A student or an assassin?

Izumi Ryuka, an average girl studying at kunugigaoka.The only thing differenciates her from the other students, is that she comes from a family of assasins. Being an assassin along with a student she has to hide her identity.

But what will happen when she forgets all about class E. What will happen when her memory got twisted?
Will her pure-hearted devotion help her get her memories back?
Will she still help the E class with their assassination?
Or perhaps maybe she'll become a burden to the E class?

//I do not own anything except my oc and I did some plot twist