Setting the calm mood which the low chroma tones such as gray and white possess as the main theme of the mansion, uses gray special paint as the base of the TV wall, grids from far to near to bring out the curved lines and extends to the facade of cabinets having a complete volumetric function, and utilizes upright lines and cabinets. The turnings of the curved grille extend the visual mood through the consistent color tone. Applying for lacquered white woodwork and inlaid with gray mirrors on the wall of the dining room, and introverted characters of gray color on the mirror surface.