Won Bin

as Kim Jong-hyeon

Shin Ha-kyun

as Kim Seong-hyeon

Kim Hae-sook

as Mother

Lee Bo-young

as Mi-ryeong

Jung Ho-bin

as Young-joon

Cho Jin-woong

as Doo-shik

Kim Jong-man

as Danchu-gumung

Kim Kwang-kyu

as Mi-ryeong's Brother

Ko In-beom

as Eok-soo's Father

Kim Jin-hyeok

as Literary Club Senior

Kim Jung-tae

as Eok-soo

Kim Hye-jeong

as Doo-shik's Mother

Lee Sang-jik

as Flower delivery man