Every last Thursday of the month at an all-girls high school, the students of Class 2–5 cast their votes in a popularity poll. The results classify them into Grades A, B, C, D, and F. If they fall into Grade F, they become legitimate victims of school violence.
Seong Su-ji
Baek Ha-rin
Myung Ja-eun
Im Ye-rim
Ko Eun-byeol
Bang Woo-yi
Kim Da-yeon
Seo Do-ah
Shim Eun-jeong
Song Jae-hyung
Oh Sung-a
Ra Hae-jun
Pyo Ji-ae
Koo Seol-ha
Yoon Ye-won
Joo Seung-yi
Jung Yeon-doo
Park Ji-young
Cho Yu-rim
Shin Shin-ye
Choi Yu-hyun
Cha Seon-ju
Do Mi-young
Lee Bo-hyun
Yang So-young
Cho Woo-ri
Principal Im Soon-ae
Yoon Na-hee
Teacher Choi
Teacher Hong
Teacher Ahn
Teacher Park
School Nurse
Teacher Im Ju-hyung
Teacher Jeon
Jo Seung-hwa
Sung Hee-suk
Byun Cho-soon
Baek Hyun-joon
Choi Yi-hwa
Kang Sun-hee
Myung Ja-eun (child)
Ko Eun-byeol's Mom
Seo Joong-yeon
Kim Byung-oh
Kim Da-yeon's Mom
