Stationary pillory

Intended to strengthen the stationary restraint version of pillory with a bent over pose. Base illustrious however cannot deal with the from-behind pose, so I improved that by using doujin sources. It is still not completely reliable, you can try increasing the weight to make it more consistent. The from behind angle also tends to generate a wall, possibly due to the flat doujin sources, so I recommend prompting something more specific for the background.