A display system includes an HMD mounted on a head of a user, and a control device coupled to the HMD, the HMD includes an image display unit, with an outside scene being visible, for displaying a display image overlapping the outside scene, and a main control unit for causing an image display unit to display a display image, and the control device includes a touch panel, and a CO control unit for causing a related image related to a display content of the display image to be displayed on the touch panel.