Assassination Classroom Second Season

Assassination Classroom Season 2. - In Class 3-E at Kunugigaoka Middle School, there's a strange custom: all the students wish their teacher good morning by trying to put a bullet in his forehead. But we're not talking about just any teacher, but a truly strange individual, a cross between an alien and an octopus, and capable of moving at the speed of a Mech-20. Will it be discovered that this "teacher" was responsible for the destruction of the moon, of which only a segment remains, as well as the one who announced the end of the world in a year? But now he's just a teacher in a normal school, teaching a somewhat unusual subject? ASSASSINATION!!!