I have just discovered a wiki named "Bondage arena" that describes a role-play system for fighting and binding your opponent. I made a test drive with an experienced player and it was excellent.
Bondage Arena was an original concept developed by Aelie, finding a way to play a competitive dice game with a kinky twist. It rapidly developed due to multiple player's input, expanding from a d10 game to d20 to give more dice possibilities, and eventually reached its current state. It remains a work in progress, continuing to be shared with various players for new ideas and playtesting.You can find that wiki here:
http://arena.t15.orgI would love to explore this system in more depth. If you are interested, please contact me.