Si Eun's father]Support Role
- Jo Han ChulO Jin Won [O Beom Seok's father]Support Role
- Oh Dong Min[O Jin Won's aide]Support Role
- Jo Yong Geun[O Jin Won's secretary]Support Role
- Lee Jae Hak[Gang member]Support Role
- Jang Myung Jin[PE teacher]Support Role
- Gong Jun Ho Support Role
Guest Role
- Cha Sung JeSung Chan [Jeon Seok Dae's 'little brother']Guest Role
- Jo Ah Young[Yeong Bin's friend] (Ep. 1)Guest Role
- Shin Ga Ram[Yeong Bin's friend] (Ep. 1)Guest Role
- Lee Hyun Bae[Yeong Bin's friend] (Ep. 1)Guest Role
- Yu Seong Yong[Baseball player] (Ep. 1)Guest Role
- Oh Su Yun[Yeong Bin's mother] (Ep. 2)Guest Role
- Jang Dae WoongKim Won Seok (Ep. 2-3)Guest Role
- Kim Hyuk Jong[Police officer 1] (Ep. 3)Guest Role
- Kang Jun Young[Police officer 2] (Ep. 3)Guest Role
- Kim Tae Joon[Police officer 3] (Ep. 4)Guest Role
- Pyun Hae JoonKim Hui Jun (Ep. 5)Guest Role
- Park Sang Eun[Jeong Chan's friend] (Ep. 5)Guest Role
- Kim Hoe Chang[Bully] (Ep. 5)Guest Role
- Jang Jae HaYeon Si Eun [Child] (Ep. 7)Guest Role
- Yoo Soo BinChoi Hyo Man [Eunjang High School bully] (Ep. 8)Guest Role
- Byun Jung Hee[An Su Ho's grandmother] (Ep. 8)Guest Role
- Kim Hyun[School principal] (Ep. 8)Guest Role
- Lee Hae Woon[Homeroom teacher] (Ep. 8)Guest Role
- Kim Kyung MinLee Hyeon MinGuest Role
- Chun Myung WooCrongGuest Role
- Kang Min Soo[Math teacher]Guest Role
- Jang Tae Hyun[Long haired guy]Guest Role
- Park Jae Hwi[Gang member]Guest Role
- Jin Hui Gyu[Byeoksan high school student]Guest Role
- Seo Dong Gyu[Gang member]Guest Role
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