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 |
| Camera | Cho Young-jik | Director of Photography |
| Writing | Bang Woo-ri | Writer |
| Art | 이나겸 | Production Design |
| Crew | Jang Eun-young | Post Production Supervisor |
| Editing | No Byeong-uk | Digital Intermediate |
| Lighting | Jung Hae-ji | Lighting Director |
| Visual Effects | Hong Jang-pyo | Special Effects Supervisor |
| Costume & Make-Up | Shin Soo-bin | Costumer |
| Production | Kim Yong-eon | Producer |
| Production | 임승용 | Executive Producer |
| Costume & Make-Up | 박예리 | Makeup & Hair |
| Crew | Yun Seok-jin | Martial Arts Choreographer |
| Costume & Make-Up | Yoon Na-yeon | Costumer |
| Sound | Shon Yong-ik | Production Sound Mixer |
| Editing | 양진모 | Editor |
| Sound | Lee Sung-june | Sound Supervisor |
| Costume & Make-Up | An Ji-hyeon | Costume Design |
| Visual Effects | Kim Gwang-wook | VFX Supervisor |
| Crew | Shin Young-hoon | Martial Arts Choreographer |
| Camera | Seo Ji-hyeong | Still Photographer |
| Sound | 달파란 | Original Music Composer |
