"It can't be cut or untied. It's just a tangle of fibers continuously rearranging itself to hold fast. Not only does it bind my hands behind me. It makes me overheat if I wear anything between thighs and shoulders, but it does keep me warm even outside in this place."

"The sonic screwdriver is useless against this thing. Where did you get it?"

"I went on a mission to learn about the mysterious Bunny Girls. They were extremely friendly and... Well, to make a long story short, I let them tie me up with this. I thought its regenerating would weaken over time after returning here, but it's as strong as ever."