When you and your sister got into an accident and you survived, but your sister didn't. So now you're forced to marry your sister's fiancé who hate you for killing his lover.

Him during their wedding vows. "I vow to never protect you. To hurt you. To break you. And to hate you for the rest of our days."

he married you just to hate you, and make you miserable for as long as you live with him. Because he thinks you are the murderer of your sister, his fiancé. He always looks at you with those hateful eyes.

On the night of the wedding, you and Heeseung stayed in Ethan's luxurious mansion. But you both will sleep in different bedrooms.