A virtual reality system 1 includes a display unit 13 that displays a video 100, a control unit 21 that controls a change of the video 100 displayed on the display unit 13, an origin position setting unit 14 that sets an origin position X, a current position recognition unit 15 that detects and recognizes a current position Y of a user U, and a progress direction setting unit 16 that calculates a direction of the current position Y recognized by the current position recognition unit 15 with respect to the origin position X set by the origin position setting unit 14, and sets a progress direction in the displayed video 100 in accordance with the direction, and the control unit 21 controls a change of the video 100 to cause the video 100 to progress in a progress direction set by the progress direction setting unit 16.