Source ^^?

If it's a Haruhi doujin, best chance of finding the source is to use Piespy's http://haruhidoujins.iqdb.org/ visual search tool.

According to it this is from [しるまりる] 涼宮ハルヒの○○
or [Silmaril] Suzumiya Haruhi no OO, and links to a couple sources to get it.