The chair (Pixiv Fanbox)

What an incredible tool to assert dominance! ~ Trainees stuck inside the chair practically can’t help themselves being little submissive pets~ The trainees are placed lying down on their backs within the chair, with only their head and soles sticking out. Inside the chair are vibrating elements, that turn anyone stuck inside into mindless victims of their pleasure. The master or trainer then sits atop the chair like a throne, playing with the trainee’s feet while having their own feet worshipped by the trainee~ What a comfortable device to use!