1. A communication support system comprising: a receiving unit configured to receive, via a network, a captured image obtained in another location; a display unit configured to display the captured image received by the receiving unit; a cropping unit configured, in a case where the display unit superposes and displays a reference image as an upper layer over the captured image, to crop an image of an area having the reference image arranged therein out of the captured image; a specifying unit configured to specify a person area corresponding to a person within a cropped image obtained by the cropping unit; and a processing unit configured to make an area that is different from the person area specified by the specifying unit transparent in the cropped image, wherein the display unit displays an output image obtained by superposing the reference image as an upper layer over the captured image and further superposing the cropped image processed by the processing unit as an upper layer over the reference image.