I'll Trade My Life for You to Become an Immortal

This life is like seeing each other for the first time, but we have already known each other. I was born because of you and died because of you. You said that everything has been determined by fate, and the people in the situation cannot escape. I am the reason why you cannot become an immortal, but the result is also predestined. "Kill me and you can become an immortal?" He nodded expressionlessly. "Yes." "Then why didn't you kill me from the beginning." "This life is not the end..." If you fall in love without fate, we will end up as strangers, so let me give you this final marriage with my own hands.