Fantasy romance

Intro anime is in the night at the Duke mansion, I'm not going to put any further detail, but I am going to put in this Aristasia is a noble lady of the Verdick family who is loved by the cold blooded Duke and the sword master long after her Debutante she didn't have a significant lover she was curious about "it" and her body became heated and while she avoided her brothers eyes she waited for a Gigolo and her brother evan Came "i See Aris you were curious about what you would do with a Gigolo and I don't like that a Gigolo will come so wouldn't they do it if I your brother told you" after that night, her brother's view of Aristasia changed and there's also her younger brother Leon, Evan and Leon's found out that she only want that and nothing else, and she was just using them to get pleasure, and then they dropped her butt they didn't know until today