After the their Graduation and the whole assassination, Class E went to their separate ways focusing on their future. Kayano continued her career as an actress and Nagisa continued on being an assassin, the two who had promise to always be friends. When Koro-sensei invites all the original Class E for a reunion and they see each other again, Does Kayano still have Romantic feelings for Nagisa?! And Will Nagisa finally realize Kayano’s feelings?!
In my fan fiction Koro-sensei is still alive but he is in his human form