a world that has reached its end... everything is covered in ash. however, fortunately, taro manages to escape to a shelter, where 10 women have already evacuated, and taro is welcomed as the only male survivor. then, some of the women lure taro, who has the only male organ, and demand sexual intercourse. taro's incredible stamina quickly spreads throughout the shelter, and a strong reproductive instinct chains the women together. seeking seeds, taro has sex with the women every day. the days of rosary bead sex, exploiting semen in a dreamlike communal life, begin...