Ansatsu kyoshitsu

1. Mission, Assassinate monster by March 20 2019. E class of a secondary Junior High school, were assigned to kill a monster that destroyed half the moon, they were given weapons that are unable to hurt humans but do affect Koro Sensei, as the story goes on, they dominate the art of assassination and become true assassins, The only rule to this assassination is, who ever kills them the government pays 10 billion zen. They assigned the classroom Koro sensei wanted to teach with this historical task, because not even the armies of the world can touch this monster, because of his un human strength and speed.

2. Target, Koro Sensei, the monster. He assigned humans to give him a secondary Junior high school classroom, so He could teach them how to kill him, because he wanted a match to fight before march 20, they ended up becoming a good teacher and student relationship, and his skills and super un human fast speed, makes his teaching methods almost perfect.

3. Principal character Nagisa Shiota. Is in the E secondary classroom, makes friends as the story goes, He realizes he has a gift to kill.

4. The E class was assigned the most dangerous task of earth, kill a march 20 10 billion zen monster from another planet, that destroyed half the moon and said that if they cannot kill him by march 20, 2019 Earth would be next.

5. March 20 of 2019 deadline, because of this problem, the government decided to infiltrate the highest of the highest class of assassins as teachers in the school so they could eliminate their target, but they realize is nearly impossible, Koro Sensei's speed is so high that you simply cannot touch him, they end up getting related to Koro Sensei as well and forget about the assassination, not much until there is 5 months left for the deadline that they realize its time for action after their millions of tries in different clever ways of assassination.