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.

A romantic comedy that follows the story of a top actress who, after reaching the peak of her career and even winning the youngest-ever Best Actress award, suffers an accident and finds herself transported 25 years into the future.

An incident unfolds when a film crew goes to a reservoir to update the road view where an unidentified figure was filmed, and they encounter something in the dark, deep waters.