The Assassin Fiancee: Rewriting My Doomed Fate

I was the peerless assassin, Hua, a ghost whose perfect record ended only when I was imprisoned in a mundane world. Then, an avalanche hurled me into the very wuxia novel I'd just read. My new identity? Nan Hua, the cold, 'doomed' fiancée of the novel's hero, destined to die obstructing his true love. But I am no meek lady. My assassin instincts, honed over a lifetime of death, are sharper than ever. This isn't a novel; it's my battlefield, and 'doomed fate' is just another target. They think they can write my end? They'll never know how miserably they'll fall. The plot dictates the hero, Long Qian Xing, find his true love elsewhere. So why is he suddenly trying every possible way to win my heart, the 'villainess' he's supposed to abandon? What happens when the cannon fodder assassin decides to claim not just her survival, but the hero himself?