Takahashi Mirai discovered her parents' pornographic magazines in the third grade and secretly began masturbating, awakening to the hidden pleasure. Her sexual desires grew intensely, engaging in sex about ten times a week, sometimes even four times a day. What excites her most is being toyed with until completely exhausted, then immediately penetrated. Solo play can come on suddenly—once started, she won't stop, sometimes going nonstop for two to three hours. Her peak arousal comes when fantasizing about being secretly filmed, molested, or raped during masturbation.
Meanwhile, Hashida Asuka began touching herself as early as she can remember, her behavior escalating to the point of requiring visits to a neurologist. During cleaning time at elementary school, she would pretend to knock on desks while grinding against the corner. Fascinated by girls' bodily functions, she frequently spied on toilets, and since she was only allowed to use staff restrooms, her curiosity intensified further. By middle school, she began faking trips to the bathroom and instead masturbated in the hallways during class. Enjoying "to-bikko" (a pelvic thrusting game) as a hobby, she constantly pleasures herself while walking, even at shopping malls. During high school, while working part-time at an izakaya, all the male staff except the manager were handsome and highly virile, so during every break she performed blowjobs in the back room, savoring the distinct taste of each man's sperm. Her libido remains constantly high, especially aroused when warmth—like from a heater—touches her crotch. She indulges in this sensation every winter ride on the train.