Cain Said She Was Going to Be the Savior

Once upon a time, there was a glorious country on the earth. That is an extraordinary kingdom. There, there is a strict hierarchy. Human beings are the lowest form of life, not even as good as animals. Led by the "angels" as the apex, many other extraordinary species regard humans as lowly slaves. Human beings and the extraordinary are incompatible with each other, and this has been doomed since birth—— ——Blood feud. Ps: The female protagonist, no clear cp, no ambiguity, revenge flow. This book is also called "First Blood".