Renovation cases were carried out with their existing structure and foundation. In this case, the building is located at a road intersection. We used round wrapped pillars to change the employee entrance in order to segment the entrances of the office area and conference area. As for the external walls, special paint with fair-faced concrete texture was continued to present a harmonious dialogue between white & gray and roughness & neatness. Green lawn added liveliness to the gray streets while wide French windows were installed to introduce light into the room.