The Building for all Freshman Students. It has a fairly basic set up for the most part, containing various stores for students to use, such as the Rosen Queen. It also has a dimensional gate which can allow quick access to other parts of the school. The Freshmen Building acts as the game's main Hub Area.
The Sophomore Building is very bizarre as it appears to more like a battlefield from feudal Japan rather than a school. It also appears to be outdoors but because the sky in Sophomore Building is in permanent Twilight and the rest of the Academy is in permanent Night this seems quite impossible.
The Senior Building is the most bizarre building in the school due to the fact that it flies. The interior is also strange as it is completely distorted and out of order, making it difficult to tell up from down (being somewhat Escheresque).