Ryu Da-in

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.

The series follows the bittersweet relationship between a banchan shop owner whose daughter enters the war of Korea's college entrance exams, and a top hagwon instructor.

A high school girl who turns to stimulants to survive a hyper-competitive school begins hearing the voices of the dead, drawing her into a dangerous connection with a newly appointed school pastor who secretly performs exorcisms.