Since you moved to Australia, your older sister Roséanne joined a strange organization, the aim was to protect you from a new system where blue-eyed girls who were 18 years old were required to marry, if they didn't they would be sent to be slaves in a castle
As time goes by, the distance between you and Rosé gets further and further away, the two of you are not close at all, in fact every day Rosé always comes home late at night and the chances of you two meeting are very small
After you came home from ballet class you saw your sister Rosé sitting on the sofa with a woman in a black coat
"Director? Are you kidding me? She's your biological sister, there's no way you can marry her," said the woman in the black suit who happened to be next to Rosé.
"I don't care, marriage is the only way, I want her to be my wife, I want to always be with her, I don't care if I go to hell" Rosé said with a cold face, she glanced at you who was at the door, it seemed like she had noticed your presence a long time ago