Top Billed Cast

1. 

   Yoon Jin-seo

   Kim Ga-in

2. 

   Lee Ki-woo

   Hyung-joong

3. 

   Park Ki-woong

   Hong Seok-min

4. 

   Kim Min-kyung

   Ji Seon-mo

5. 

   Yeon Je-wook

   Choi Sang-gyeong

6. 

   Jeong Yu-mi

   Lee Myeong-hee

7. 

   Kim So-eun

   Kim Ga-yun

8. 

   Ahn Nae-sang

   Ga-in's Teacher

9. 

   Jeong In-gi

   Detective Jo

10. 

    Ahn Shin-woo

    Hong Jae-sun

11. 

    Kim Jin-geun

    Hwang Dae-yong

12. 

    Kim Do-yeon

    Kim Mi-joo

13. 

    Jeong Wook

    Hyung-joong's Father

14. 

    Kim So-eun

    Kim Ga-geon

15. 

    Oh Yeon-seo

    Chung Eun-gyeong

16. 

    Jeon Kuk-hwan

    Ji-sun's Father

17. 

    Jo Yeon-hee

    Kim Ji-sun

18. 

    Baek Joo-hee

    Hyung-joong's Mother

19. 

    Lee Kan-hee

    Ga-in's Mother

20. 

    Seo Yu-jeong

    Ga In's youngest aunt

21. 

    Ham Yu-seon

    Sang-kyung

22. 

    Kim Soo-woong

    Adult Relative

23. 

    Park Seoung-tae

    Dae-yong's Mother

24. 

    Lee Sae-byeol

    Visitor

25. 

    Kang Lee-seok

    Young Park Hyun-joong

26. 

    Park Sin-woo

    Ending Student