Fight in the Sex Arena!

From the introduction: Queen Erishella, Holder of the Skull Throne, Conqueror of the Gem Worlds, Tyrant of Known Space and Destroyer of Democracies has announced a Grand Celebration for her personal amusement! Glory to the Queen! In addition to the usual orgies, sensual executions of traitors and musical performances, Queen Erishella will gather together sixty-four sexual athletes from the far reaches of her kingdom for a Tournament of Fuck-Fighters! Glory to the Queen!