I Want to Fall in Love with the Instructor

Bai Jingjun found that he had traveled back in time to a mindless Mary Sue novel that he had previously pursued. She was also the vicious female supporting character who ended up with her family ruined and being manipulated by the heroine, unable to survive or die. In order to avoid such a tragic ending, she tried every means to create a butterfly effect. However, in the end, the result of the butterfly effect was that the heroine put the knife across her neck and smiled brightly, "Instructor, do you want to marry me?" "······"