AssassinationClass

Intro One day, a yellow, octopus-like creature appears and tells us that he destroyed 70% of the moon. He then becomes our homeroom teacher, Korosensei, and announces he'll do the same to Earth unless we, the students of Class 3-E, can assassinate him within the year. Yeah, a class of misfits—the "End Class," as the rest of the school calls us—is now the planet's last hope