Series Cast 20

1. 

   Yeo Jin-goo

   Jung Jae-min (12 Episodes)

2. 

   Kim Seol-hyun

   Baek Ma-ri (12 Episodes)

3. 

   Lee Jong-hyun

   Han Shi-hoo (12 Episodes)

4. 

   Song Jong-ho

   Han Yoon-jae (12 Episodes)

5. 

   Lee Il-hwa

   Kang Min-ha (12 Episodes)

6. 

   Gil Eun-hye

   Jo Ah-ra (12 Episodes)

7. 

   Ahn Kil-kang

   Baek Seung-hoon (12 Episodes)

8. 

   Yoon Ye-hee

   Song Sun-hwa (12 Episodes)

9. 

   Kim Sun-kyung

   Won Sang-gu (12 Episodes)

10. 

    Park Gun-tae

    Hwang Bum-sung (12 Episodes)

11. 

    Jo Min-ki

    Jeong Byung-kwon (12 Episodes)

12. 

    Kim Ji-ah

    Min-seon (12 Episodes)

13. 

    Jung Hae-kyun

    Jo Jun-goo (12 Episodes)

14. 

    Lim Seung-dae

    Shim Hyeong Jun (12 Episodes)

15. 

    Yang Joo-ho

    Biology Teacher (12 Episodes)

16. 

    Lim Seong-eon

    Homeroom Teacher (12 Episodes)

17. 

    Kang Han-byul

    Young Han Shi-hoo (12 Episodes)

18. 

    Han Seo-jin

    Young Baek Ma-ri (12 Episodes)

19. 

    Ham Jin Sung

    Police Officer (12 Episodes)

20. 

    Lee Won Hee

    Vampire (12 Episodes)

Series Crew 9