Story : The 16th Pyramid Game begins, and Ha Rin suggests choosing a classmate who will become a permanent Grade F. Before the voting takes place, Soo Ji tells the class that Ye Lim was attacked and hospitalized. The class decides to vote on whether to stay. playing or not, and the entire process is broadcast live, causing the school to be in an uproar. Meanwhile, Ja Eun tells Soo Ji what she did to Ha Rin when they were little.