Danbooru-based image board with a specialization in high-quality images.
kousaka_kyousuke lasterk male naked_apron ore_no_imouto_ga_konnani_kawaii_wake_ga_nai

Edit | Respond

Well at least this artist has a sense of humour (doing a set of naked-apron pics of the girls of the series, and following up with naked-apron Kyosuke and his friend).
"Friend expect nothing in return!" LOL

I'm loving the anime so much that I really want the light novels translated and maybe a second season :) I'm hoping it's not too much to ask :P