The existing stairs and interior decoration have resulted in narrow circulation between the front and back areas, while the original staggered floor structure has divided the space into different zones. We redesigned the stair structure to adjust the circulation direction, creating new circulation routes to shape the form and structure of the front and back spaces. In the partition design, we aimed to preserve privacy while allowing some light and visual permeability to enhance spatial transparency. Natural light was utilized to emphasize the spatial dimensionality, and the treatment of the floor and wall paint was used to strengthen the spatial sense. Additionally, we created blurred linear openings in the corridor design to fill the interior corridors with light and provide guidance, aiming to overcome the limitations of the narrow layout as much as possible.