Director
Screenwriter
Main Role
- Shin Ye EunOk Chan MiMain Role
- LomonJi Soo HeonMain Role
- Seo Ji HoonSeok Jae BeomMain Role
- Chae Sang WooGi Oh SungMain Role
- Lee Soo MinKook Ji HyunMain Role
- Jung Soo BinTae So YeonMain Role
Support Role
- Kim Joo RyoungJin So JungSupport Role
- Jang Hyun SungGi Wang Do [Chief of Police Station]Support Role
- Kang YulPark Won Seok / Ok Chan KyuSupport Role
- Yeon OhIm Seung WooSupport Role
- WooyeonHong A JungSupport Role
- Jin Ho EunSa Jung GyeongSupport Role
- Han Seung BinNam Hak SooSupport Role
- Hwang Bo UnSeo Da YeonSupport Role
- Moon Ye JinPark Na RinSupport Role
- Ok Jin UkMa Nak JoonSupport Role
- Jeong Han SeolKim Seo JoonSupport Role
- Jeon Seok ChanGu Ja Taek [Yongtan High School's Teacher]Support Role
- Han Chul WooJo Duk Hyun [Yongtan High School's Teacher]Support Role
- Yoo Sun HoOh Nam Soo [Yongtan High School's Coach]Support Role
- Kim Jung Ho[Yongtan High School's principal]Support Role
- Kwak Ji Yoo[Yongtan High School's health teacher]Support Role
- Shin Soo HoHyun Jong KookSupport Role
- Park Wan KyuJeon In SeonSupport Role
- Yoon Jin SeongShin Yu KyungSupport Role
- Kim Do YeonAhn Ji WonSupport Role
- Kim Na EunYoon ChaeSupport Role
- Kim Hak SeonPark Yong JaeSupport Role
- Ha MinHwang Soo NaSupport Role
- Park Sun Ah[Seok Jae Bum's mother]Support Role
- Park Jung YeonJo Ah YoungSupport Role
- Yoon Young IlMr. YooonSupport Role
- Ahn Hyun HoMin Seon HaSupport Role
- Jang Yi JungYoon Hee JeongSupport Role
- Choi Na RinYoon JiSupport Role
Guest Role
- Yoon Dong Hwan[Student]Guest Role
- Jung Seo YeonOk Chan Mi [Young] (Ep. 1)Guest Role
- Jang Sun YoolOk Chan Kyu [Young] (Ep. 1)Guest Role
- Jang Yoo[Building landlord] (Ep. 1)Guest Role
- Hong Suk Youn[School security guard] (Ep. 1)Guest Role
- Yeon Bo Ra[Living facility administrator] (Ep. 1)Guest Role
- Lee Kun Goo[Motorcycle thief] (Ep. 1)Guest Role
- Yoo Seung Min[Police officer] (Ep. 1)Guest Role
- Park Gwang JaeKo Duk Joon (Ep. 1, 3)Guest Role
- Son In Yong[Car repair shop boss] (Ep. 1, 3)Guest Role
- Jung Dae Yong[Dormitory manager] (Ep. 1, 4)Guest Role
- Jung Sun ChulYang Il Suk (Ep. 1, 6)Guest Role
- Lee Hyun Seo[Seon Ha's mother] (Ep. 2)Guest Role
- Sung No Jin[Seon Ha's father] (Ep. 2-3)Guest Role
- Choi SeolIm So Mi (Ep. 2-3)Guest Role
- Kim Jun HyungJi Soo Min (Ep. 3)Guest Role
- Jo Yoo Jung[Gi family's housekeeper] (Ep. 3)Guest Role
- Ha Young Jin[Jung Gyeong's father] (Ep. 3)Guest Role
- Kim Seo Kyung[Doctor] (Ep. 3)Guest Role
- Lee Yoo Jung[Police captain] (Ep. 4)Guest Role
- Won Chun Gyu[Detective] (Ep. 4)Guest Role
- Seo Young SamMonk Beobryeon (Ep. 4)Guest Role
- Ok Soo Boon[Bully girl] (Ep. 4)Guest Role
- Kim Il Woo[Building security guard] (Ep. 4)Guest Role
- Kang Yoon[Jung Gyeong's uncle] (Ep. 4, 6)Guest Role
- Yoo Moon Chi[Jung Gyeong's uncle' friend] (Ep. 4, 6)Guest Role
- Lee Da KyungShim Eun Jin (Ep. 5)Guest Role
- Jung Hye Kyung[Cafe owner] (Ep. 5)Guest Role
- Park Jung Eon[Violin teacher] (Ep. 5)Guest Role
- Kim Seon HwaMok Jeong Hyeon [Doctor] (Ep. 5-6)Guest Role
- Kang Yi SukKwon Se Jin (Ep. 5-6)Guest Role
- Seo Hye RinYang Hye Jeong [Ji Hyun's mother] (Ep. 6)Guest Role
- Bong Jae HyunBang Woo Tak (Ep. 7)Guest Role
- Im Ho Joon[Study room owner] (Ep. 8)Guest Role
- Ma Jung Pil[Doctor] (Ep. 8)Guest Role
- Jun Sung HwanCho Do Hyun (Ep. 9)Guest Role
- Jang Jae Kwon[Lawyer] (Ep. 10)Guest Role
- Cha Young Mi[Convenience store cashier] (Ep. 11)Guest Role
- Jo Chang Geun[Basketball playing teen] (Ep. 11)Guest Role
- Kim Young Mi[Music academy director] (Ep. 11)Guest Role
- Byun Gun Woo[Cellphone store clerk] (Ep. 11)Guest Role
- Jo Myung Haeng[Black suit man] (Ep. 11)Guest Role
- Choi Hyun Joon[Black suit man] (Ep. 11)Guest Role
- Chan Jun YeongJu Hyeok GeonGuest Role
- Bae Ji Won[Basketball playing teen] (Ep. 11)Guest Role
- Woo Ji HanChoi Eun HyeokGuest Role
Unknown
- Kwon Do Hyung Unknown
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