Osamu Sato

The Miyoshi family is currently living apart from the father, who is on a solo overseas assignment in Thailand. Their son, Tsubaki, is enjoying juggling relationships with two different women. Then, one day, his twin sister Sakura—who had been studying in the United States—decides to return home for a visit, bringing along her foreign boyfriend. Their mother, Reiko, finds herself fantasizing about having sex with a white man...

Izumi, an office worker, arranges to meet Hasegawa—a friend from her university days—and brings along Momoko, a divorced colleague. Momoko and Hasegawa hit it off immediately and enter into a whirlwind marriage. Though surprised, Izumi offers them her blessings. A few months later, strange incidents begin to plague Momoko, who has left her job to become a full-time homemaker...

Riko inherited "Sakura-yu," a public bathhouse run by her late husband's family, after he died of a heart attack during sex. However, the business was saddled with massive debt, and the few remaining regulars were exasperated by the lewd behavior of Kentaro, a law school hopeful who manned the front desk. A welcome party for Riko was held in Kentaro's room, attended by regular customer Soda, Miho (an escort), and Shiori (an office worker); Kentaro fell for Riko at first sight. One day, a man named Origuchi—the spitting image of her late husband—showed up at the bathhouse. A salesman of adult toys, he boasted of a massive member that dwarfed even a vibrator. Origuchi asked the widowed Riko out on a date.

Maho, a sales manager at an adult goods workshop, is once again cracking the whip at the development team, where progress on a new product has been painfully slow. While the staff generally find the uptight Maho a nuisance and avoid her, the masochistic department head, Sawano, actually delights in listening to her scolding. However, during a test run of a new vibrator, a sudden incident causes Maho to transform into a nymphomaniac! The affected team members become fired up to develop the new product, but...

Mai, an aspiring writer of pure romance novels, became an apprentice to Rokujūrō Kuwahata—a titan of the erotic fiction world—at the urging of her publisher. Whenever Rokujūrō hit a wall with his writing, he would prey upon his editors to get his pen moving again. Although he had originally written pure romance, he switched to erotic fiction after being sued for sexual harassment by a female assistant; he now vented the resulting frustration on his editors. Mai soon found herself falling victim to Rokujūrō’s predatory behavior...

The Miyoshi family is a three-generation household. The grandfather, Senkichi, is incredibly virile for his age. His son, Sugio, on the other hand, is a serious man who is completely devoted to his work. Even when his wife, Reiko asks for sex, he only says he's tired. The couple has twin siblings, Sakura and Tsubaki, who are high school students. Sakura is like her serious father and does well in school. On the other hand, her younger brother, Tsubaki, has inherited his grandfather's traits and is more interested in women than studying. He brings home Natsumi, a female college student he met at a telephone dating service, and spends his days having sex. One day in the afternoon, Senkichi, looking for an outlet for his sexual desires, ends up having sex with Reiko, who is sexually frustrated...

Mariko, a housewife has become addicted to dating sites. Ayu, a high school girl, is forced into compensated dating and is embraced by a man who is the same age as her father. S&M dominatrix Jose, has a child, but she leaves him behind and suffers from loneliness... What answers do these three women desperately seek in order to survive?