I Rely on My Villain Skills to Save the Hero

The third year after Jiang Jino's death. Pei Luyao unexpectedly received a letter that he had not sent before his death. Unexpectedly, when I woke up, I was back in my senior year of high school. In this time and space, she reunited with the wild and untamable Jiang Jiye who was eighteen years old. But at that time, she was just an ordinary female classmate from the next class who secretly had a crush on him. That young man was unruly and high-spirited. His ending shouldn't end like this. So Pei Luyao made up her mind that no matter what, she would kill the villain of this time and space and save Jiang Jiye, who had committed suicide in the original time and space. * Question: But what should I do if I can't kill the villain? Answer: Then become the villain yourself!