I Reincarnated as a Chubby Villainess, but for Some Reason, the Last Boss Prince is Obsessed with Me

After dying, I was reincarnated as Celine, the selfish and overweight villainess duchess and older sister of the heroine in a popular novel. If things continue as they are, I will be killed by the hero prince, just like in the novel, and meet a miserable end. I vow to reform with all my might and begin to struggle, but before I know it, I'm caught up in unexpected doting and obsession...! Will Celine...