pencil and story: Toshiki Yui

A demon visits Earth and asks two girls (Kanomi and Mariko) to have sex together.
When he warns them that he has two penises, they accept.
Mika and Yuka, their friends, are immediately added to the two.
Kanomi and Mariko are actually trans, so there are enough genders for everyone!
In short, other girls and boys (all characters who have already appeared in the regular series) arrive in Mariko's house, unleashing an orgy.
The fun is interrupted by the demon's wife, who summons a flood of demons to the party for revenge.
Among them also her father, the King of Demons, who immediately gets excited at the sight of so many beautiful human beings.
The orgy ends only with the arrival of his gigantic bride, the Queen.