'MASS' is an apartment house in the city.
In a big city, it is difficult to communicate with neighbors, especially in a large capacity apartment block, which may cause a cold atmosphere. For instance, the dwellers do not know who are their neighbors then there may happen crimes. However, in this apartment block, the inhabitant can get a sense of solidarity from the design, like the shape of the building or the material used in corridors. It'll be a trigger establishing relationships with neighbors.