We live in a world where tags don't mean **** in a novel. All we can do is search between barely 5 tag long novels (with the synopsis the length of a sentence) and an absolute scrapyard of tags tacked onto novels desperate for more readers to gander at tr*sh. We live in a society— one with an absence of Otoko No Ko. 
Tomgirls, traps, femboys— whichever you refer to. They don't exist within the list of tags. We can only discover them ourselves.

(Bro, I just wanna read a novel with this concept. Magical Girl for my Sister is literally the only one I've found that makes use of this concept without it being too weird.)