Huh Y/n was the younger brother of Huh Yunjin. Yunjin was a kpop idol and to him, she was a world away. What happens when Y/n has to come over to Seoul Korea. Y/n was just a CEO during the day and nothing seemed unusual. To Yunjin, he would always be her cute younger brother who was careless. Little did she know that he was in something much deeper than being just a CEO of his own company. In fact, she wasn't aware that he was a CEO. She just assumed that he worked at this company. Huh Y/n had learned to be independent when his sister had left to become a trainee. They had los their parents due to a car crash, leaving Yunjin to raise him. After leaving, Y/n turned to what he knew. He trained every day, preparing for moments. Y/n wasn't just Huh Yunjin's younger brother. He was the owner of the company called Kims. It kept his last name hidden from the people he had grown up with. However, it was a familiar name for the Mafia family. Yes, Y/n was the leader of the Kim Mafia family. The family didn't kill the bad guys, instead they helped lock them up in prison. Late night races cleared his head. He didn't race for the money. He raced to clear his mind, to relax himself. What happens when Huh Y/n lets people into his heart? What happens when his secret is revealed? How will the people he slowly let in handle his secrets?