Nam Si-heon / Koo Yeon-jun

Kwon Min-ju / Han Jun-hee

Jung In-gyu

Bae Mi-yeong

Bae Chi-won

Sung Hye-mi

Lee Su-jin

Byeon Da-hyeon

Park Ji-hui

Se-kwon

Bum-sun

Gye-sun

Ji Yong-seon

Dong-jun

Seo Na-eun

Kwon Do-hun

Oh Chan-yeong / Oh Chan-hui

Sang-ho

Soo-kyung

Koo In-yeong (Eps 1, 7, 8)

Seul-ki

Han Jun-hee (young)

Mi-sun

Park Min-sang

Blind date student

Blind date student

Detective Yoon-ho

Electronics repairman

Anchor (Eps 1)

Silver Lining employee

Byung-ryul

Noksan High School chemistry teacher

Silver Lining employee

Kwon Sang-jo

Jung In-gyu (young)

Nam Si-heon (young)

Doctor

Bus driver

Doctor Choi Myung-il

Seung-ho

Noksan High School vice-principal

Jun-hee's grandmother

Jun-hee's friend

Doctor

Anchor

Prison guard

Hotel receptionist

Tae-ha

Park Do-hyeon

Waitress

Elderly pedestrian

Restaurant manager

Do-hyeon's girlfriend

Crying restaurant girl

Blind date student

Chan-yeong's mother

Oh Chan-yeong (young)

Chan-hui's caregiver

Detective Ki-won

Photo studio owner

Chang-joo

Yoon-mi

Seo Hyeon-uk

Kang Jung-woo

Crying boy