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남지현 as Park Jin-ju (Blue Bird on the Desk) |
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Jung Jin-an as Ma Jin-ju (Blue Bird on the Desk) |
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Kwon Eun-soo as So Young (U and Me) |
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오지혜 as Chul Goo's Mother (U and Me) |
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박보영 as Hee So (Relay) |
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손은서 as Gyu Ri (Relay) |
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성지루 as Teacher (Blue Birds on the Desk) |
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문성근 as Vice Principal (Relay) |
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정유미 as Health Teacher (Relay) |
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김미희 as (Relay) |
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Choi Won-tae as Choi Young-chan (Girl on the Run) |
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최요한 as |
| Production | Lee Chung-jik | Supervising Producer |
| Directing | 전계수 | Director |
| Directing | 김태용 | Director |
| Directing | Yoon Seong-ho | Director |
| Directing | 이현승 | Director |
| Directing | 방은진 | Director |
| Visual Effects | 장성호 | Visual Effects Supervisor |
| Editing | Sung Su-ah | Editor |
| Production | Park Kwan-su | Producer |
| Production | Min Hwan-ki | Supervising Producer |
| Editing | 김형주 | Editor |
| Costume & Make-Up | Han Myeong-suk | Costume Design |
| Camera | Choi Chan-min | Director of Photography |
| Writing | Yoon Seong-ho | Writer |
| Costume & Make-Up | 김나형 | Costume Design |
| Sound | 안복남 | Production Sound Mixer |
| Editing | 유성엽 | Editor |
