Rebirth at the End of the World: Miss Frivolous

Her biological father sold her to the base as an experimental product, her "kind" stepmother cooked a table of "delicious dishes", the man she had loved for ten years refused to waste a single shot of anesthetic on her, and her doted-on princess sister stitched her wounds "meticulously"... In the last ten years, all her sincerity has been fed to the dog. It's just that she, Ji Kexin, doesn't recognize people well and thinks a thief is her father. After burning with hatred, she returned to the month before the end of the world. This time, she came not only for revenge, but also for protection. Upgrade to fight monsters, slap in the face and abuse the scum, join forces... PS: The male and female protagonists are both strong, and the story is cool.