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유해진 as Gui-bo |
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김민재 as Sung-woong |
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이성경 as Ga-young |
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성동일 as Sung-soo |
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진경 as Mi-ra |
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나문희 as Gui-bo's Mother |
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황우슬혜 as Do-na |
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박규영 as So-young |
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Lee Han-seo as Ji-young |
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김태훈 as Seung-hyuk |
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현봉식 as Coach |
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김강현 as |
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고수희 as |
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최유화 as Hye-jung |
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이지하 as |
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명석근 as |
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Lee Ye-won as Ga-young (young) |
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김태윤 as Gym member |
| Visual Effects | Cho Yong-seok | VFX Supervisor |
| Visual Effects | Yoon Choong-yeol | VFX Supervisor |
| Visual Effects | Jang Min-jae | VFX Supervisor |
| Visual Effects | Chang Ick-jea | VFX Supervisor |
| Editing | Kim Man-geun | Assistant Editor |
| Sound | Jung Jin-wook | Production Sound Mixer |
| Sound | Yang Hye-jin | Sound Editor |
| Visual Effects | Ryu Jae-hwan | VFX Supervisor |
| Writing | Kim Dae-woong | Writer |
| Directing | Kim Dae-woong | Director |
| Art | 김학현 | Set Decoration |
| Production | 배선혜 | Line Producer |
| Production | 이안나 | Producer |
| Production | Park Hyun-tae | Executive Producer |
| Production | Cha Won-chun | Executive Producer |
| Sound | 달파란 | Original Music Composer |
| Camera | 이형덕 | Director of Photography |
| Editing | Moon Se-kyoung | Editor |
| Sound | Gang Hye-yeong | Sound Designer |
| Art | Lee Yo-han | Production Design |
| Camera | Lee Hyung-bin | Camera Operator |
| Costume & Make-Up | Kim Hyun-joo | Costume Designer |
| Lighting | Park Cheong-woo | Lighting Director |
| Editing | Ha Mi-ra | Assistant Editor |
| Crew | 이건문 | Fight Choreographer |
| Costume & Make-Up | 양진선 | Costume Design |
| Costume & Make-Up | Lee Myeung-eun | Makeup & Hair |
| Editing | 류연 | Digital Intermediate Producer |
| Directing | Han Gyeong-hoon | Assistant Director |
