Set in a near-future version of Japan, the games tell the story of a martial arts tournament created to determine the country’s strongest woman. The tournaments are sponsored by a number of family restaurants, who in exchange for their sponsorship, are given promotion in the form of having a tournament entry work as a waitress. As a result of the popularity of the tournaments, the restaurants experience a boom in patronage.
The winner of the tournament is awarded the title “Virgin Goddess”, as well as a large cash prize of ten billion yen, and a house erected anywhere on the planet they should choose. However, when a given waitress is defeated, they are required to publicly strip themselves of their clothing (self-fondling and public masturbation may be forced upon the loser, and in the most extreme cases, the loser is raped/gang-raped, either in private or in front of an audience), in order to teach the so-called “true” shame of defeat. In spite of such humiliation, the tournaments often draw many competitors, each placing their pride and their dreams on the line as they battle for the top.