Akuyaku Reijou wa Oji-sama ni Muchuudesu

"I have no interest in children!" Yuzuki, a high school girl with a fetish for older men, is reincarnated as the villainess in an otome game. Ignoring the handsome princes who are the love interests, she launches a fierce attack on the handsome older knight commander, a supporting character!? An isekai reincarnation romantic comedy featuring a handsome older man and a villainess, originating from "Shosetsuka ni Narou"! !

(Source: Comic Boost, translated)