I can see Yuu between them, but I have no idea if she's supposed to be genderbent in this picture or not.
This artist has a long history of drawing girls getting fucked by dark-skinned men, often in cosplay of female characters, including Yuu several times. And the middle person's fingers look larger than the girls' and male to me. I'm changing the tags to male accordingly. At the very least it should be 1other and not 3girls/yuri.