The Princes`s Man

Title: 공주의 남자 / Gongjooeui Namja / The Princess’ Man
Chinese Title: 公主的男人
Genre: Period, romance
Episodes: 24
Broadcast network: KBS2
Broadcast period: 2011-July-20 to 2011-Oct-06
Air time: Wednesday & Thursday 21:55

Synopsis
A tragic love story between the daughter of Prince Suyang and grandson of Kim Jong Seo.
Cast
Moon Chae Won as Lee Se Ryung
Park Shi Hoo as Kim Seung Yoo
Song Jong Ho as Shin Myun
Hong Soo Hyun as Princess Kyung Hye
Lee Soon Jae as Kim Jong Seo
Kim Young Chul as Prince Suyang (later King Sejo)
Lee Min Woo as Jungjong
Jung Dong Hwan as Munjong
Lee Hee Do as Han Myung Hwa
Lee Hyo Jung as Shin Sook Joo
Production Credits
Director: Kim Jung Min
Screenwriter: Jo Jung Joo (조정주)

Source: http://www.koreandrama.org/?p=9090