"Let time take its course." "But..." "I know there is no cure. I will make the most out of the time I have left in this world" Heart-wrenching sobs filled the room. A new transfer student arrives at Kunugigaoka Junior High. For some reason, she is sent to Class 3E. And she does exceedingly well in class. Which is kind of strange. How is a junior high school student able to damage a yellow Mach 20 octopus that much? How is she that smart? Just who is this girl? Even the assassins seem to fear her. Yūsei Matsui owns Assassination Classroom.