"Welcome, Hinagiku."At first glance she looks like a plain Jane, but Hinagiku Kuroko is actually hot and sexy as hell. She has feelings for Otonashi Suguru, who works at the library with her, but he has feelings for the idol of the school, Moegi. In a string of events, Kuroko ends up confessing to him while he's blindfolded, but her voice is similar to Moegi's.From that day on, she rapes Suguru everyday while pretending to be Moegi.

Wakana and her much older husband attend a funeral. That night, she has a visit with Takashi - a younger man studying for his college entrance exams.

A cruise with only guests invited by a famous company and staff allowed on.This cruise, the Northern Light, is celebrating it's 200th voyage, with Fujigasaki Miho's father as the captain.Miho is invited by her best friend, Moribe Jun, to work there part time.Otowa Saki, a student working at the cruise's restaurant, playing the violin.Kurusu Nonoka, an idol holding a handshake event on the main deck.Fujigasaki Miho and Moribe Jun, who are working at the casino as waiteresses.And Mizunashi Nadia, a dealer at the casino.We'll have lots of fun, and it'll be a great memory of how we spent our summer vacation...That's what Miho thought, before she realized the nightmare that was waiting for them.

It's a new century and men have lost their sexual desires thus decreasing the number of marriages and births. In order to repopulate the world, the government decided to start a program to improve men's sex lives. Sex idols, girls who can sing, dance, and have sex with innumerable men, are now in need to help improve the stagnant society.