After Transmigrating into a Book, I Refuse to Be Cannon Fodder

[Transmigrate into a book + reborn + power couple + devoted to each other + both pure]

Shen Yu, an ability user from the apocalypse, transmigrates into a book as a cannon-fodder villain. Through a twist of fate, he becomes entangled with Chu Xinghe, the darkened male lead from the comic. Amid misunderstandings on both sides, Shen Yu gradually realizes that Chu Xinghe, who seems so cold and indifferent, may not actually dislike him.

P.S. An unconventional cultivation-leveling story with a large ensemble cast. Contains potentially troubling elements, so read with caution!