Sister's Overly Flirtatious

After Mu Qianxun, formerly a vegetative patient, travels into a novel, she is assigned by the system to adopt the script's greatest villain, Pei Xiaoye. While this boy secretly coveted her for a long time, Mu Qianxun dies unexpectedly just as her mission nears completion. Upon her death, Pei Xiaoye turns completely dark. After inheriting his family business, he destroys every person who ever harmed Mu Qianxun, causing the novel world to collapse. Meanwhile, having completed her mission and escaped the novel, Mu Qianxun finds the system returning to ask her to return to the story world to lower Pei Xiaoye's darkening value.