In 1999, a teen girl keeps close tabs on a boy in school on behalf of her deeply smitten best friend – then she gets swept up in a love story of her own.
Unfortunately the movie 20th Century Girl is not yet available on HBO Max.
| Directing | Bang Woo-ri | Director |
| Visual Effects | Jung Seok-jae | VFX Supervisor |
| Camera | Cho Young-jik | Director of Photography |
| Art | Lee Na-gyeom | Production Design |
| Writing | Bang Woo-ri | Writer |
| Crew | Jang Eun-young | Post Production Supervisor |
| Editing | No Byeong-uk | Digital Intermediate |
| Visual Effects | Kim Gwang-wook | VFX Supervisor |
| Crew | Yun Seok-jin | Martial Arts Choreographer |
| Editing | Yang Jin-mo | Editor |
| Production | Kim Yong-eon | Producer |
| Camera | Seo Ji-hyeong | Still Photographer |
| Costume & Make-Up | An Ji-hyeon | Costume Design |
| Visual Effects | Hong Jang-pyo | Special Effects Supervisor |
| Costume & Make-Up | Park Yea-ri | Makeup & Hair |
| Crew | Shin Young-hoon | Martial Arts Choreographer |
| Sound | Shon Yong-ik | Production Sound Mixer |
| Costume & Make-Up | Shin Soo-bin | Costumer |
| Costume & Make-Up | Yoon Na-yeon | Costumer |
| Production | Syd Lim | Executive Producer |
| Sound | Lee Sung-june | Sound Supervisor |
| Lighting | Jung Hae-ji | Lighting Director |
| Sound | Dalpalan | Original Music Composer |
