Im Gi-hong plays as Yang Moo-jin in Business Proposal.
Im Gi-hong is the top #1 member of the cast and appears in 16 episodes.

Seol In-a plays as Jin Young-seo in Business Proposal.
Seol In-a is the top #2 member of the cast and appears in 10 episodes.

Sejeong (세정) is a South Korean singer-songwriter and actress signed under Jellyfish Entertainment. After coming into prominence as the runner-up on the hit idol competition show “Produce 101,” she debuted in 2016 as a solo artist and member of now-disbanded girl groups I.O.I and Gugudan. In 2017, she was cast in her first leading drama role in KBS’s “School 2017.”

Kim Se-jeong plays as Shin Ha-ri in Business Proposal.
Kim Se-jeong is the top #3 member of the cast and appears in 10 episodes.

Kim Min-gue is a South Korean actor. He appeared as the Assistant Detective in Crime Scene 3. He gained recognition for his role in the historical drama Queen: Love and War. He also played Kang Ji-wook in the Korean series Backstreet Rookie. Wikipedia

Kim Min-gue plays as Cha Sung-hoon in Business Proposal.
Kim Min-gue is the top #4 member of the cast and appears in 10 episodes.

Ahn Hyo-seop plays as Kang Tae-moo in Business Proposal.
Ahn Hyo-seop is the top #5 member of the cast and appears in 10 episodes.

Lee Duck-hwa plays as Baek Hyun-moo in Business Proposal.
Lee Duck-hwa is the top #6 member of the cast and appears in 10 episodes.

Kim Kwang-kyu (김광규) is a South Korean actor.He made his acting debut in 1999 in Dr. K, and its director fellow Busan native Kwak Kyung-taek later cast him in a small but memorable role as a physically abusive teacher in the 2001 box-office hit Friend. Kim continued acting in both television and film as a supporting actor, notably in, "The Secret of Coocoo Island" (2008), "Scent of a Woman" (2011), and "I Can Hear Your Voice" (2013). He also appears on the reality shows I Live Alone (since 2013) and Three Meals a Day (2015). Kim Kwang-kyu has received many awards, such as the Popularity Award in a Sitcom at the MBC Entertainment Awards in 2008, Excellence Award in a Variety Show on MBC Entertainment Awards in 2013.

Kim Kwang-kyu plays as Shin Joong-hae in Business Proposal.
Kim Kwang-kyu is the top #7 member of the cast and appears in 10 episodes.

Jung Young-joo plays as Han Mi-mo in Business Proposal.
Jung Young-joo is the top #8 member of the cast and appears in 10 episodes.

Kim Hyun-sook plays as Yeo Eui-joo in Business Proposal.
Kim Hyun-sook is the top #9 member of the cast and appears in 10 episodes.

Song Won-seok plays as Lee Min-woo in Business Proposal.
Song Won-seok is the top #10 member of the cast and appears in 10 episodes.