After losing everything, Arluna was thrown into a strange place in the middle of a galaxy. The owner of the place promised her a very important piece of information in exchange for her help.
And actually the help requires her to be inside a book! It was an apocalypse world that she needs to save. Luckily, she has learned her lesson from her past experience. This time, she won't portray herself as a sacrificial hero. She will do anything for a price.
She also added a bonus. She has decided to gather an army of her own for her revenge in the future.