Turn your favorite characters into professional chiropractors!

Relevant tags:
clsdgrp: aggressor has the hands on victims head.

opngrp: aggressor has the hands splayed out like they had just twisted the victims head.

straddling/standing/crouching/sitting on person: changes the posture.

from front/from side/from back/from above: changes the view.

femdom (girl being the aggressor)/maledom(untested)/ryona(girl being the victim)

This was a challenging concept to train, so you may have to experiment with the tags to get what you want out of it.