Looks like a guy to me. The general muscle build is different, not to mention the "private area" doesn't seem all too feminine, despite the slight ambiguity from the sketch-like style. I vote "genderswap"
Lime12121 said: I believe that the other images from this artist are labeled as futa on Pixiv.
Correct; this however, is not. Therefore I did not originally tag it such. I suppose people can decide themselves which option they like. I could see this picture as either.