How To Tame The Merciless Villain

i transmigrated into the novel called “the treacherous sorcerer” as a supporting character who's destined to be killed by kian, the main villain of the story. according to the original plot, kian ends up slaughtering every single noble in the empire-including me-so i must do everything in my power to stop him and save myself from an untimely death. kian has survived a harsh and painful past, so i will spoil him and take good care of him so that he won't turn out to be the vicious supervillain! but what have i gotten myself into? after i rescued kian from the slave market… he's suddenly obsessed with me! will i be able to protect kian and myself from a disastrous fate?