Why Don't I Have a System?

(Single heroine + no Madonna + no matryoshka doll) "The Shenhao system is priced at one thumbs up." "Sword Immortal System, priced at three (dog heads)." Lu Ze didn't believe this in the previous life, which led to Ning Yuhan learning that the male protagonist had died long ago after reaching the top of the God Realm. After many hardships, she traveled back to save Lu Ze, only to find that there seemed to be something wrong with the system she purchased... "So you have been hiding here?" In a world where everyone has a system, there is no system of their own? The crisis didn't stop there. Lu Xuan, his brother who loved Lu Ze so much, actually took action against Lu Ze and issued an arrest warrant... "Did you encounter a fake seller?"