After having her name publicly changed to “Bitch”, Myne had thought her punishment was over. But Naofumi had one or two more things in store for her. He wanted some time to talk to her, as well as inflict some pain of his own. But she’s always got something to say, so he decided he’d show her the DeepGag: a double-pronged gag bolted onto the wall, and stretches into her mouth from either side, going deep down her throat. She can’t close her mouth, move her head, or really move her body at all until her hands are freed!
The character is Myne, from the anime Shield Hero.