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소지섭 as Woo-jin |
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손예진 as Soo-a |
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Kim Ji-hwan as Young Ji-ho |
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고창석 as Hong-gu |
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이준혁 as Swimming Instructor |
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손여은 as Hyun-jung |
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이유진 as Young Woo-jin |
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김현수 as Young Soo-a |
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배유람 as Young Hong-goo |
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서정연 as Seo-bin's Mother |
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박서준 as Ji-ho |
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공효진 as Han Bok-nyeo |
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Lee Min-sung as Seo-bin |
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이승준 as PE Teacher |
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Shin Woo-hee as Homeroom Teacher |
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조하석 as Relative |
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Seo Young-sam as Bus Driver |
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정수빈 as So-jung |
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백현우 as Math Teacher in the Past |
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정서인 as Relative |
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이보영 as Cafe |
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최요운 as Professor |
| Art | 박재완 | Props |
| Production | 양수정 | Producer |
| Crew | 윤대원 | Martial Arts Choreographer |
| Writing | 김재중 | Adaptation |
| Visual Effects | Bae Sang-min | Matte Painter |
| Writing | 市川拓司 | Novel |
| Production | Kim Woo-jae | Co-Producer |
| Lighting | 박준규 | Lighting Director |
| Editing | 엄태식 | Digital Colorist |
| Directing | 이장훈 | Director |
| Writing | 이장훈 | Screenplay |
| Art | Choi Ki-ho | Production Design |
| Production | Cha Won-chun | Executive Producer |
| Writing | 강수진 | Screenplay |
| Editing | 남나영 | Editor |
| Production | 김재중 | Producer |
| Camera | Kim Seong-o | Key Grip |
| Camera | 조상윤 | Director of Photography |
| Costume & Make-Up | 김정원 | Costume Design |
| Costume & Make-Up | 이서진 | Makeup & Hair |
| Camera | Wang Ho-sang | "B" Camera Operator |
| Sound | 방준석 | Original Music Composer |
