Joskium is a former colony on a planet far from earth. It has become a hub for people from different dimensions. Joskium grew more advanced over the years and discovered interdimensional travel and created an Interdimensional gate. Residents of Joskium are from earth or from a different dimension. Joskium is now ruled by a monarchy. The current ruler is kept in secret and access to the "Castle" is heavily restricted.
(Hentai is allowed, no rape.)