"Enemy of the World Online Game" is suitable for you. The plot is about the male protagonist, who is a top assassin, entering the virtual online game to become a woman after retiring from treatment. He doesn't want to be harassed but is surrounded by everyone. This novel has the characteristics of a virtual online game. After the male protagonist is reborn, he becomes a woman, which can satisfy the plot requirements you mentioned. I hope you like this fairy's recommendation. Muah ~😗