Help me remember

So, it’s about a guy who has an abundance of yang energy and he meets this noble who he does the deed with in the middle of nowhere. I don’t remember what happened (what I do remember is that the ml was gathering some men to find the mic) , but he has to dress as a woman and for some reason, he got pregnant. Also, it was like his life’s mission to not let the me know that he has a massive yang supply