가면

수애

as Byun Ji-sook / Seo Eun-ha

주지훈

as Choi Min-Woo

연정훈

as Min Seok-hoon

유인영

as Choi Mi-Yeon

정동환

as Byun Dae-sung

양미경

as Kang Ok-soon

이호원

as Byun Ji-hyuk

전국환

as Chairman Choi Doo-hyun

Jo Yoon-woo

as Oh Chang-soo

박준금

as Mrs. Song

조한선

as Kim Jung-tae

신동훈

as [Big guy]

Amy Aleha

as [Scientist]

Lee Sung-deuk

as Byun Ji Sook's high school classmate

Lee Yoon-jeong

as Byun Ji-sook [Young]