Lee Joo-young

as Yoon-young

Koo Kyo-hwan

as Sung-won

Moon So-ri

as Lee Kyung-jin

Chun Woo-hee

as Maggie (voice)

Park Kyung-hye

as Radiologist

Park Jong-hwan

as Gak Granger

Kwon Hae-hyo

as Maggie's Father

Kim Kkob-bi

as Bookworm

Oh Hee-jun

as Hospital Patient

Dong Bang-woo

as Hospital Patient

Park Kang-seop

as Kang-sup

Don Mills

as Dong-hyun

Lee Zoo-young

as Ji-yeon

Shim Dal-gi

as Hospital Patient

Yi Ok-seop

as Callcenter (voice)

Kim Min-seo

as Young Lee Kyung-jin

Lee Ha-eun

as High School Student

Im Su-hyung

as Caregiver

Park Gil-su

as Laundrette Owner

Han Tae-ee

as Hospital Patient