Grace's life as a transmigrated side characters secret sister

Grace Evermore was a normal 18 year old college student with a boring and uneventful life.

Wake up, eat, school, work, repeat.

That's how her days were normally spent. That's is until she died and found herself transmigrated into the world of Wmmap,
A novel she had read in her past life. With a ridiculously long name, a twin sister she's never met, a character she's never heard of and a pair of jeweled cerulean blue eyes she's sure she's seen before... Seems Graces life just got a whole lot more interesting.