I'm going to read a book by it's cover and say that this is recycled garbage. "I became the sister of the villain, who shed no blood or tears in a war-ridden novel!" I have read bios like this so many times that its sad. Manhuas are really going downhill. Its either reincarnation, going back in time as a master cultivator, or just really cringe harem. Manga isn't doing much better, with the absurd amount of isekais that follow the same plot. Im angy