I believe this was a collaboration item from quite a while ago between Kirinyan-san and a handmade artist. Worn example in image 4 (different color). Unused and stored in a cool, dark place. There is yellowing on the adhesive due to aging (image 3). How about using it as a prop for taking photos with male underground idols or singers? Black is also sold on a separate page. Collar choker, choker, handmade, cute, cosplay, "jigoku" (aesthetics), mass production type