Content distribution systems for displaying a virtual space to user terminals, content distribution methods executed by a content distribution system including at least one processor, and non-transitory computer-readable media storing a content distribution program are disclosed. An example system according to the disclosure includes at least one processor that detects when an avatar corresponding to a first user performs a predetermined action in a virtual space, and displays a content image of the virtual space on a user terminal of a second user among the plurality of user terminals. The predetermined action is invisible in the content image when the processor detects that the avatar performs the predetermined action.