[Shirataki Shun(しらたき春)] Kyoudai (兄妹)[Comic Shingeki (真激) - Vol.59][2008-08]
http://www.megaupload.com/?d=DE9WEBAU
Double post, to separate, I can only remember another author right now, not mentioned.
I was surprised this author doesn't have a non-hentai manga, the artwork looks familiar to another I can't place, the scene even finishes with no intercourse which rarely happens on a hentai magazine. Still waiting for something I can really post.