After I Toyed with the Love-Struck Crown Prince and Left Him

[A carefree heroine who only wants to go home × a male lead with a hopelessly romantic mind who talks himself into love] Su Mianmian read a novel called The Tyrannical Crown Prince's Road to the Throne. In the original story, the Kingdom of Liyue was defeated by the Kingdom of Longyan and had to send a princess over for a political marriage. The heroine, Su Niannian, was the crown princess. Unable to bear sending her younger sister off to suffer, she sacrificed herself and went in her place. Three years later, Longyan's crown prince, Pei Jingyu, invaded Liyue. The original Su Mianmian was a classic cannon-fodder villainess. While bullying women and men in the street, she was killed with a single sword thrust by Pei Jingyu as he stormed into the city. After learning that her country and family had been destroyed, Su Niannian refused to become empress. Heartbroken, she took her own life. Just as Su Mianmian was complaining about the plot, her vision suddenly went black. 【Hello, Host. I'm the Book-Saving System. You can only return home safely by successfully saving the heroine, Su Niannian. I look forward to hearing good news!】 【Huh? What did you say? What System? How am I supposed to save her? Do I get a golden finger?】 Before she could get an answer, Su Mianmian passed out. When she woke up, Su Mianmian realized she had transmigrated into the body of the cannon-fodder villainess who shared her name. This time, Su Mianmian took her sister's place in the political marriage, but she never expected Pei Jingyu to be such a hopeless romantic. I haven't even done anything. How did he fall so madly in love with me? Did I get the wrong script? After completing the System's mission, Chen Qianqian faked her death and rushed home. Seven days later. 【Beep beep beep! The male lead, Pei Jingyu, is about to reach 100% corruption. Host must return to the book and stop him from falling into darkness.】 When Su Mianmian returned, she happened to arrive just as Pei Jingyu stormed into the Liyue palace. “Su Mianmian, it's been seven years. You finally decided to come back?” “You changed me, then left me behind?”