>>2348793I can tell you that the two pictures on the left side, second row to the very bottom look a lot like twitter and pixiv artist 71. It very much resembles his great art style and a very large section of his works is k-on related, especially mugi. You may have to search deep to find that exact one with all his mugi pieces and comics but I'm sure you will eventually. Not sure if this helped or you already knew this and it is not him but its all I can really do.
http://www.pixiv.net/member_illust.php?id=1143280&type=allhttp://www.zerochan.net/71+%28Artist%29?p=1https://twitter.com/71drafting 