The Eastern Depot Female Agent Transmigrates into a Book as a Villainess

After transmigrating into a book, a female special agent from the Eastern Depot becomes the story's biggest villain, standing in the way of the male and female leads' romance. To her dismay, she encounters the enemy from her mission in the book as well. The three of them dodge their pursuers while pretending to be wicked supporting characters, hoping to spend less time being hunted and threatened. But she fails to become a wicked supporting character, and the book's seemingly useless side characters turn out to be exceptionally clever. A member of the royal family with extraordinary powers of observation sees through them. With no other choice, the triplets marry into the royal family to escape their pursuers and become imperial consorts...