Namanaka Hyaku Percent! Katamusubi no Shinpa(2012)

生膣ひゃくぱぁせんと！ 固結びのシンパ くぱぁ

Shinpa, the practice of having on one's person a shoelace which color signifies his or her preferred sexual fetish. In this way also is one able to search out his/her ideal partner.