Furniture Design Overlap Sofa by Tomoki Doi Introducing a sofa created by overlapping two components. While fulfilling its functionality, this sofa presents an object-like look that transforms its impression with every angle of view. The backrest and seat are off-axis and laid out to form a flat surface, thereby creating a variety of usages and arrangements. When several units are placed side by side, the backrest and the seating surface merge into a single element, blending into one.