Even blindfolded, Yui could feel Ryuki looking at her thoughtfully. She wondered what he was going to do.
Then she heard him go into the bathroom and come back. A drawer opened and shut.
"Yui, prepare for this," He said and suddenly Yui felt a wadded-up washcloth being forced into her mouth. A "shhhroook" of tape being pulled off a roll followed, and she felt the tape being plastered over her mouth to hold the washcloth in, plus a second strip for good measure.
Yui felt her pussy cleanched as she become unable to speak.
"Oh, yes," Ryuki said with smile. "Those tits should be all nicely un-numb by now. I'd better give you these back." Yui heard a rattle as he took the nipple clamps out of his pocket, then felt them bite down again on her still-tender black buds.