Suijou Gakuen Toshi Rikka (水上学園都市 六花), more commonly known as Asterisk (アスタリスク), is the primary setting of the Gakusen Toshi Asterisk series.
Asterisk is a well kept city on an artificial island, located on top of a crater lake in northern Kanto. The name Asterisk comes from the bird's eye view of the city, which resembles a hexagon. The city is very large, boasting both underground chambers and large buildings on top, as well as numerous ballast chambers to keep it afloat.
The main section of Asterisk is divided into the Central Ward (中央区) and the Outer Residential Area (外縁居住区). The Central Ward is split into two halves with the Commerce Area (商業エリア) on one side and the Administrative Area (行政エリア) on the other.
There is a hotel known as Hotel Elnath (ホテル・エルナト) where the monthly Rikka Garden Conference is held on the top floor. It is located in the area in between the two areas. In addition, the Sirius Dome (シリウスドーム), the largest arena within Asterisk, is located in the same area at the center of the island.
However, there are dangerous areas in the city as well, primarily including the Redevelopment Area (再開発エリア) and the Rotlicht (歓楽街) on the edge of the Redevelopment Area.
The police department of Asterisk is known as the Stjarnagarm. They only have jurisdiction over the central area of Asterisk as the schools are under their own jurisdiction. They may only enter schools grounds during extreme situations or if they have permission to do so.
- Seidoukan Academy
- Saint Galahadworth Academy
- Jie Long Seventh Institute
- Arlequint Academy
- Rewolf Black Institute
- Queenvail Girls' Academy
- Hotel Elnath
- Sirius Dome
- Stjarnagarm Headquarters
- Redevelopment Area