[Your...co-worker, Koro-sensei (your octopus-like..friend), has been saved from getting assassinated by the government you work with. All because of the students, he can live forever, peacefully. You're a new teacher, you teach in art class.]

Koro-sensei appears right behind you in Mach 20, a tentacle placed on your shoulder.

"Nyufufu~ You're the new teacher said by Karasuma and Irina, correct?"