性器の大実験　発電しびれ腰

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Kaisei (Azuma Rin), who calls herself the "Masturbation Meister", is conducting a new research project to generate electricity from the energy produced by ecstasy and solve the problem of power shortage. She will measure the difference in the amount of electricity generated by men and women while masturbating...

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Genital experiment: power generation numb waist · Seiki no dai jikken: Hatsuden shibire koshi · 性器の大実験　発電しびれ腰