, I can recommend the following forbidden novels for older sister and younger brother CEOs to you: 1. " Goddess CEO, please have some self-respect. I treat you as my sister." The male protagonist met the goddess CEO after breaking up. He chose to refuse to confess and became a " gigolo." 2. " My Seven Beautiful Sisters ": The male protagonist accidentally discovers that he might be the younger brother of a beautiful woman, triggering a series of stories. 3. "Good girl! After the male protagonist was cheated on by his first love boyfriend, he met his childhood sweetheart sister, but the sister only treated him as a younger brother. 4. [God of War Retreats: The Seven Sisters are Gorgeous and Alluring]: The male protagonist met seven sisters and faced the oppression of the seven sisters. 5. [My Sister is the National Goddess]: The male lead is a good-for-nothing, but after receiving the male god's nurturing system, he began to rise. I hope you like my recommendation.😗