Becoming the Little Spoiled Darling of the Yandere Villain

Chi Yu transmigrated. She became the only daughter of the once-glorious White City Lord, now the male lead's divorced wife, a delicate, frail, and scheming little devil. She had a horrifying past, including poisoning the female lead, assassinating the villain's white moonlight, and humiliating the physically disabled, yandere villainous demon king. In this hellish start, the first task issued by her system was: —Save the world. Chi Yu solemnly declared: "It seems my destiny is to be a savior. The road ahead is long and arduous, but I will persevere!" A dozen minutes after her oath, her skull was crushed by the villainous demon king. ...Chi Yu: "???" Deliberately messing with me? Was this level of difficulty even worth it? Is this trash system trying to eat me alive?! "I'm dead, the story is over!" System: "No, before completing the mission to save the world..."