"trap" maybe?
I say trap, because I can't see if he/she has breast or not (flat chest lol), that's why I think it's not genderswap.

But should it be disabled? I mean he's a guy, and he's only dressed with female clothes, like Len in Imitation Black.
Well, I don't know, maybe I'm wrong.

I'll begin by saying that safe/gel/danbooru and shuu have different policies on traps, and rarely will you be able to say, "this is tagged as a trap here, so it should be this way on shuu as well".

Anyway, for the image itself, he kind of seems to have boobs? So I guess it would be a genderswap.
But I'm not entirely certain if he does or not, so we can review it.