aheago face source please
maybe someone else can direct you to the exact comic, but the artist's name is Shindol and everything he does has those great ahaego faces. It might be the monogatori thing he did, but that's a lot of pages for me to thumb through to find that one face
go to gehentai and punch "artist:shindol$ eng" into the bar
ShindoL - TSF Monogatari.