http://www.imdb.com/title/tt1190539/
Joong-ho is a dirty detective turned pimp in financial trouble as several of his girls have recently disappeared without clearing their debts. While trying to track them down, he finds a clue that the vanished girls were all called up by a same client whom one of his girls is meeting with right now.
- Written by sonic_bang

Synopsis
http://en.wikipedia.org/wiki/Sungkyunkw ... l#Synopsis
Set in a period where society does not allow females to be educated nor employed, Kim Yoon Hee (Park Min Young) disguises herself as her brother, Kim Yoon Shik, in order to make ends meet for her family. She goes through a series of odd jobs, mainly at a local bookstore, before she gets offered a chance to increase her earnings by becoming a substitute test-taker (an illegal act) for the upcoming entrance examination in the prestigious Sungkyunkwan. She gets caught by the upright Lee Sun Joon (Park Yoo Chun), who later acknowledges Yoon Hee's talents, and even encourages her to enroll in the university. There, she must bear with the endless mischief of upperclassman Gu Yong Ha (Song Joong-Ki), put up with the constant mood swings of roommate, Moon Jae Shin (Yoo Ah In), avoid getting in trouble with the strict, student body president, Ha In Soo (Jun Tae Soo), keep her secret from being discovered, all the while trying to maintain her growing affections for Lee Sun Joon, at bay.
It's good fun for all including early teens thru old farts.