pencil and story: Toshiki Yui

The volume is mainly divided into two distinct stories.
The first, which gives the volume its title, tells the story of Ana and her younger brother Aki.
Ana became her father's lover and then started making hardcore movies.
Aki has discovered her sister's movies and can't resist the desire to masturbate while watching them.
Ana finds out and has sex with him.
After high school Aki often visits her at home to have sex, but Ana can't give up on the relationship with her father.
A former hard movies colleague of her is added to the menage, who in turn is having an affair with a boy and his sister!
In the second story, more interesting in my opinion, the protagonist is tormented by the ghost of a boy who died a virgin.
Thanks to his willpower he manages to possess the girl, making her a sex addict.
Two sisters try to exorcise the ghost, but only succeed in making him possess the body of another girl.
The two girls meet and have sex, until the ghost is satisfied and leaves the ground floor.