Meet Natsumi Nashio

There is a girl that is unkillable and her and Karma are surprisingly childhood best friends and rivals. She is almost as fast as Koro-Sensei and has a trashed life. But here's the thing she is in class 3-A... well maybe not for long... Find out how hard students in 3-E try to kill her and Koro-Sensei before graduation... Will they kill her or not?