The rules for combat dictate that battles must be between two participants with at least one non-participating witness present, and end when one combatant either dies or allows their back to touch the ground. The winner takes the loser's tags and is free to do as they please to the loser after that, often consisting of rape and resulting in the loser's death; however, many of the participants wantonly break the rules of the game. Two executioners, Gunji and Kiriwar, work for Arbitro, patrolling Toshima to kill rule breakers and to clean up the corpses of the fallen; however, they view themselves above the rules and often kill participants at their whims without consequences.