Guess I Died, Let's Try Again

I read and watch a lot of Isekai and wanted to try my hand at it. Nothing too far out there, high school student dies after a gunshot wound and finds himself a victim of fate. After telling him that, an angel offers him retribution, a chance to live again. They take the offer, but things get off to a pretty bad start. Born a cat girl in a violent world, they are gonna have to scratch, claw, and bite just to survive.