Choi Ho Jin

Choi Ho Jin, born in Seoul, is a Korean model. Standing 5-foot-9, Jin had always been told that he had a face and body for modeling but he never really thought of modeling as a career.

In the year 2006, a family member convinced Jin to get a portfolio done and have it submitted to various modeling agencies in Korea. Thinking it would not hurt to attempt, he had his portfolio completed and submitted his images.His exposure in Men's Health photo shoot and fashion show really helped Jin jump start his career and has now branched out into acting.

 source google

Baek Sung Hyun

Baek Sung-hyun(born January 30, 1989) is a South Korean actor. Baek Sung-hyun debuted in the 1994 film I Wish For What Is Forbidden To Me when he was five years old. The child actor practically grew up onscreen, playing the roles of an adorable son in several MBC series including See and See Again in 1998 and Housewife’s Rebellion in 2000. In his teenage years, he played the younger versions of the male leads in dramas such as Damo (MBC, 2003), Emperor of the Sea (KBS, 2004) and Stairway to Heaven (SBS, 2003) -- the last his breakout role. And while it is no simple task for child actors to break away from their past image, Baek pulled off acting that is more mature and romantic for his age.

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Ha Seok Jin

Ha Seok-jin (born February 10, 1982) is a South Korean film and television actor.

2AM : Im Seulong

PROFILE:

Name: Im Seulong
Nicknames: One-ee, Ongseulee, Ongong
Birth Date: May 11,1987
Height: 186cm / 5'11
Weight: 75kg / 159lbs
Specialty: Singing, English, Chinese
Hobby: singing, shopping, movies
Education: Daejin University (Material Engineering)
Family: 1 older sister
Fave Musicians: Maxwell, Kim Johan, Lee Seungchul, JYP
Talent Agency: JYPE
Label: PlayCube

 source google