A high-achieving big-titted female college student takes on a vibrator challenge: she'll earn 1 million yen if she doesn't cum. Driven by an insatiably horny curiosity, Nene Tanaka, a science major researching battery technology for grad school, puts her skills to a different kind of test. A graduate of a prestigious university that's produced Nobel laureates, she boasts an academic deviation score—and an erotic deviation score—of over 70. Her plain jeans-and-T-shirt look contrasts sharply with her wet lips and soft, bouncy body. It's said the smarter they are, the hornier they get, and Nene happily admits her favorite pastime is sucking thick, long cocks and making noise. When offered a chance to test a massager, she eagerly agrees, citing muscle tension from lab work. Excited about the vibrator, she pants, "I get a million yen if I don't cum, right?" Her nipples are rolled with a pole vibrator, then she's put on all fours and twitching violently under relentless stimulation, quickly giving in to orgasm. Stuffed with a thick cock, she's pounded in missionary position with deep, successive creampie loads, making her cum repeatedly. Bound upright, she's assaulted again with the electric massager—her horny body never tires, screaming, "I'm cumming!" Her legs tremble, drenched in gushing waves of girl-cum. Between intense blowjobs, she's hit with clit sucking and fingering, driving her into blissful ruin. Doggystyle and reverse cowgirl make her H-cup breasts sway wildly. Used like a fleshlight, she's fucked over and over. Finally, thick, milky cum is blasted all over her pretty face. Her review of the vibrator? "I didn't think I'd like it that much—but now I love it." Nene, passionate about both research and sex, was one hell of a high-capacity battery (lol).