A hitman takes one last job in the hope that its successful completion will free him from his previous life and allow him to start over with his new lover. However, a mistake he made during a previous assignment comes back to haunt him.

Natsumi, a female college student attending a university in Tokyo, lives in a luxury apartment left to her by her parents and leads a carefree life. However, her older sister Keiko moves into Natsumi's room after her brother-in-law dies in an accident. Natsumi, who is quite promiscuous, is no longer able to have the sex she loves because of her sister...

Shozo and Miyo are intertwined. With her sister Chiyo's approval, Miyo spends half of each week living with Chiyo's husband, Shozo. Meanwhile, Shozo's friend Satoru, who has a crush on Chiyo, an actress, comes to tell her he is leaving for Africa, a place he has always dreamed of visiting, and they part ways. However, Chiyo sees Satoru still in Japan...

Naoya Imai and Kohei Murakami live with a mysterious, beautiful girl named Neko. The cat's lower body is a "lucky charm." Not only does it bring them dazzling pleasure during sex with the two men, it also brings them extraordinary good fortune. However, as Naoya and Kohei each begin to desire to monopolize Neko, a rift begins to form in the strange life of the three of them...

A man who was once divorced due to a lack of sex remarried, but now has a much older wife. To avoid another sexless marriage after his previous mistake, the couple try out various cosplays and creative situations, enjoying their married life to avoid any sense of staleness. However, the couple's sexual exploration begins to get out of control, and before long it develops into a big commotion that involves everyone around them...