Seol Si-yeon
Si-yeon
Bae Yeon-woo
Yeon-woo
Park So-jung
So-jung
Han Song-hee
Song-hee
![](https://image.tmdb.org/t/p/w92/jpZhHDejWOmOxDm1O3obqvwuEQ8.jpg)
Kang Suk-won
Teacher Suk-won
Na Do-yul
Teacher Do-yul
Kim Bo-Yeon
Teacher in the School Office
Kim Na-kyeong
Hapkido Master