Whispering Corridors 4 : Voice Letter
Technique
Casting
Kim Ok-vin
Young-eon
Seo Ji-hye
Seon-min
Cha Ye-ryun
Cho-ah
Kim Seo-hyung
Hee-yeon
Lim Hyun-kyung
Hyo-jung
Jeon Yeo-jin
Hwa-jung
Eun-kyeong Na
Classmate
