A housing project housewife whose husband is away on a work assignment gets taken advantage of when a man enters her home and immediately penetrates her. She passionately grinds her hips, releasing pent-up desires from her single life, screaming in ecstasy repeatedly as she orgasms. The adult social circle she joined was actually a sex research group, and through her experiences there, her attitude toward sex completely transformed. Now awakened to pleasure, she eagerly laps at older men's anuses. Forced to perform blowjob, wide-open M-shaped blowjob, rimming, and handjob, she cries out "It feels so good!" in both missionary and doggy style. The shocking encounter culminates in a facial cumshot while lying face-to-face.