Responses
I'm sure it's just an illustration and not a manga love bug
It actually is a manga. On a different manga they have this photo on there was a link in the comments. I don't have the link but I know it isn't scanlated yet. Try Tineye.com and reverse search it. Or check out DP, they use to have a file with all these photos and the file names had the artist's names.
http://iweb6.mangapicgallery.com/r/newpiclink/waraibanashi_no_you_da/2/f251b16d33c403d43ebef9a061ef9acb.jpeg