Perhaps the Reborn Download Page/Title Menu disclaimer thing should give info that the game is based on what happened on the Reborn League. Or at least give some kind of tribute for the dying character...
I wasn't part of the league, but I'm nearly sure this was roleplay. And I doubt Ame would have turned all those events into a game if it was real, to me it would just feel wrong. I hope I'm right, for these people's sake.