A Young Educated Youth Lays Low in a Period Novel with the System

[Transmigrate into a book + period piece + golden finger + slice of life] When Lu Xiaoman wakes up, she finds herself sitting on a train. Lu Xiaoman: Where am I??? Only later does she learn that she's transmigrated into a book, where she's the heroine's best friend and a stepping stone for her romance. Isn't that just a cannon-fodder role? Don't worry! With a System, she'll keep a low profile in the book and leave for good once the college entrance exams are reinstated! However, what Lu Xiaoman doesn't expect is that a few mishaps will force her to become anything but low-key. Lu Xiaoman: This isn't what she wanted! Stuck in an awkward position, Lu Xiaoman is forced to get caught up in the turmoil. So how will she get out of it? Wait, weren't we supposed to lie low and survive!!!