First, at least a player object and a non-player object are placed in a virtual three-dimensional space. Next, the player object is moved based on an input from predetermined operation means. Subsequently, current position data is obtained which indicates the current position, in the virtual three-dimensional space, of the player object which has been moved. Based on the current position data, the orientation of the non-player object is controlled such that a predetermined plane of the non-player object faces the current position of the player object.