... what.

It's hard to tell where that cock is coming from. Especially because her clothes don't show any outline and seem like they lay tightly on her body.

Possibly she is a futanari with a long dick and you cannot see the outline because her skirt and jacket are puffed out?

1. Position.
2. Facial expression.
3. The back of the penis is show, not the head.

So I have come to the conclusion that this is self-suck futanari.

P.S. I want more from this artist if anyone can find out cause this is awesome!