Whispering Corridors (Korean: 여고괴담; Hanja: 女高怪談; RR: Yeogo goedam; also known as Ghost School and Ghost School Horror) is a South Korean supernatural horror film series. The series uses an all-girls high school as the backdrop for each of its films. Every Whispering Corridors film features a different plot, characters and settings. The series is notable for helping generate the explosion of the New Korean Wave cinematic movement, and dealing with taboo topics such as authoritarianism in the harsh South Korean education system, gay relationships and teen suicide, following the liberalization of censorship.^[1][2]

In the late '90s, screenwriter Oh Ki-min had written the screenplay for Whispering Corridors and showed it to various production companies, but the film was rejected by all of them. Meanwhile, producer Lee Choon-yun became aware of a Japanese horror film set in a school (Gakkō no Kaidan) and thought this type of horror film might work well in Korea. Since many Korean schools have urban legends tied to them, Choon-yun intended to produce a contemporary film version of the scary stories adapted from school legends. Choon-yun stated that another thing that motivated him was his antagonism toward the harsh South Korean education system. The producer thought that an all-girls high school was an attractive setting, stating that "It's a space that stimulates male curiosity, a place that men have never been in but are fascinated by. Conversely, for women, it's an environment that they can feel nostalgic about."

The film became a big commercial success, which led to several sequels. The films don't share any direct links with each other, due to the producer wanting Whispering Corridors to be a "brand name".^[3]