A mysterious "Atonement Newspaper" begins circulating in a classroom, inciting students to brutally "punish" Nanase Hiramatsu for the crimes of her murderous father. As a hidden mastermind experiments with the power of manipulation, the cycle of violence expands to include the popular Madoka Yuuki and the jealous Narumi Aizawa. Through calculated writing, the orchestrator turns the students' darkest desires against one another, proving that the pen can be a weapon of absolute control.