My first properly written fantasy was on this theme, when I was at High School, involving a couple of the most fanciable girls in school (and a male friend who I brought in in Chapter Three to even the odds). It was all nominally consensual BDSM, but with whoever was on top going way beyond what the current bottoms had agreed to, thus giving them the excuse to go equally too far when it was their turn. It worked up from bondage and spanking to elaborate torture and slavery before I ran out of ideas.

For a shorter tables-turned fantasy, where the bottoms don't take over for long, see http://www.mcstories.com/OneTrueSlave/OneTrueSlave.html