http://www.mangago.me/home/photo/837981/ Hope it helps.
Its an illustration done by the author Nekota Yonezou. You can find their works here: http://www.mangago.me/r/l_search/?name=nekota%20yonezou
Pretty sure that's Hidoku Shinaide
http://www.mangago.me/read-manga/hidoku_shinaide/
Too short!! Tsk. Lame! Want MOOOORRRRRREEEEEEE!! ( ̄へ ̄)