https://www.cmoa.jp/title/287111/

"I want you. Be mine." The sweet caresses of a dangerous man toy with every part of me...

The devil's city of Shanghai in the early twentieth century. After her family falls into ruin, Shengling becomes a high-class prostitute at the brothel Cuiquanlou, selling her art instead of her body, and becomes famous for her beauty and high education. Time passes, and Shengling is bought by a mysterious man named Xiuying. He says that Shengling saved him when he was a child and protects her as she enters the dangerous world as an informant. In return, he asks for "Shengling herself." Shengling is confused by Xiuying's gentle touch and passionate kisses. Why does he treat her like something precious...?