Choi Yoon-seo

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.

After a university merges its modeling and computer engineering departments, the charming model Min-hak and the perfectionist coder Yeon-san, polar opposites in every way, unexpectedly fall for each other.