In FC2-PPV-4968239, instead of the usual suction cup type, I'm using a screw-type nipple sucker for the first time in a while. The suction power is stronger than the usual one, and it doesn't come off no matter how much I pull or twist it. Visually, this one really gives the feeling that "the nipples are stretching," doesn't it? This time I tried rubber bands plus binding, and as expected, it's powerful.