JAV titles with actress strapped to wall?

[Martincylo]

Saw a couple of Jav clips on vid tubes where the actress are strapped a wall like stand with just their butts exposed. Usually it’s 2 gals in “competition” with the winner taking extra attention at the end.
I’ve been searching for titles to no avail. Are they part of a series?

Thanks for help in advance.

Marty

 

[Martincylo]

I can elaborate a bit, the best one I saw had a tanned girl like aka and other. They were both sitting on a hole to fit their butt with arms chain on the other side. Both these wall segments were wheeled out on display in something like a gentleman's club show.
Here's an example..
http://asianbeautytube.com/glory-hole/?viewkey=h3fr0uyk2Lh