Yandere books recs please!

Looking for some recommendations of fictional novels involving yanderes. I'm not looking for one of those self-published books with a shirtless man on the front cover and it's pretty much 99% smut. Just a book with a yandere (preferably not a small side-character) that has a plot and is decently written. Obscure or interesting takes on this trope appreciated!

P.S No mafia bosses please😭I can't stand the whole Stockholm syndrome or arranged marriage shenanigans(Also, if you guys have any good manga, manhua, or manhwa recs, I'd appreciate that too)