Communication system for remote communication

A communication system, comprising:

• a first site and a second site,
• the first site at least arranging:
• a first projection unit configured to project a first image on a first screen;
• a first control unit configured to control a position on which the first projection unit projects an image;
• and
• a first image obtain unit configured to obtain an image of a user situated to face a display surface of the first screen,
• the second site at least arranging:
• a second projection unit configured to project the first image and a second image on a second screen, the second image being a mirror image based on image data of a user obtained by the first image obtain unit;
• a second control unit configured to control a position on which the second projection unit projects an image;
• and
• a detection unit configured to detect an instruction from a user,
• wherein the second control unit (1) obtains a direction and an amount of movement of the first image in a case where the detection unit detects an instruction to move a display position of the first image projected on the second screen and (2) controls to move the second image projected by the second projection unit according to the obtained direction and the amount of movement and
• wherein the first control unit controls not to move the first image projected on the first screen if the display position of the first image projected on the second screen is moved.