Balancing act (Pixiv Fanbox)

Keeping your balance on a slippery steel ball is difficult already, having to do it with your hands tied behind your back while wearing high heels is near impossible. To give the trainees a little help in maintaining their posture, we rigged various piercings across their bodies with cables. Losing their balance means either falling off the ball or having a large dildo, which is conveniently placed between their legs, slide all the way inside them~