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Kang Ha-neul as Young-ho |
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천우희 as So-hee |
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강소라 as Soo-jin |
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이설 as So-yeon |
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임주환 as Young-hwan |
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Lee Hang-na as Mother |
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이양희 as Father |
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박세현 as Student |
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이예환 as Cram School Student |
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김성균 as Teacher |
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고건한 as Jong-guk |
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남현우 as Student |
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김민서 as Student |
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강영석 as Book Worm |
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최명빈 as Young So-hee |
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Won Ji-u as Young So-yeon |
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고우림 as Young Young-ho |
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이태영 as Teaching Assistant |
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우정원 as Teacher |
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류혜린 as Teaching Assistant |
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강영구 as Mid-age |
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박세현 as High school girl |
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홍하나임 as High school girl |
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김태순 as Front row |
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강이안 as Student |
| Writing | Yu Seong-hyeob | Writer |
| Camera | 유일승 | Director of Photography |
| Lighting | 유석문 | Lighting Director |
| Art | 진훈 | Props |
| Production | Hwang Keun-ha | Executive Producer |
| Art | 김현옥 | Production Design |
| Production | Lee Jin-sung | Producer |
| Art | Yeom Jin | Art Direction |
| Editing | 김상범 | Editor |
| Costume & Make-Up | 김정원 | Costume Design |
| Costume & Make-Up | 이서진 | Makeup & Hair |
| Sound | 김준석 | Music |
| Sound | 공태원 | Sound |
| Visual Effects | 김대준 | VFX Supervisor |
| Visual Effects | 윤대원 | Special Effects Supervisor |
| Sound | 손용익 | Production Sound Mixer |
| Visual Effects | 김정민 | VFX Supervisor |
| Visual Effects | 한재호 | Visual Effects |
| Camera | 박범준 | Key Grip |
| Directing | Cho Jin-mo | Director |
| Art | 이석재 | Props |
| Editing | 김호빈 | Assistant Editor |
| Editing | 박현진 | Senior Colorist |
