Assassination classroom is a show about this creature known as
Korosensei, a unknown creature that destroyed about 70% of the moon. Korosensei also wants to destroy the earth a year later but before he does, he wants to
teach a class of the middle schoo under achievers. The organization holding him soon allowed him to work at the school and telling the students it is their job to assassinate their teacher within a year to receive a great deal of cash. This, being their only chance to make a name for themselves, they agree and begin trying to murder their teacher while he teaches the students normal everyday subjects.
