ttyl is a young adult novel written by Lauren Myracle and is also the first book in the 'Internet Girls' series.
 In 2004, it gained attention for being the first novel written entirely in the style of instant messaging conversation.
 The novel was a "New York Times", "Publishers Weekly", and a "Book Sense" bestseller.
 "ttyl" is internet slang for "Talk to you later".
Do Re Mi Fa So La Ti Do () is a 2008 South Korean film based on the internet novel of the same title by Guiyeoni.
 Directed by Kang Geon-hyang (assistant director of "Romance of Their Own") and produced by New Crayon Entertainment.
 The film received 199,151 admissions nationwide.
My Lovely Sam-soon (; lit.
 My Name Is Kim Sam-soon) is a South Korean television series based on the internet novel of the same title by Ji Soo-hyun, which was published on March 9, 2004.
 Touted as the Korean version of "Bridget Jones's Diary", it starred Kim Sun-a (who gained 15 pounds for the role), Hyun Bin, Jung Ryeo-won and Daniel Henney.
 The series aired on MBC from June 1 to July 21, 2005 on Wednesdays and Thursdays at 21:55 for 16 episodes.
The Ash Garden is a novel written by Canadian author Dennis Bock and published in 2001.
 It is Bock's first novel, following the 1998 release of "Olympia", a collection of short stories.
 "The Ash Garden" follows the stories of three main characters affected by World War II: Hiroshima bombing victim Emiko, German nuclear physicist Anton Böll, and Austrian-Jewish refugee Sophie Böll.
 The narrative is non-linear, jumping between different times and places, and the point of view alternates between the characters; Emiko's story being written in the first person while Anton and Sophie's stories are written in the third person.
 Bock took several years to write the novel, re-writing several drafts, before having it published in August 2001 by HarperCollins (Canada), Alfred A. Knopf (USA) and Bloomsbury (UK).
He Was Cool (; lit.
 "That Guy was Cool") is a 2004 South Korean film based on the same-titled 2001 Internet novel written by Guiyeoni.
 The film was released in South Korean cinemas on July 23, 2004 and was the 35th most attended film of the year with 800,000 admissions.
Wu Kong () is a 2017 Chinese fantasy-action-adventure film directed by Derek Kwok and produced by Huang Jianxin, starring Eddie Peng in the title role alongside Ni Ni, Shawn Yue, Oho Ou and Zheng Shuang.
 It is based on a popular internet novel titled "Wukong Biography" written by Jin Hezai.
 Set 500 years before the Monkey King wreaks havoc in the heavenly kingdom, it tells the stories of Wukong who, unwilling to bow down to his own destiny, sets out to rebel against the gods.
 The film was released in China on 13 July 2017.
The Lost Tomb () is a 2015 Chinese web series based on the internet novel "Daomu Biji".
 The series will have 8 seasons filmed over a period of 8 years.
 The first season premiered on iQiyi on 12 June 2015.
Lee Hwan-kyung (born 1970) is a South Korean film director and screenwriter.
 Lee debuted with "He Was Cool" (2004).
 His next two features, "Lump Sugar" (2006) revolves around Si-eun who dreams of becoming a jockey and "Champ" (2011), which is based on a true story, depicts the relationship between a recently injured racehorse and the jockey who is gradually losing his eyesight.
 His fourth feature "Miracle in Cell No. 7" (2013) became the biggest hit of the year with more than 12.32 million viewers.
Eighteen, Twenty-Nine (; also known as 18 vs. 29) is a 2005 South Korean television series starring Park Sun-young and Ryu Soo-young.
 Based on the Internet novel "The 4321 Days We Shared", the romantic comedy series aired on KBS2 from March 7 to April 26, 2005 on Mondays and Tuesdays at 21:55 for 16 episodes.
Dreaming in Cuban is the first novel written by author Cristina García, and was a finalist for the National Book Award.
 This novel moves between Cuba and the United States featuring three generations of a single family.
 The novel focuses particularly on the women—Celia del Pino, her daughters Lourdes and Felicia, and her granddaughter Pilar.
 While most of the novel is written in the third person, some sections are written in the first person and other sections are epistolary.
 The novel is not told in linear fashion; it moves between characters, places and times.

Question: Lee Hwan-kyung debuted with a movie in 2004 that was based on an Internet novel written by this person?
Answer: Guiyeoni