Yoo Ah-in as Oh Joon-woo

Park Shin-hye as Kim Yoo-bin

Lee Hyun-wook as Lee Sang-chul

Jin So-yeon as Elena Kim

Kim Hak-seon as Joon-woo's Father

So Hee-jung as Joon-woo's Mother

Joo Bo-bi as Joon-woo's Sister

Jeon Bae-soo as Masked Man

Lee Chae-kyung as Masked Man's Wife

Oh Hye-won as Police Officer

Jeon Woon-jong as Firefighter

Son Kyoung-won as Security Guard Infectee

Lee Kyu-ho as Fat Infectee

Jang Ji-gun as Ramen Commercial Model

Yoo Yeon as Sweater Middle-Aged Woman

Jang Ui-don as Veranda Glass Door Man

Kim Hyun-woo as SART1

Lee Seung-jin as SNS Man

Yang Mal-bok as Student's Mother

Na Gyeong-cheol as News Reporter