Assassins Betrayal (Karma x reader) (Assassin Classroom X Black Butler)

There are lots of anime qoutes and maybe pick up lines see if you can find them.
Raven a true born assassin became friends with 'Koro-sensei' a long time ago and was trained in the ways of an assassin. When finding out what He had been planning to do she rushes to go and help finding out that the only way to stop was to kill him.
Along the journey in class-E she meets Karma and we'll, things happen.

A story about a girl assassin with a twist to it.