After Giving Up, the System Sent Me to Ancient Times to Sell Spirit Cards

[Transmigrate into a book + cannon fodder + System + pampered by everyone + powerful characters + play the pig to eat the tiger]

Shen Liyue accidentally binds herself to a Spirit Card System 999. She signs in and draws cards every day, accumulating more and more spirit cards, but slacks off and never sells a single one.

In a fit of anger, Spirit Card System 999 sends Shen Liyue to ancient times, where she transmigrates into a book as a cannon-fodder character. To survive, Shen Liyue has no choice but to start selling spirit cards and gets to know the book's unhinged male lead.

Shen Liyue is a cannon-fodder character in the book. Through constant hard work, she gradually grows stronger, takes down the heroine, and rises to become the unhinged male lead's one true love. She finds love and becomes a true winner in life.