Reborn as the Little Troublemaker of a Sickly Villain

[Preorder: Please add my new novel, My Goofy Master Worries Every Day That I'll Die, to your reading list. Mwah~] Chi Yu transmigrated. She became the only daughter of the once-glorious Lord of Baicheng, the male lead's discarded wife, and a scheming little troublemaker with a delicate constitution who might faint after just three steps. Her notorious past included poisoning the heroine, assassinating the villain's beloved, and humiliating the sickly, obsessive villainous overlord with a disability. With a start like this on hell mode, the first quest her System issued was: Save the world. Chi Yu solemnly declared, "It seems my destiny is to be a hero who saves the world. The road ahead is long, but I shall seek far and wide!" A little over ten minutes after making her vow, the villainous overlord crushed her skull. Chi Yu: "???" Are you doing this on purpose? Is there any point in playing a dungeon this hard? Is this garbage System seriously thinking with its ass? "I'm dead. The story's over. Roll the credits." System: "No. You can revive infinitely until you complete the quest to save the world." Half a month later. Chi Yu ran into the villainous overlord again and was stabbed through the chest with his sword. Two months later. The villainous overlord held her in his arms and used her as a human shield. Chi Yu: "...Let me tell you exactly what I think of you." Five years later. After enduring humiliation and persevering despite her injuries, Chi Yu successfully revived the tragic romance between the original hero and heroine, rekindled their determination, helped them suppress the villainous overlord, and saved the world. With the deed done, she left without a trace, quietly vanishing into the crowd and conveniently "dying" in the great battle. But when she "died," the whole story went off the rails. The overlord went berserk and slaughtered everyone under heaven. System: "...We don't know what went wrong either. Shall we try again?" Chi Yu: "@#￥ System, your mother is dead." P.S. Don't be put off by the brutal blurb. This is a one-on-one romance, with a mostly sweet and doting relationship and a fun, satisfying, goofy plot. (The heroine does suffer physically due to special circumstances.) The hero has no past love. In the first life, he only cared about making trouble; in the second, he only has eyes for Chi Yu. Theme: A girl raised under the red flag will eventually set out to save the world.