“How about something like this for her?”
Nishiko spoke as if she was demonstrating a TV shopping experience, and picked up Saki's pair of socks and a bundle of duct tape.
She then forced one of them into Yoko's mouth, placed the other one over her nose, and wrapped tape above and below it, securing it completely.
"Ggf..... Mmgh...!"
Yoko coughed perhaps due to the disgust.

“I don’t think she really understands it, but I would be unpleasant if it happened to me…Umh..”
Nishiko said so as she remembered something.
"Okay, leave this person alone and let's start with the third one! Hehe, use this..."
What Nishiko picked up from the desk was...
the athletic shoes that Yumi was wearing.
-To be continued.