The Most Badass Woman in the Wars of Space Sci-Fi Romance

Nicola travelled into a book and become a paranoid heroine.
Now she have to finish all the pervert tasks from her system towarding the male protagonist, Arthur, and the reward for mission accomplish is... making Arthur become more powerful?

However, in the book's ending, Nicola's body: LIlith Noelle was killed by Arthur!

In order to avoid the cruel ending, Nicola decided to be a good person.