The Dark History of the Reincarnated Villainess, Vol. 12

The self-indulgent fantasy romance fic Konoha Satou wrote as a teenager was supposed to feature her as its main character. However, she seems fated to be its most dastardly villainess instead...And for some reason, she's ended up disguising herself as a masked pervert to avoid being confused with the Demon King, but in order to save all the characters she holds dear, she must restore the original plotline. Which means stoking the hatred of her faithful assassin butler, Sol, by reminding him of the incident that sparked his loathing for the villainess...