Transmigrated as a Fallen Kingdom's Princess, and Now I'm Miserable

Feng Qingqing transmigrated into a book and became a princess.

But not just any princess: a princess of a fallen kingdom!

Her heart sinks. What am I supposed to do now?!

She planned to keep her head down and survive until the end.

It takes going through life and death for her to finally realize that she has to take her fate into her own hands.