Prologue

7 years has passed and Nagisa becomes a teacher and an underground hero called Blue until he receives an email asking him to teach at UA high

I do not own assassination classroom of course
I do not own to artworks
I do own this horrible fanfic
Warning :
A) This is my 1st fanfic so idk how to do it
B) English is not my first language and I'm bad at grammar
C) pairings may to added later