I recommend " I'm Always Reborn " to you. This is a sci-fi space-time travel novel written by the author, Wang Buyan. It tells the story of the protagonist constantly traveling through different time and space, changing his gender from time to time, and experiencing different lives. Although it doesn't completely meet the requirements of the title, there are also elements of male and female changes. It involves both fantasy and science fiction. I hope you will like this novel.