The Villainess is my fiance: But she is gentle towards me

On my deathbed, I finished a novel titled The Order of Love. But when I opened my eyes again— “What the fuck?” I had been transmigrated into my own story. Not as the hero, not even as the villain… but as Vivian D. Zenithara—the heir doomed to die at twenty three, whose death sparks the rise of the feared villainess. I barely escaped death once, and now I’m fated to face it again. Only this time, I have a system. And her. The villainess. My fiancée. In my novel she was cold, ruthless, feared by all… but in reality, she’s gentle and kind—at least toward me. With my life ticking away, can I defy the story I once wrote, protect myself, and uncover who she truly is? Or will fate claim me again before I can change a single page?