The protagonist's soul accidentally penetrated the body of Bai Linfeng, a young man in the courtyard, and unexpectedly gained a small world. He wanted to live a peaceful life, but he didn't expect that the more low-key he was, the more suppressed he was, and he was forced to fight back. There was no heroine or multiple heroines, and he had a dark belly.
It's a pretty good book, I'd say above average.