Sang Chu

Sangchu is a member of the duo Mighty Mouth. He appeared in the show Let's Go! Dream Team. Mighty Mouth is a Korean hip-hop duo composed of Sangchu and Shorry J. Their first single called Saranghae/I Love You was featured with Yoon Eun Hye (ex-member of Baby V.O.X.).

 source google

Kang Ji Seob

• Name: Kang Ji Sub (Kang Ji Seob)
• Real name: Kim Young Sub (Kim Young Seob)
• Profession: Actor
• Birthdate: 1981-Feb-06
• Height: 188cm
• Weight: 81kg
• Star sign: Aquarius
• Talent agency: Pan Entertainment

Source google & Dramawiki