I Took the Main Character’s Sister at the Start, Now the Heroine is Full of Regret?

Ning Bei transmigrates into a novel as the cannon-fodder villain who’s destined to be milked dry by the “Child of Destiny,” lose his family fortune, and die a dog’s death. Lucky for him, the moment he arrives, the “Revenge System” boots up and the plot derails spectacularly. The protagonist’s little sister goes berserk? Before the hero can rush in to save her, Ning Bei is already there, smirking: “Remember, you begged me for this.” Protagonist’s Sister: “Y-Yes, I begged you…” The two-faced fiancée wants to break off the engagement to threaten him? Ning Bei goes public at once: “You all heard her, she asked for it, and I accept.” The fiancée instantly panics. The Ning Bei who used t...