- Jeon Do-yeon
- Kim Hee-su
- Ha Jung-woo
- Jo Byeong-woon
- Seo Dong-won
- Man at Cousin's house
- Yang Eun-yong
- Hee-su's colleague
- Kim Hee-jung
- So-yeon
- Kim Hye-Ok
- Mrs Han
- Han Hyo-joo
- Woman at bus stop
- Choi Il-hwa
- Man at Cousin's house
- Oh Ji-eun
- Se-mi
- Si-nae Jo
- Professor
- Kim Joo-ryung
- So-yeon's mother
- Gi Ju-bong
- Man at Cousin's house
- Kim Jung-ki
- Cousin
- Min-Young
- Racetrack Staff
- Hye-rim Park
- Female parking lot worker
- Ko Seo-hie
- Notebook Lady
- Kim Seung-hun
- Mr. Kang
- Jang So-yeon
- Eun-jeong
- Jeong Woo-hyeok
- Racetrack Man
- Kim Young-min
- Dae-hee - Hong-ju's husband
