After Obtaining the Concubine System, I Sold the Male Protagonist

I traveled into an ancient sadistic novel, where the male protagonist forced me to give my kidney to his Bai Yueguang in order to save his female counterpart, Bai Yueguang. He said, "If you are willing to give Su Cha a kidney, I will marry you." He thought I loved him badly, so naturally I would do anything for him. But what he didn't know was that I was bound to the direct lineage system. All those who go against my will will be sold by me personally.