Abstract: A system includes a first acquisition unit adapted to acquire a first position/orientation of a first viewpoint of a first observer, a first manipulation unit used by the first observer to manipulate a virtual object, and a second manipulation unit used by a second observer to manipulate the virtual object. A generation unit generates an image of the virtual object viewed from the first viewpoint based on the first position/orientation, and generates an image of the second manipulation unit based on a relative position of the second manipulation unit from a second viewpoint position of the second observer, a second acquisition unit acquires an image of a physical space viewed from the first viewpoint, and a combining unit combines the images generated by the generation unit and the image acquired by the second acquisition unit.