On a small island town isolated within the flow of worlds, two schools wage a constant war to produce the ultimate weapon. A self-sustaining system, the town creates NPCs to populate its buildings and run its facilities, but looks outside itself, into the chaos of the multiverse, for its raw materials. Rakuen draws its population indiscriminately from every conceivable world with intelligent humanoid inhabitants, and some without. Shuttled in via train every weekend, their powers sealed within themselves in the form of spiritual weapons, characters awaken with little memory of the journey or their reasons for enrolling in one of the two schools - though, inevitably, they can recall agreeing to do so if they strain themselves.
Rakuen seals many things to draw out its inhabitants' true potential. The first is their abilities. The second is fragments of their memories and personality, which they must earn back by participating in the tournaments and skirmishes of the system known as Exaclan.
Exaclan, as anyone can find out with a few well-placed questions, is a virtual battle system layered over Rakuen that allows warriors to fight indefinitely without inflicting real damage - only the pain of the blows remains. To operate Exaclan, the system of Rakuen selects a number of its inhabitants to be the active warriors, the operators - or, as they are known in colloquial terms, the Players - and relegates the remaining majority to be their passive supply of Weapons, whose role is to serve and obey their particular Player. Players use a glove keyed into the virtual programming to draw a virtual facsimile of these passive characters' inner weapon, which they use to battle.
In RP terms, Rakuen Revolution is a reasonably small, medium-paced battle school game with memory loss and power alteration elements. It requires a basic monthly activity check. It is organised to optimise CR whilst allowing for player-run plots and schemes within a larger framework. While it doesn't have an active plot, there is an overarching target (the endgame) at which all characters can aim, and miniplots are held fortnightly with the potential for crack or alternate plots should players wish to trigger them.