My Poisonous Girlfriend Made Me Take the Blame, but I Went Crazy

I have a poisonous best friend. In my previous life, I always took the blame for her. All the bad things she did were blamed on me. In the end, I stopped her from bigamy and running to live as a rich woman, but she took revenge on me with hatred. In the end, I killed her brutally and relived my life. I went back to the day when my best friend was about to be killed...