A man's daughter is the victim of a brutal hit-and-run car accident. The only witness is the man's dementia-ridden old mother who barely remember any details. The two must work together to find the culprit.
Unfortunately the movie Oh! My Gran is not yet available on HBO Max.
| Costume & Make-Up | Kwak Tae-yong | Special Effects Makeup Artist |
| Sound | Lee Seung-chul | Sound Supervisor |
| Lighting | Lee Je-woo | Lighting Director |
| Sound | Park Seong-ho | Production Sound Mixer |
| Camera | Yang Hyeon-seok | Camera Operator |
| Production | Lee Jae-deok | Line Producer |
| Visual Effects | Yang Il-seok | VFX Supervisor |
| Visual Effects | Park Si-hwan | CGI Director |
| Visual Effects | Min Jun-ho | VFX Supervisor |
| Sound | Song Seung-hyun | Boom Operator |
| Camera | Lee Joong-wan | Key Grip |
| Camera | Chae Jeong-seok | "B" Camera Operator |
| Writing | Lee Na-ra | Adaptation |
| Directing | Jung Se-kyo | Director |
| Production | Kim Han-min | Executive Producer |
| Production | Ok Gwang-hee | Producer |
| Editing | An Hyeon-geon | Editor |
| Sound | Jung Ji-hoon | Original Music Composer |
| Art | Lee Jae-sung | Production Design |
| Writing | Kim Soo-jin | Writer |
| Costume & Make-Up | Jin Min-kyoung | Makeup & Hair |
| Writing | Kim Han-min | Adaptation |
| Writing | Jung Se-kyo | Adaptation |
| Costume & Make-Up | Hong Su-hee | Costume Design |
| Costume & Make-Up | Seo Eun-kyung | Costume Design |
| Camera | Jo Yeong-sang | Director of Photography |
| Art | Kim Nam-ho | Set Decoration |
| Sound | Han Myung-hwan | Sound Mixer |
| Visual Effects | Park Choul-yong | Special Effects Supervisor |
| Directing | Han Gyeong-hoon | Assistant Director |
| Art | Heo Se-min | Props |
