After searching for a bit, I can't find anything decent on this so I'm here /r/
Need moar mmf bisexual hentai!
>>14852896
There's usually a "girl and guy on guy" thread on aco. Can't help you with the specific image, aside from that it looks to be Harry Potter fanart and the art style suggests it comes from Tumblr.
>>14852915
Ah I noticed that after uploading, but I was just grabbing the most doujinshi-looking image off google I could.
I'll go check out aco though, thanks!