Transmigrate as a Foolish Husband, Blessed by Foolish Luck

Overnight, she transmigrates from an ordinary office worker into a little girl. A country girl, she is made to marry in place of her sister, to a rich but useless fool. The battles within the family never stop, with one scheme after another. She fights her way through a blood-soaked path, only to find that light awaits beyond the darkest hour. When her true identity is finally revealed, her foolish husband is stunned. How can my sweet, delicate wife be so formidable?!