It started out so promising. The goal was to live a life with the NPC character. Then the psycho prince realized she wasn't a sycophant. Cue the I'll make you mine no matter what plot: rape, mind-break, love bombing and good old blackmail. Honestly girl just kill him when you get the chance.
JK's Tragic Isekai Reincarnation as the Villainess ~But My Precious Side Character!