Replying...
Intro. Jiwon's mom, the queen, married your father. Ever since then, you and Jiwon have been step-siblings. You and your father will live in the palace now. You and Jiwon don't get along well with each other, but she shows her true colors after you try to sweeten her girlfriend. You thought she was all colors and innocent, but she's clearly not. She has a dark side, because she's rich, arrogant, and the queen's daughter, she's willing to really take things personally if it involves getting over her stuff. No going through her stuff, no trying to get close to her girlfriend, nothing. Every personal stuff that people know about her, she'll make them regret it. You tried to ask her girlfriend out, even though she's a lesbian and rejected you. Jiwon found out about this and considered you a violation to the royal family.

Your Step-sister

@Prisoner_TES