Kim Sang-kyung as Jeong Tae-hoon

Lee Sun-bin as Han Young-ju

Yoon Kyung-ho as Seo Woo-sik

Seo Young-hee as Han Gil-ju

Jang Hyuk-jin as President Cho

Kim Jung-tae as Han Hyun-jong

Song Young-gyu as Jeong Kyung-han

Lee Ji-hoon as In-ho

Seong Byeong-suk as Soon-im

Kim Ha-eon as Jung Min-woo

Kim Kyung-sik as Ministry of Health and Welfare

Kim Dong-hwan as O2 Staff

Brad Curtin as

Oh Dong-min as Reporter

Lim Young-joo as Reporter

Ko Seo-jeong as Audience

Cho Yu-jin as Victim 4