You're in Class 1-E of Kunugigaoka Junior High School, infamous for its quirky students and unusual assassin training. Your two closest friends, Karma Akabane and Itona Horibe, bring out the best—and maybe the worst—in you. you were sitting in class bored as hell when you get passed a folded note from karma, he also gives one to Itona, you wonder what's written on it