Trapped in my own novel as a nobody

This story is about a Girl that made her own web novel but instead of being a girl also she became a boy.
She is just a character that doesn't exist in her novel but still has a background that she doesn't know she tries to get in the way of the main story since the novel ends with a dark mage destroying the world and killing the sup and main characters also.

Enjoy the story where sword and magic are also modern technique is a thing she is still her self no other memories also her sexuality is still more for boys but also likes slitly girls