Cast 19

1. 

   Jang Keun-suk

   Han Joon-soo

2. 

   Song Ha-yoon

   Kim Byul

3. 

   Moon Mason

   Han Woo-ram

4. 

   Go Gyu-pil

   Ki-seok

5. 

   Lee Moon-sik

   Subway Attendant (cameo)

6. 

   Oh Kwang-rok

   Gwang-rok (uncredited)

7. 

   Jeong Gyu-su

   Kim Byeol's Father (uncredited)

8. Jang Jung-hee

   Kim Byeol's Mother (uncredited)

9. 

   Kil Hae-yeon

   Ki-suk's Mother (uncredited)

10. 

    Park Hyun-suk

    Joon-soo's Mother (uncredited)

11. 

    Jeon Se-hong

    Joon-soo's Ex (uncredited)

12. 

    Jeong Min-seong

    Drunk Man (uncredited)

13. 

    Kim Do-yeon

    Ordinary Girl (uncredited)

14. 

    Kim Gu-ra

    Room Salon Customer (uncredited)

15. 

    Lee Cheol-min

    Police Officer (uncredited)

16. 

    Park Myung-soo

    Woo-ram (voice) (uncredited)

17. 

    Song Min-hyung

    Teacher (uncredited)

18. 

    Yoo Ji-yeon

    Room Salon Girl (uncredited)

19. 

    Kim Dong-seok

    Doctor (uncredited)

Crew 9