After a bit of time looking it up, I'm pretty sure OP's pic is from loli hentai, although I haven't read it so I'm not sure.
If my research is right, the artist has a pixiv right here: https://www.pixiv.net/member.php?id=1183648
Can confirm, from loli hentai.
that one's especially beautiful, thanks for posting it. It's a shame it seems like the artist left the internet