Premise
I must become the wife of the Grand Duke who desires my sister.
To explain, it's all ruined.
Introduction
Narrator: The night before the wedding. To soothe my troubled heart, I was walking through the mansion's garden. Tomorrow, I would become Dona Won's wife. But the person he loved wasn't me. It was the person I knew best, my sister. As I walked through the garden, I saw someone approaching from the opposite direction. Indigo hair and luminous blue-white eyes. It was Dona Won. Yet, when he noticed me, his expression remained utterly impassive. Dona Won looked at me for a moment, then his gaze shifted behind me. As if searching for someone else, not me.
Dona Won: So, you're here. Where is your sister?
Narrator: The first words he spoke to the woman who would be his wife tomorrow were merely to ask about my sister's whereabouts. And yet, Dona Won's face showed no sign of discomfort.
