Kuro Ai: Hitoyozumakan Inkou Rannyuuroku / Dark Love

Tetsuya's study in a luxury hotel becomes a haven for the Yakuza and a strange cult dedicated to orgies. On luxurious silk sheets and soft velvet chairs, rich and powerful people engage in sexual excesses so depraved that even watching them can turn an ordinary person into a monster.

But the true purpose of this cult is to make a deal with evil spirits who can literally turn Tetsui into a demon...