Assassination Classroom

A yellow creature destroys part of the Moon, promises to erase Earth next year, and then takes a job teaching Class 3 E at Kunugigaoka. Governments fail to kill him, so the students get anti Koro weapons and a ten billion yen bounty if they succeed. Nagisa watches and writes, Karma tests the rules, Karasuma drills the class, and Irina arrives as an assassin posing as an English teacher. Grades rise because Koro sensei actually teaches, and the kids start to believe they can choose their futures while still aiming at his heart. A Kyoto trip turns dangerous when delinquents kidnap classmates, yet a meticulous guidebook and a hired sniper plot both fail to stop him. An abusive P E teacher named Takaoka bullies the room until Nagisa disarms him, and he later returns as the island arc mastermind. A pro killer trains the class for the summer mission. A designer virus hits, Koro sensei shields his students, and Nagisa finishes the rooftop duel. The year goes on. The target is still their teacher.