This LJ comm represents the town of Goldkrone, a world of Princess Tutu AU characters rendered as its own RPG. Goldkrone Stadt is German for Gold Crown Town, which is a hopefully obvious reference to the original material. :P
This RPG starts in the middle of its plotline; to read the backstory of the characters, check out schuchternprinz's profile for a good (but not comprehensive) overview. However, if you're interested, more in-depth backstory discussion can be found at the OOC comm.