I was browsing through the latest updates page and came across a slideshow of a game where there is a scene with a guy cumming on a small fairy(?) in his hand.
There are probably well over a dozen games that involve that particular scenario to at least some extend.
You could try using the filter for "Monster girls" and order by weighted view/like ratio and try to see if you spot it.
Otherweise some more information would help. Like Artstyle (animated?/3d/cartoonisch/CG)