In 1999 houdt een tiener een jongen op school nauwlettend in de gaten namens haar verliefde vriendin. Maar dan raakt ze zelf verwikkeld in een liefdesverhaal.
Ja! de film 20th Century Girl is nu beschikbaar om te kijken op Netflix in Nederland.
| Directing | Bang Woo-ri | Director |
| Visual Effects | Jung Seok-jae | VFX Supervisor |
| Writing | Bang Woo-ri | Writer |
| Camera | Cho Young-jik | Director of Photography |
| Art | 이나겸 | Production Design |
| Crew | Jang Eun-young | Post Production Supervisor |
| Editing | No Byeong-uk | Digital Intermediate |
| Costume & Make-Up | Shin Soo-bin | Costumer |
| Costume & Make-Up | Yoon Na-yeon | Costumer |
| Production | 임승용 | Executive Producer |
| Lighting | Jung Hae-ji | Lighting Director |
| Editing | 양진모 | Editor |
| Costume & Make-Up | An Ji-hyeon | Costume Design |
| Costume & Make-Up | 박예리 | Makeup & Hair |
| Sound | Shon Yong-ik | Production Sound Mixer |
| Sound | Lee Sung-june | Sound Supervisor |
| Visual Effects | Hong Jang-pyo | Special Effects Supervisor |
| Crew | Shin Young-hoon | Martial Arts Choreographer |
| Crew | Yun Seok-jin | Martial Arts Choreographer |
| Production | Kim Yong-eon | Producer |
| Visual Effects | Kim Gwang-wook | VFX Supervisor |
| Camera | Seo Ji-hyeong | Still Photographer |
| Sound | 달파란 | Original Music Composer |
