Assassination Classroom (2015)

Class 3-E faces an unusual challenge: eliminate their extraordinary teacher before they graduate. This peculiar educator has already obliterated the moon and threatens to annihilate Earth if he remains alive for another year. As they grapple with their daunting task, the misfit students must figure out how to defeat a tentacled being with Mach 20 speed, who also happens to be their most inspiring mentor. Balancing dark humor with heartfelt moments, this unique anime explores themes of growth, friendship, and the complexities of learning under extraordinary circumstances.