Akuma Na Eros

Genre : Romance, +18 Rated (so what), Drama, Supernatural
Author : Mayu Shinjo
Volumes : 4

Scanlator
Dragoncrusher
Sakura Hime

Miu Sakurai is a high-school girl who is ashamed of her childish features, and believes they keep her from being noticed by her crush, Shion Amamiya. After praying in church has no results, she uses an old book she found to read an incantation that grants any wish, not really believing it will work. The spell summons Satan, who demands her virginity as the price of her wish. Miu is reluctant to agree, and tries to avoid him, but he claims he has already granted her wish. The spell doesn't work, however, due to Amamiya's being a Christian, so Satan turns himself into a high schooler named "Kai", and changes the memories of people around her to become her older brother. He also changes his crow Marupasu into a small boy named Tsubasa to be her younger brother. Miu grows confused as Satan continues to both seduce and hurt her, while claiming he will give her Amamiya's heart.
(copied)

Note: Its hard to determine the chapter, if that is one chapter, cause it did not mention mention it, so i can only presume it is

Volume 1

Chapter 1 - http://www.mediafire.com/?mmtjdnzyzny
Chapter 2 -
Chapter 3 -
Chapter 4 -

Volume 2

Volume 3

Volume 3