I Am Reborn and Go Back to 30 Days Before the End

I was reborn and returned to 30 days before the zombie outbreak. In my last life, I was pushed into a zombie group by my best friend just because the senior she had a crush on looked at me one more time. In this life, I told her with a smile: "Don't worry, you will meet your senior soon." Looking at her confused expression, I silently put away the prepared ropes and sacks.