I Transmigrated into a Book, and I’m Done Being the Villainess

Transmigrated into a book? And into the body of the wicked supporting heroine, no less? Now they want her to make a comeback? Can't she just coast through life? The System says: No! As a wicked supporting heroine who wouldn't survive past the first episode, she has to make it safely and in one piece all the way to the finale. Her ultimate goal is simply to stay alive. But one day, when the male lead stops her, she throws up her hands. “Come on, I'm just a supporting character, a supporting character!” The male lead: “But you can do the things the heroine can do. Like... we could make buns together.” Her: “...”