I'm looking for stories that are like "I played the role of the adopted daughter too well" or "The way to protect the heroine's older brother". They have things like "cruel FL" and "Dark" and "family relationships". I'd also like it if it was like western fantasy or isekai.
My go-to recommendation for a cruel FL and romance is Sinister Ex-Girlfriend, mc is a manipulative psycho who mentally torments her victims. It's a quick transmigration, with no true romance (maybe a female bromance at best) but each world has romance as a main theme
Maybe I Became Cinderella’s Vicious Stepsister I have not read it, but according to some reviews they say that she is somewhat villain and vicious
some manhwas: Untouchable Lady (Novel Here) Don’t Concern Yourself With That Book (Promo Manhwa Here, and also the novel is very good!) Even Though I’m the Villainess, I’ll Become the Heroine! Reminiscence Adonis (Also check out the novel the translation is very good and frequent)(Manhwa) I Tamed a Tyrant and Ran Away (Novel Here, Official English Manhwa Here) Angelic Lady Why She Lives as a Villainess The Villainess is a Marionette (Manhwa)(Official English Manhwa Here) Death Is The Only Ending For The Villainess (The official title is ‘Villains Are Destined To Die’ also check out the novel here it’s completed) Kill The Villainess (Novel Here) and novels: You’ve Got The Wrong House, Villain : I recommend this one especially! The protagonist is apathetic and cold and she’s so cool! The Baby Raising A Devil : very cold but cool child protagonist! Baby Tyrant : I guess this also counts because the protagonist is disappointed in humanity and doesn’t believe in family Two-Faced Princess Adonis (Novel)(This is the novel of Reminiscence Adonis) The Villainess is a Marionette (Novel) Don’t Concern Yourself With That Book : Somehow it counts because the protagonist pretends to be innocent pure klutz but she’s actually cold. Can We Become a Family? I love all of these and all the protagonists are just so cool Hope you like my recommendations
I Want to Be You Just For A Day (apologies, can't post links yet.) This one's also on Webtoon, as My Throne, I believe. There's a second, less important FL, but the real one is definitely cruel. But it's a manhwa, no novel that I'm aware of.