Does anyone know the source of this? I tried to reverse image search and just got a whole bunch of nope
http://www.pixiv.net/member.php?id=180196
6th page of his overall works, second picture.
Next time, go on sites like e621, rule34 paheal, gelbooru, etc. Wherever you might find it, and put in the character name(s) of characters you know in the picture. I found it on rule34 and it had the source link from there.