Jang Hyun-sung

Sang-hyun

Choi Jung-won

Eun-a

Oh Yoo-jin

Soo-a

Choi Min-chul

Park Dong-sik

Hwang Jeong-min

Kim Mi-hye

Jung Da-bin

Park So-won

Kang Shin-chul

Homeroom teacher

Choi Hee-seo

Math teacher