Whispering Corridors 4: Voice Letter (2005)
Young-Eon es una alumna de un instituto femenino que muere misteriosamente una noche mientras practicaba clase de canto individualmente. Al día siguiente Young-Eon se da cuenta de que es un espíritu y nadie la puede ver ni oir. Más tarde descubre que solo su mejor amiga, Sun-Min, la puede escuchar pero no la puede ver. A partir de ahora su amistad atravesará todo tipo de adversidades. Fantasmas, crímenes, voces... adversidades que podrían causar el fin de su amistad y el fin de Young-Eon.
Directora: 최익환
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김옥빈 as Young-eon |
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서지혜 as Seon-min |
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차예련 as Cho-ah |
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김서형 as Hee-yeon |
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임현경 as Hyo-jung |
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전여진 as Hwa-jung |
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Eun-kyeong Na as Classmate |
| Writing | Joon-Seok Sol | Writer |
| Directing | 최익환 | Director |
| Production | 전려경 | Producer |
| Production | 이춘연 | Executive Producer |
| Writing | 최익환 | Writer |
| Sound | Jung Jin-wook | Production Sound Mixer |
| Directing | Choi Jin-young | Assistant Director |
| Costume & Make-Up | Yun Mi-ra | Costume Design |
| Production | 이미영 | Executive Producer |
| Camera | 김용흥 | Director of Photography |
