Mask

Soo Ae

Byun Ji-sook / Seo Eun-ha· 20 ep

Ju Ji-hoon

Choi Min-Woo· 20 ep

Yeon Jeong-hun

Min Seok-hoon· 20 ep

Yoo In-young

Choi Mi-Yeon· 20 ep

Jeong Dong-hwan

Byun Dae-sung· 20 ep

Yang Mi-kyung

Kang Ok-soon· 20 ep

Lee Ho-won

Byun Ji-hyuk· 20 ep

Jeon Kuk-hwan

Chairman Choi Doo-hyun· 20 ep

Jo Yoon-woo

Oh Chang-soo· 20 ep

Park Joon-geum

Mrs. Song· 20 ep

Jo Han-sun

Kim Jung-tae· 20 ep

Shin Dong-hoon

[Big guy]· 20 ep

Amy Aleha

[Scientist]· 20 ep

Lee Sung-deuk

Byun Ji Sook's high school classmate· 20 ep

Lee Yoon-jeong

Byun Ji-sook [Young]· 20 ep

Choi Kwon Soo

Byeon Ji Hyeok [Young]· 1 ep