After trying to cover up a car accident that left a man dead, a crooked homicide detective is stalked by a mysterious man claiming to have witnessed the event.
Unfortunately the movie A Hard Day is not yet available on HBO Max.
| Writing | Kwak Jeong-deok | Adaptation |
| Sound | Sung Yoon-yong | Sound Supervisor |
| Crew | Choi Dong-hun | Martial Arts Choreographer |
| Visual Effects | Kim Nam-sik | VFX Supervisor |
| Visual Effects | Junhoi Kim | Visual Effects |
| Writing | Lee Hae-jun | Adaptation |
| Production | Cha Ji-hyun | Producer |
| Production | You Jeong-hun | Executive Producer |
| Production | Lee Dong-yoon | Producer |
| Visual Effects | Jeong Jaehoon | Visual Effects Supervisor |
| Camera | Kim Tae-sung | Director of Photography |
| Sound | Jung Jin-wook | Production Sound Mixer |
| Directing | Kim Seong-hun | Director |
| Writing | Kim Seong-hun | Writer |
| Writing | Jang Hang-jun | Writer |
| Sound | Kim Mi-mi | Boom Operator |
| Camera | Song Gyeong-seop | Still Photographer |
| Production | Jang Won-seok | Executive Producer |
| Costume & Make-Up | Ko Hee-jung | Costume Design |
| Editing | Kim Chang-ju | Editor |
| Costume & Make-Up | Kwon Su-kyung | Makeup & Hair |
| Sound | Mok Young-jin | Original Music Composer |
| Editing | Kim Woo-hyun | Assistant Editor |
| Editing | Han Mi-yeon | Assistant Editor |
| Lighting | Kim Gyeong-seok | Lighting Director |
| Sound | Lee In-gyu | Sound Supervisor |
| Art | Lee Mi-kyoung | Production Design |
