After disbanding the trio, entertainer Kenichi was working part-time at a cleaning company. On the other hand, Nami, who was Kenichi's ex-girlfriend, formed a new combination with Yusuke and was working hard at training, but her material was boring and she relied on Kenichi. Meanwhile, Kenichi and Kazuyo naturally have a physical relationship, but she finds out that Kazuyo was actually the wife of the late Kantaro Namiki, whom Kenichi admired.
Natsuo, a young man who remains a virgin even before the age of 25 due to his natural weakness and reaction to his sexually uninhibited mother, Saeko. He continues to fall in love with his childhood friend Nana (Ren Fukusaki), but she is the type of woman who has a lot of sex experience like Saeko, so Natsuo hesitates. Natsuo's biological father, Narahashi, who has been watching over Natsuo from the shadows, prepares something to teach him about love. It was an android love doll Angela (Saki Okuda) that he developed. Angela uses her superhuman computing power and SEX skills to bring Natsuo and Nana closer together, but at the same time, a faint "something" begins to emerge within her...
Izumi Yasuura, who came to a port town, started working at a snack run by Mako. Izumi's mild personality and cute appearance make him a popular figure among florist Shoichi and regular customers. One evening, Izumi meets Mikio, who plays a folk guitar alone at the foot of the bridge. Eventually they fell in love and started living together. However, a few years later, Mikio transformed into a thug and became a string of springs ...
The Slit-Mouthed Woman is a striking example of Pink Cinema that mixes horror with eroticism in a way that is both unsettling and genuinely original. A young couple enter a hospital after rumours that a demonic spirit known as the slit mouthed woman had been seen there. Once inside, they are possessed by an overwhelming desire to have sex and sneak off into an empty room to satiate their lusts. Then out of the darkness a perverse and disfigured woman appears and confronts them.The Slit-Mouthed Woman, a.k.a Kuchisake, is an original hybrid of pink erotica and horror from the controversial J-sploitation director Takuaki Hashiguchi whose previous films include the disturbingly nasty Woman Prisoner Torture. The Slit-Mouthed Woman features impressive special make-up effects from Takashi Oda, who worked alongside the acclaimed actor/director Beat Takeshi Kitano on his Yakuza action film Sonatine.