"One year, Ava. You play the perfect, doting Mrs. Sterling. In return, your mother's medical bills are paid in full." Ava Chen was just an invisible corporate intern on Floor 3, desperately drowning in her mother’s terminal illness bills and a looming eviction notice. Ethan Sterling was the ruthless, stone-cold billionaire CEO of the Sterling Group, holding a kingdom at his feet but desperate to secure his inheritance through a sudden marriage clause. It was supposed to be a flawless, ironclad business transaction. Thirty pages of legal documents. Separate bedrooms. Strict boundaries. Absolutely no romantic obligations. But when forced public displays of affection blur the lines, and a dark shadow from Ethan’s past threatens to tear them apart, the icy walls around the billionaire's heart begin to crumble. Can an invisible girl survive a dangerous contract with a man who doesn't believe in love? Or will a hidden pregnancy and a sudden disappearance change their fates forever? A passionate, fast-paced billionaire flash-marriage romance featuring a strong heroine, forced proximity, and a heartbreaking secret baby twist!