Who Is She

Kim Hae-sook

as Oh Mal-soon

Jung Ji-so

as Oh Doo-ri

Jung Jin-young

as Daniel Han

Chae Won-been

as Choi Ha-na

Sowon

as Chan Mi

Lee Hwa-Kyum

as Li Na

Lee Kwang-hee

as Sang-joo

Yoo Jung-hoo

as

Jung Bo-seog

as Park Gap Yong

Seo Young-hee

as Ban Ji Suk [Choi Ha-na's mother, Choi Min-seok's wife, Oh Mal-soon's daughter]

In Gyo-jin

as Choi Min-seok

Cha Hwa-yeon

as Kim Ae Sim

Lee Dal

as Hoi

Oh Ji-yeon

as Joon Hee

현재연

as Soo Jin [member of the group Element]

Lee Ji-hyeon

as Min Ah

낸시 양

as Olla [member of the group Element]

장서원

as Jay [member of the group Element]

Kim Sung-Won

as Park Ja Young [Park Gap Yong's son]

Park Young-soo

as Park Young Joon

Hong Seo-jun

as Park Young Suk [Park Young Joon's brother]

Shin Shin-ae

as Shin Soon Ae

Lee Yong-i

as Jang Gwi Rye

Shin Yeon-sook

as Oh Choon Boon

Choi Jung-woo

as Byun Kang Suk

Kim Byeong-ok

as Mysterious taxi driver