I Became a Witch, But My Sister is a Great Saint

(Transformed into a yandere/single, impossible to marry, main plot: cult building, farming, establishing power, and combat) (ps: the protagonist is purely evil and a scumbag woman in the early stages, including but not limited to PUA. Other female leads may be involved; please do not read if you dislike this.) Ren Xiaolu swore that he never imagined that one day, he would choose to become a witch because he wanted to escape his sister's clutches. Ren Xiaolu, male, 19 years old, a sunny and cheerful young man, was imprisoned in the basement of his house by his sister after she discovered his heretical identity, undergoing "corrective education." From that day on, Ren Xiaolu completely understood the true meaning of the term "yandere." His sister is a demon in the guise of a saint. By completely changing his appearance and even his gender, Ren Xiaolu finally temporarily escaped his sister's clutches and began a fulfilling and easy second life—or so it should be. But with the binding of the "Heretical System," the approaching survival crisis, and his sister hiding somewhere, all the small joys Ren Xiaolu sees before him are like a dream, about to shatter in the next moment. To protect everything before him, he puts on a short skirt and becomes a natural disaster…