In mid '90s, 3 female high school-grad office workers take up English classes together to get promotions and they team up to uncover corruption within their company.
| Directing | Lee Jong-pil | Director |
| Production | Park Un-kyoung | Executive Producer |
| Editing | Heo Sun-mi | Editor |
| Lighting | Shin Seung-hoon | Lighting Director |
| Writing | Lee Jong-pil | Adaptation |
| Costume & Make-Up | Yoon Jeong-hee | Costume Design |
| Production | Park Yoon-ho | Producer |
| Camera | Park Se-seung | Director of Photography |
| Costume & Make-Up | Kim Seo-young | Makeup & Hair |
| Writing | Son Mi | Writer |
| Art | Bae Jung-yoon | Production Design |
| Editing | Cho Han-wool | Editor |
| Sound | Choi Tae-young | Sound Supervisor |
| Writing | Hong Soo-young | Writer |
| Sound | Dalpalan | Original Music Composer |
| Production | Ki Won-gyu | Executive Producer |
| Art | Jeon Jae-wook | Props |
| Art | Oh You-jin | Props |
| Directing | Song Dong-kyu | Assistant Director |
| Camera | Ha Jin-kyung | Camera Operator |
| Sound | Shon Yong-ik | Production Sound Mixer |
| Visual Effects | Hong Jang-pyo | Special Effects Supervisor |
| Visual Effects | Park Ui-dong | Visual Effects |
| Editing | Park Jin-ho | Digital Intermediate |
| Art | Song Suk-ki | Set Decoration |
