Director
Executive Producer
Screenwriter
Main Role
- Ong Seong Wu Main Role
- Kim Hyang Gi Main Role
- Shin Seung Ho Main Role
- Kang Ki Young Main Role
Support Role
- Lee Seung MinLee Ki Tae [Jun Woo's classmate]Support Role
- Kim Do WanCho Sang Hoon [Jun Woo's classmate]Support Role
- Moon BinJung Oh Je [Jun Woo's friend]Support Role
- Jung Young JooPark Geum Ja [Hwi Young's mother]Support Role
- Han Sung MinHwang Ro Mi [Soo Bin's classmate]Support Role
- Sung Ki YoonMa Yoon Gi [Hwi Young's father]Support Role
- Kim Sun YoungYoon Song Hee [Soo Bin's mother]Support Role
- Shim Yi YoungLee Yun Woo [Jun Woo's mother]Support Role
- Park Sung GeunLee Guan Yong [Vice Principal]Support Role
- Heo Young JiKim Ji Min [Part-timer]Support Role
- Moon Joo YeonYoon So Ye [Soo Bin's classmate]Support Role
- Kim Ga HeeMoon Chan Yeol [Soo Bin's classmate]Support Role
- Yoo In SooYoo Pil Sang [Jun Woo's classmate]Support Role
- Shin Ki JoonHa Shim BokSupport Role
- Lee Do Hyun[Sang Hoon's father] (Ep.8)Support Role
- Kim Bo YunKwon Da Hin [Soo Bin's classmate]Support Role
- Baek Jae WooGo DongSupport Role
- Lee Hae YoungYu Jong Soo [Soo Bin's father] (Ep.9-10, 12)Support Role
- Choi Ga In[Tutor]Support Role
- Chae Hee Su[Broadcasting staff]Support Role
- Woo Joon SeoPark Gyu NamSupport Role
- Kim So Hee[Broadcasting staff]Support Role
Guest Role
- Choi Jae WoongChoi Myeong Joon [Jun Woo's father] (Ep.2, 13-14)Guest Role
- Lee Shi WooMa Whi Young [Young] (Ep. 9)Guest Role
- Choi Dae HoonSon Je Yeong [Mathematics Teacher] (Ep.1, 4, 6-8)Guest Role
- Song Geon HeeShin Jeong Hu [Jun Woo's best friend] (Ep. 3-4)Guest Role
- Lee Seung IlJoo Hyun JangGuest Role
- Ri Min[Part-timer at a Convenience Store] (Ep. 1, 3, 6-7)Guest Role
- Choi Woo SungLim Gun Hyuk [Byungmun High School] (Ep.3-5)Guest Role
- Kim Kwang Shik[Oh Je's father] (Ep.5-8)Guest Role
- Jung Hyun JoonChoi Joon Woo [Child] (Ep.2-3, 5, 14)Guest Role
- Kim Ji WooShin Jeong Hu [Child] (Ep.3, 5)Guest Role
- Lee Hwa Jung[Soo Bin's Bodyguard] (Ep.13-14)Guest Role
- Kang Hoon[Ma Hwi Young's older brother] (Ep.16)Guest Role
- Son Kyung Won[Ro Mi's father]Guest Role
- Min Jung Sup Guest Role
- Choi Yoo Song Guest Role
- Jeon Hyun Sook Guest Role
- Jeon Jin Seo Guest Role
- Kim Nu Rim[High School student]Guest Role
- Jung Se Hyun[Female student]Guest Role
- Seo Jeong Uk[Student]Guest Role
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