Lee Seung-gi
Kang Joon-soo
Moon Chae-won
Kim Hyun-woo
Lee Seo-jin
Lee Dong-jin
Jung Joon-young
Andrew Yeom
Go Yoon
Jae-joong
Park Soo-young
Min-ah
Ryu Hwa-young
Hee-jin
Sieun
Joon-hee
Ha Kyoung-min
Han Seong-goo
Park Eun-ji
Cha Myung-sun
Im Ha-ryong
Principal
Kim Kap-soo
Joon-soo's Father
Lee Kyung-jin
Joon-soo's Mother
Song Young-chang
HQ Chief
