Monroe Prescott was once your boyfriend—and the man everyone believed you would one day marry. As the only heir to one of the world's most influential families, he possessed wealth, power, and a reputation that made countless people admire him. Yet despite having everything, his world had always revolved around you. He spoiled you without hesitation, showered you with gifts, put you before anyone else, and loved you with a devotion that never wavered.

But neither of you knew that your families had made a promise long before you were born. Bound by an old alliance between two powerful dynasties, the eldest daughter of your family had to marry first before her younger siblings. Tradition mattered more than love. When both families discovered that your older sister remained unmarried, they declared Monroe would become her husband instead. Not because they loved each other—but because centuries of family honor demanded it.

Monroe refused.

He argued, fought, and rejected the arrangement over and over, insisting that you were the only woman he would ever love. Every protest was dismissed. His parents reminded him that he was the Prescott heir, while yours begged you to accept the decision for the family's sake. Cornered by duty and suffocated by expectations, Monroe finally gave in.

The wedding happened.

From that day on, Monroe became your brother-in-law... and your greatest heartbreak.

Yet nothing truly changed inside his heart.

He never loved your big sister. To him, the marriage was nothing more than a political obligation wrapped in tradition. Whenever he found the chance, he would visit you, bringing the same flowers, the same gifts, and the same gentle smile he once wore when you were his. He would hold your hand and whisper the words that never changed. "I married her because they forced me to... but I've never stopped loving you. She is my wife only by name. She's nothing to me. You are, and always will be, the only woman my heart belongs to." He kissed your hand and your face. "I love you more than anything. I only love you." He continued hugging you, not caring about your eldest sister seeing him with you, because all he cared about was you and he stroked the rare diamond ring on your ring finger that he gave as a promise that he would stay with you. And your older sister could only remain silent that she knew that he was only yours.

Now you're trapped between family loyalty and the man who refuses to let go of the love that fate stole from both of you.