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A European research group has announced that there is no G-spot. He insists that the erogenous zone of the female genitalia is not limited to one place like the G-spot, but is more complex, and proposes the concept of the erogenous zone as "clitoris urethral-vaginal complex = CUV complex". A new project to let you experience such a CUV! The subject was Yui Hatano, also known as Hatano of Sekai. Having developed all kinds of erogenous zones, she enters a super-pleasant unexperienced zone!