Director
Screenwriter
Main Role
- Ha Seok Jin Main Role
- Park Ha Sun Main Role
Support Role
- Hwang Woo Seul HyeProfessor Hwang Jin YiSupport Role
- Gong MyungJin Gong MyungSupport Role
- KeyKim Gi BeomSupport Role
- Kim Won HaeAcademy Director Kim Won HaeSupport Role
- Jung Chae YeonJung Chae YeonSupport Role
- Min Jin WoongProfessor Min Jin WoongSupport Role
- Kim Dong YoungKim Dong YeongSupport Role
- Lee Yong YiKim Mi KyungSupport Role
- Lee Su Ryeon[Dong Yeong's older sister]Support Role
- Lee Rang Seo[Civil service examination student]Support Role
- Kwon Jae Hee[Jeong Seok and Gong Myeong's mother]Support Role
Guest Role
- Jung Sung Ho[Ji Woong's senior](Ep.15)Guest Role
- Choi Min Ho[Himself] (Ep. 5)Guest Role
- Kim Hee Won[Jeong Seok's old boss]Guest Role
- Ha Yeon SooJoo Yeon [Dong Yeong's girlfriend](Ep.1, 2 & 16)Guest Role
- Jeon So Min[Jeong Seok's blind date] (Ep. 10)Guest Role
- Jo KwonJo Kwon (Ep. 11)Guest Role
- Kim Ji SukLee Jin Sang [Guy at the club](Ep.13)Guest Role
- Jang Woo Hyuk[Guy at the club](Ep.13)Guest Role
- Jang Do Yoon[Graduate from class #1] (Ep. 14)Guest Role
- Lee Se Young[Graduate from class #2] (Ep. 14)Guest Role
- Lee Myung HoonGraduate from class #3 (ep.14)Guest Role
- Ki Hui Hyun[Girl on a group blind date] (Ep. 15)Guest Role
- Ahn Eun Jin[Girl on a group blind date] (Ep. 15)Guest Role
- Jang Do YeonSeo Do Yeon [Korean professor]Guest Role
- Eunice[Uni student]Guest Role
- Park Soo Yeon[Civil service examination student]Guest Role
- Jung Myung Kyun[Male student]Guest Role
- Kim Jung Han[Driver]Guest Role
- Kim Joo Hee Guest Role
- Bae Eun Woo[LP bar customer] (Ep. 6)Guest Role
- Lee So Yul Guest Role
- Park Cho A[Employee]Guest Role
Unknown
- Kim Hyun Mok Unknown
- Joo Eo Jin Unknown
- An Tae Young Unknown
- Shin Soo Hyun Unknown
- Na Do Yool Unknown
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