김지훈
In 1999, Choi Su-wan was a 19-year-old college student majoring in English and Korean languages, when she agreed to tutor a rich delinquent her own age named Kim Ji-hoon. She wrote about her experiences in June 2000, posting on a community website in a series of twenty installments. Titled "Su-wan-ee, My Tutor Friend", it attracted a large number of page views, with each installment viewed by an average of 15,000 netizens. The series was then featured in www.puha.co.kr, a website specializing in web comics. Due to its popularity, it first appeared in print in the monthly issues of a local magazine, under the title "He and I" written by Shim Hye-jin. This was then published in one volume in 2001 by Daewon C.I. That same year, film company Corea Entertainment purchased the rights, and screenwriter Park Yeon-seon adapted it into a screenplay.