Ok, so I've made some research and here's the result. It's a picture by Tohjoh Asami and it's either based on this manga http://www.mangago.me/read-manga/urimasu/ or just an illustration. I'm not 100% sure, but that's what I think.
I'm guessing it's this one http://www.mangago.me/read-manga/haginokouji_seiya_sama_no_ran/
I thought so too, but then I found this http://dx.blgl8.com/comic-i/blgl31217/
http://www.mangago.me/read-manga/dakishimetemo_okorimasenka/mf/v01/c000/1/