Assassination Classroom

暗殺教室

Nagisa Shiota, a quiet student in Kunugigaoka Junior High's bottom-ranked Class 3-E, learns that his new homeroom teacher is a tentacled creature who destroyed most of the moon and threatens to do the same to Earth within a year. The Japanese government offers ten billion yen to whichever student can kill the creature — dubbed Koro-sensei — but his Mach-20 speed and regenerating body make every assassination attempt a lesson in itself. Between regular classes and daily kill missions, Nagisa begins cataloging Koro-sensei's weaknesses, hoping to find the opening none of his classmates can.