Transmigrated as the Cannon Fodder Prince's Fiancée

What happens when you end up inside a story where everyone competes to be the most beautiful, powerful, and tragic? No matter how earth-shattering the Host’s backstory is, she’s destined to be nothing more than a sacrificial extra! She thought she could breeze through the plot with her knowledge of the story, but the moment she opened her eyes, she was firmly pinned down by the strongest fighter around. Worse still, the person she’d selflessly saved twice, holding no grudges, was the very man she’d been waiting for as her destined match. Uh… No wonder he’s a man who needs saving! She said, “Everyone dies eventually, either by their own hand or someone else’s.” He said, “I’ll be with you through every trial and danger. I won’t let you die before I do!”