Thank you to anonymous for making many of these uploads possible.

Awkward translation of the title: "Feminization ghost~ without passing on her virgin desire will have its wish granted by me when I get fucked!"

It's not really possession, but the first chapter had a dead girl who died without having a lover or sex, and she was always alone, so she decides to do something to his body. When he wakes up as a girl merely being touched by a guy makes him uncontrollably horny, and soon he needed to be fucked by his best friend everywhere. (They agreed to keep his change a secret.)

http://www.dlsite.com/books/work/=/product_id/BJ084180

I'm taking the artist's romanji from twitter.
https://twitter.com/rakuto_yuika

There is a sequel.
/g/981808/444d7e66bc/