Series Cast 16

1. 

   Kim Hyun-soo

   Ko Seo-Yeon (12 Episodes)

2. 

   Jang Dong-yoon

   Han Ji-Hoon (12 Episodes)

3. 

   Seo Ji-hoon

   Bae Joon-Young (12 Episodes)

4. 

   Seo Young-joo

   Lee So-Woo (12 Episodes)

5. 

   Seo Shin-ae

   Park Cho-Rong (12 Episodes)

6. 

   Cho Jae-hyun

   Han Kyung-Moon (12 Episodes)

7. 

   Shin Se-hwi

   Lee Joo-Ri (12 Episodes)

8. 

   Ahn Seung-gyun

   Choi Seung-hyeon (12 Episodes)

9. 

   Ahn Nae-sang

   Ko Sang-Joong (12 Episodes)

10. 

    Kim Yeo-jin

    Seo-Yeon's mother (12 Episodes)

11. 

    Shin Eun-jung

    Teacher Kim (12 Episodes)

12. 

    Yoo Ha-bok

    Principal (12 Episodes)

13. 

    Shim Yi Young

    Detective Oh (12 Episodes)

14. 

    Ahn Sol-bin

    Lee Yoo-Jin (12 Episodes)

15. 

    Ji E-su

    homeroom teacher (12 Episodes)

16. 

    Lee Do-gyeom

    Lee Sung-Min (12 Episodes)

Series Crew 5