- Drama: Bad Guy (literal title) / Bad Boy
- Revised romanization: Nabbeun Namja
- Hangul: 나쁜남자
- Director: Lee Hyeong-Min
- Writer: Kim Jae-Eun, Lee Do-Young
- Network: SBS
- Episodes: 17
- Release Date: 2010-May-26 to 2010-Aug-05
Geon Ok (Kim Nam-Gil) is a sexy man & highly ambitious. Geon Ok attempts to get a Chaebol group by using his fatal charms and cunning mind. Jane (Han Ga-In) is a strong women who stands by her man, Geon Ok. She will attempt to protect their love.
Tera (Oh Yeon-Su) was born as the first daughter in a Chaebol family. She has never said no to her parents and went through an arranged marriage. She lives her life like the typical upperclass housewife. She then meets Geon Ok and throws herself into a heated affair.
- Bad Guy Torrent Files will takeover the SBS Wed. & Thurs 21:55 time slot previously occupied by “Prosecutor Princess“.