Question: Which South Korean horror film series is noted as helping to generate the explosion of the New Korean Wave cinematic movement containing movies like "Wishing Stairs"?

Context articles: Tell Me Something
Whispering Corridors (film series)
Thirst (2009 film)
Korean Wave
Wishing Stairs
Whispering Corridors
Big Bang (South Korean band)
Dead Friend
Song Ji-hyo
Hallyuwood

Tell Me Something () is a 1999 South Korean Thriller-Horror-Crime film directed by Chang Yoon-hyun.
 It was an early South Korean film to find success abroad as part of the Korean Wave, and was selected to appear in the 2001 New York Korean Film Festival.
Whispering Corridors (; also known as Ghost School and Ghost School Horror) is a South Korean horror film series.
 The series uses an all-girls high school as the backdrop for each of its films and doesn't share a continuing plot.
 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.
Thirst (Korean: 박쥐; Bakjwi ; literally: "Bat") is a 2009 South Korean horror film written, produced and directed by Park Chan-wook.
 It is loosely based on the novel "Thérèse Raquin" by Émile Zola.
 The film tells the story of a Catholic priest—who is in love with his friend’s wife—turning into a vampire through a failed medical experiment.
 Park has stated, "This film was originally called 'The Bat' to convey a sense of horror.
 After all, it is about vampires.
 But it is also more than that.
 It is about passion and a love triangle.
 I feel that it is unique because it is not just a thriller, and not merely a horror film, but an illicit love story as well."
 The film won the Jury Prize at the 2009 Cannes Film Festival.
 It is the first mainstream Korean film to feature full-frontal male nudity.
The Korean Wave (,    , a neologism literally meaning "flow of Korea") is the increase in global popularity of South Korean culture since the 1990s.
 First driven by the spread of K-dramas and K-pop across East, South and Southeast Asia during its initial stages, the Korean Wave evolved from a regional development into a global phenomenon, carried by the Internet and social media and the proliferation of K-pop music videos on YouTube.
Wishing Stairs ( also known as Whispering Corridors 3: Wishing Stairs) is a 2003 South Korean horror film.
 It is the third installment of the "Whispering Corridors" film series set in girls high schools, but, as with all films in the series, is unrelated to the others; apart from a song being sung in one scene that is a pivotal plot in "Voice".
Whispering Corridors () is a 1998 South Korean horror film.
 It was part of the explosion in Korean cinema following the liberalization of censorship in the aftermath of the end of the country's military dictatorship, and makes a strong social commentary on authoritarianism and conformity in the harsh South Korean education system.
Big Bang (Korean: 빅뱅 ) is a South Korean boy band formed by YG Entertainment.
 With members G-Dragon, T.O.P, Taeyang, Daesung, and Seungri, they are often cited as one of the most influential acts to shape the K-pop industry, helping spread the Korean Wave internationally and gaining the honorific title "Kings of K-pop".
 Their experimental and diverse use of music genres, personal involvement in producing their own records, and stage performances have been admired by music critics and served as influence to several K-pop and international artists.
Dead Friend (; lit.
 "The Ghost") is a 2004 South Korean horror film.
 It is one of a number of South Korean horror films set in high school; the trend began with 1998's "Whispering Corridors".
Cheon Soo-yeon (born Cheon Seong-im on August 15, 1981), better known by her stage name Song Ji-hyo, is a South Korean actress and model.
 She made her acting debut in "Wishing Stairs" (2003), one of the horror "Whispering Corridors film series".
 She then received further recognition for her roles in the romantic comedy drama "Princess Hours" (2006), the historical drama "Jumong" (2006), the historical film "A Frozen Flower" (2008), the crime film "New World" (2013), the romantic comedy drama "Emergency Couple" (2014), and family melodrama "My Wife's Having an Affair this Week" (2016).
Hallyuwood, a compound word combining the word "Hallyu" (Korean Wave) with "wood" from Hollywood, is the informal term popularly used to describe the Korean-language entertainment and film industry in South Korea.
 Koreans use the term "Hallyu" to describe the Korean Wave phenomenon which has swept across the shores of almost every single country in the Asia region, and even increasingly beyond.
 The trend has been reported by CNN as "hallyu-wood".
 The term Hallyuwood has been used and quoted in various news articles, journals, books and symposiums to describe people, places and events related to the Korean Wave such as a planned "Hallyuwood Walk of Fame" in the glitzy Gangnam District in Seoul to a "bibimbap" dish called "Bibigo: The Hallyuwood hopeful".