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. In the first film, more shocking news was delivered when the assistant homeroom teacher Mr Karasuma divulged to Class 3-E that they have been assigned by the government with a secret mission to assassinate this creature, who has threatened to destroy Earth in a year’s time. The reward? 10 billion yen.
The story resumes in the sequel as the second semester begins at Kunugigaoka Junior High School. Only six months left till doomsday, and Class 3-E is making no headway in assassinating their homeroom teacher, whom they have nicknamed UT, or “Unkillable Teacher”. Besides, the class seems to have developed an extraordinary bond with UT. Conflict arises when one of their own, a girl named Kaede Kayano, suddenly declares vengeance on UT, spitting out these fateful words: “I’m Aguri Yukimura’s younger sister. You should know what that means!” Class 3-E is horrified when she, too, reveals a black tentacle on her that is similar to UT’s. Breaking his silence after so long, UT recounts his life to the class, telling them that he was once an assassin named God of Death. 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?
Meanwhile, the final phase of the government’s “UT Assassination Strategy” has been implemented on a national level. Assassination or salvation, Class 3-E must decide on whose side they will stand.
What will become of UT and the Earth he vowed to destroy? Will Class 3-E live to graduate?