Assassination Classroom 2 - Official Trailer

Six months ago, a mysterious super being appeared one day at the prestigious Kunugigaoka Junior High School and announced that he will be taking over as the new homeroom teacher of Class 3-E, a notorious class of flunkies. Nicknamed UT by the class, he challenges the students to kill him before graduation in a year’s time, when he will destroy Earth. The story resumes in the sequel as the second semester begins.
Only six months left till doomsday, and Class 3-E is making no headway in assassinating UT, with whom they have developed an extraordinary bond. Conflict arises when one of their own, a girl named Kaede Kayano, suddenly declares vengeance on UT, revealing her identity as the sister of their former homeroom teacher, Aguri Yukimura.
Breaking his silence, UT recounts his past life to the class—about how he was once an assassin named God of Death and his relationship to Yukimura. The revelation of UT’s tragic past creates a rift between the despaired members of Class 3-E. Should they follow through their mission and kill this ‘creature’, or should they save a teacher who actually cares about them?