One's Factory's popular series centered on schoolgirls welcomes renowned actress Mao Hamasaki! Friends visiting Mao's house discover her parents are away and seize the opportunity to take her by force, using underhanded methods to make her their own. They indulge in various sexual acts they once fantasized about, now carried out in reality on Mao's body. As relentless humiliation continues without end, the schoolgirl is completely turned into a slave. Gang rape, training, enslavement—72 hours of intense abuse transform her into a mere sex slave.