Kang Soo-youn as Seo-hyun

Kim Hyun-joo as Jung-yi

Ryu Kyung-soo as Sang-hoon

Uhm Ji-won as Se-yeon

Lee Dong-hee as Chairman

Han Woo-yeol as Jae-kyung

Lee Ga-kyung as Researcher 2

Shin Min-jae as Researcher 3

Kim Sun-hyuk as Researcher 5

Lee Hyun-kyun as Doctor

Park So-yi as Young Seo-hyun

Lee Seung-chan as Suit Man 2

Kim Tae-jun as Buffet

Do Yong-gu as General 1

Hong Seok-bin as General 2

Jeon Jung-il as Suit General 1

Son Young-soon as Old Jung-yi

Cha Young-ju as Nurse

Cha Hee as Woman in Suit

Park So-eul as Monorail Kid