Will you use a separate OOC thread? If yes, small groups. If no, solos.
This sounds like something played in the modern world without supernatural additions, so Human, not Exotic.
Nobody seems to be doing anything against their will, so it's not for the NC boards (feel free to correct me if I misunderstood your story intentions).
That leaves Light, Bondage or Extreme, depending on what kind of advise you have in plan for your customers