"My Wife, Who Is Treated Like a 'Dog' by Her Husband, Is Somehow Happy"

Poor Noble Lady Rachel decided to marry Earl Ryan, who has a terrible reputation. She needed the money to give her young brother a proper education. On the day of their first meeting, her beautiful husband, living up to his notorious reputation as a "sadistic personality-disordered person," makes cruel remarks. ――"I will never love you." And "I intend to treat you like a dog."―― Rachel, having accepted these terms, agreed to this. Time passes... The brother, who was once small, studied earnestly thinking of his sister, saved money, and became independent. He finally goes to retrieve his sister. "I can finally take my sister back from that brute!" With such determination, he bursts into the couple's mansion, but wait――... Something is different from what I expected?? ☆A sister-complex brother earns a fortune through sheer determination and finally rescues his sister, about to achieve his long-awaited revenge... or so he thought, but...