Flash Marriage to a Secret Billionaire: My Doting Husband's True Identity

She thought she married an ordinary man for convenience, but her new husband hands her a bank card with an unimaginable balance. "Keep track of your spending—I just want to know where the money goes," he says casually, as if unlimited funds are nothing. As he showers her with affection and luxury, she begins to suspect her humble husband isn't who he claims to be. Who is this mysterious man she married in a flash, and why does he treat her like the most precious treasure in the world?