I don’t remember much, but I hope you can help me. I’m searching for a Manhwa where the female lead (FL) is reincarnated. She was a villainess in her first life and was actually from another world, I guess.
She is friends now with the male lead's sister; something happens at a ball and the FL wishes that the sister will dance with a flirty guy. (It is saying that the sister never dances and it shows that the flirting guy likes the sister).