Death March kara Hajimaru Isekai Kyusoukyoku (WN) - Book 7 - 7-10. At the Canal's Bank.

Yu Linglong is the shu (born of a concubine) daughter in a general’s family. Since her mother was only a tribute dancer, her position is the lowest of the low. She used to live with her mother outside the father’s residence, and they only received some monthly money from him. He didn’t bother seeing them. But when her mother dies, she moves into the general’s residence.

The general is a very irresponsible and violent man. He doesn’t really get attached to women, just letting his lust dictate his actions. His wife is a jealous woman, who killed one of his previous concubines, because he doted on her too much. She similarly wants to get rid of Yu Linglong, in part to vent her frustrations over her husband’s cheating habits.

Because the sixth miss – the general’s legitimate daughter, was bitten by a snake, she needs detoxification. The cure was apparently getting poisoned by scorpions, to fight one poison with another. But since she’s already weak, they decided it would be better if she drank the blood of someone poisoned by scorpions instead. The general’s madam naturally decided to use Yu Linglong’s blood. During the process of getting bitten by the scorpion, the original timid Yu Linglong died of fright (and maybe poison? it’s never made clear). Then Yu Mei takes over her body.

Yu Mei is a modern woman. She was some mafia boss, so she’s very capable with fighting and overbearing attitude. She died because the man she fell in love with betrayed her and killed her. So she doesn’t trust easily afterward.

Since she took over Yu Linglong’s body, she refuses to adapt to the circumstances of a lowly illegitimate daughter, and uses her violence to fight for a peaceful life, where no one will challenge her and plot against her. Basically, she beats them up into submission. In the meantime, she acquires a tail – a very persistent prince, who only seems to stick to her harder, the colder she treats him. Did ancient men have such heavy tastes, she wonders.

- Description from Novelupdates

ZhouXiang didn’t know if God was giving him a second chance to live because he wanted to give him extra loving care or was it because he hasn’t messed with him enough.

I was a fool to believe that I, a mere red, could play God.A fool to think I could change the world, to balance evil with good.A fool to trust that those dearest to me would always remain by my side.In this world, where blood reigns supreme, a single misstep is all it takes to lose oneself.Ren, my dear little brother,I hope you still watch over me, even though I am unworthy.I’ll be with you soon—just wait a little longer.If you always want to stay up to date, find out when this book will be physically released, when the manhwa of Origins of Blood will come out, or see more content like novel art, then join my Discord server!