A Mysterious Man

Lee Dong-wook

Kwon Jung-rok

Yoo In-na

Oh Yun-seo

Lee Sang-woo

Kim Se-won

Son Sung-yoon

Yoo Yeo-reum

Park Ji-hwan

Lee Du-seop

Oh Jung-se

Yeon Jun-gyu

Shim Hyung-tak

Choe Yun-hyeok

Park Kyung-hye

Dan Mun-hui

Jang So-yeon

Yang Eun-ji

Kim Hee-jung

Kim Hae-yeong

Lee Jun-hyeok

Yeon Jun-seok

Oh Eui-sik

Gong Hyuk-Joon

Kim Chae-eun

Lee Joo-Young

Kim Hee-chang

Chief prosecutor

Jin So-yeon

Yeo Reum's legal secretary

Do Won

Subway's part-timer

Jay Kim

Lee Kang-joon [Yun-seo's stalker]

Park Ji-il

Kwon Jae-bok [Jung-rok's father]

Kim Oh-bok

Lee Kang-joon's secretary