does somebody knows the author or the doujinshi?

Circle name: Kyoken Dinerz
Artist: Yonekura Kengo (artist of this page)
Guest Artists: Nanase Masato, Manami

http://rapidshare.com/files/92679558/red_ache.zip.html

0.o

Briefly, a full-package futanari is a person having a penis, testicles, and a vulva. This image is too heavily censored to be sure of testicles or vulva, so the tag must go (it does look to me that they both have penises, though). Check that wiki link I just gave you if you're confused.