Jeon Do-yeon as Hee-soo

Ha Jung-woo as Byoung-woon

Kim Hye-ok as Mrs Han

Oh Ji-eun as Se-mi

Choi Il-hwa as Man at Cousin's House

Gi Ju-bong as Man at Cousin's House

Jang So-yeon as Eun-jeong

Jo Si-nae as Professor

Kim Hee-jung as So-yeon

Kim Joo-ryoung as So-yeon's Mother

Kim Joong-ki as Cousin

Kim Young-min as Dae-hee

Go Seo-hee as Notebook Lady

Park Hye-rim as Female Parking Lot Worker

Jeong Woo-hyuk as Racetrack Man

Han Hyo-joo as Woman at a Bus Stop

Min Young as Racetrack Staff