Circle

Yeo Jin-goo

as

Kim Woo-Jin

Kim Kang-woo

as

Kim Joon-Hyuk

Gong Seung-yeon

as

Han Jung-Yeon

Lee Gi-kwang

as

Lee Ho-Soo

Kwon Hyuk-soo

as

Detective Oh

An Woo-yeon

as

Kim Beom-Gyoon

Kim Joong-ki

as

Kim Kyu-Cheol

Min Sung-wook

as

Lee Hyun-Seok

Nam Myung-ryeol

as

Yoon Hak-Joo

Lee Hwa-Kyum

as

Secretary Shin

Seo Hyeon-cheol

as

Hong Jin-Hong

Song Young-gyu

as

Hwang Yong-Woo

Oh Eui-sik

as

Lee Dong-Soo

Kim Ye-joon

as

Kim Bum-gyun (...

Jung Ji-hoon

as

Kim Woo-jin (y...

Jung In-sun

as

Park Min-young