Question: Who directed the 2008 South Korean film to which Love Story was adopted? 

Context paragraphs:
Crossing (2008 film): Crossing (also known as Keurosing) is a 2008 South Korean film directed by Kim Tae-kyun.  It was selected as South Korea's submission to the 81st Academy Awards for Best Foreign Language Film.  The film follows the journey of a North Korean man as he illegally leaves the country to find medicine for his sick wife, portraying the many hardships of the average North Korean citizen.  The film had 907,255 admissions in South Korea.

Thirst (2009 film): 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.

Once Upon a Time (2008 film): Once Upon a Time () is a 2008 South Korean film, directed by Jeong Yong-ki and adapted from a screenplay by Cheon Seong-il.  The film is a heist comedy film set in 1940s Korea, and stars Park Yong-woo and Lee Bo-young as a con artist and a jazz singer, respectively, who each plot to steal a valuable diamond from the Japanese authorities.  "Once Upon a Time" was the first major investment by SK Telecom's film division, established late 2007, and was released in South Korea on January 30, 2008, under the company's CH Entertainment banner.

Namwon: Namwon (] ; "Namwon-si") is a city in North Jeolla Province, South Korea.  Namwon is about 50 minutes from the provincial capital of Jeonju, which is almost three hours away from Seoul.  The official city flower is Royal Azalea (철쭉) while the city tree is the crape-myrtle (배롱나무) and the city bird is the swallow (제비).  Namwon is a small city located just outside Jirisan National Park, which has the largest set of mountains on the South Korean Mainland.  It also borders the Seomjin River, one of South Korea's more prominent rivers.  It is 3 hours and 15 minutes from the Seoul Central City Bus Terminal (via direct bus) and about one hour from both the U-Square Bus Terminal in Gwangju and the Jeonju Inter City Bus Terminal (depending on traffic).  It is called "the City of Love" because of the famous Korean love story of Chunhyang.  Gwanghallu Garden is a shrine to this love story.

A Man Who Was Superman: A Man Who Was Superman () is a 2008 South Korean film directed by Jeong Yoon-chul.  The film applies techniques of Magical realism to problems arising from the Narcissism of small differences that plagues the modern Korean conscience.

Death Bell: Death Bell () is a 2008 South Korean film.  The only Korean horror film released over the summer of 2008, it is the first feature by former music video director Chang (real name Yoon Hong-seung), who also co-wrote the screenplay.  "Death Bell" stars Lee Beom-soo in his first horror film role, and K-pop singer Nam Gyu-ri in her acting debut.  Set in a Korean high school, the film's native title refers to "gosa", the important midterm exams that all students are required to sit.

Love Story (manhwa): Soonjung Manhwa (; lit.  "Pure/Romantic Comic" or the Korean version of shōjo manga; internationally, it is also known under the titles Love Story and Crush On You) is a webtoon by Kang Full.  It became a hit sensation, building up an enthusiastic netizen audience and drawing in more than 60 million page views on web portal Daum.  The story revolves around two unconventional romances with a noticeable age disparity.  It was adapted into the live action movie "Hello, Schoolgirl".

Scandal Makers: Scandal Makers (; lit.  Speedy Scandal) is a 2008 South Korean film written and directed by Kang Hyeong-cheol and starring Cha Tae-hyun in the lead role.  This was director Kang's first film and the highest grossing Korean film of the year.  A Chinese remake was released in 2016.

Hello, Schoolgirl: Hello, Schoolgirl (; literally "pure/romantic comic," the Korean version of shōjo manga) is a 2008 South Korean film.  Adapted from "Love Story", a popular webtoon by Kang Full, it is the second film directed by Ryoo Jang-ha.  It stars Yoo Ji-tae, Lee Yeon-hee, Chae Jung-an, and Kang-in.

Star's Lover: Star's Lover (; also known as Celebrity's Sweetheart) is a 2008 South Korean television series starring Choi Ji-woo and Yoo Ji-tae that aired on SBS.  A love story between a star actress and an ordinary man, director Boo Sung-chul said the series was inspired by the 1999 film "Notting Hill".

Supporting paragraphs: Love Story (manhwa) Hello, Schoolgirl
Answer: Ryoo Jang-ha