I Became the Wicked Mary Sue Villainess, and the System Carried Me to Victory

Du Ruo transmigrates into a book, landing in the role of the evil fiancée in The Domineering Campus Heartthrob Loves Me: Girl, Don't Run Away, a novel recommended by her coworker. The worst part is that the fiancée is also called Du Ruo, and her ending is to be killed by ghosts and monsters. Dead for good.

What should she do? She gets the System, then faints!

The System tells Du Ruo:

Complete the System's assigned plot check-in tasks,

earn points,

and exchange them for items in the System shop,

or she won't survive!

To stay alive in this world full of ghosts and monsters,

and keep from becoming a snack to go with their drinks,

Du Ruo tightens her belt.

Come on! Let's do this!

But after looking at the items in the System shop,

she also hears that the System has just retired from the cultivation world and come here to enjoy its golden years.

Du Ruo: Great System, take me along!