at least one processor configured to:

form a periphery image, which is a synthetic image showing a region of a periphery of the vehicle viewed from an arbitrary virtual view point, by using a plurality of camera images captured by a plurality of cameras configured to photograph the periphery of the vehicle;

execute processing to display, on a display, the periphery image;

form a vehicle-inside view point image, which is the periphery image showing a periphery of the vehicle viewed from a vehicle-inside view point positioned inside a vehicle room in such a way as to transparently pass through a portion or an entirety of the vehicle;

form an interior-added image, which is a synthetic image including an image of an interior member viewed from the vehicle-inside view point, by using data, which is for drawing an image of the interior member and stored in a predetermined storage medium;

when changing over a display screen to the vehicle-inside view point image in response to a user's manipulation on the vehicle, before displaying the vehicle-inside view point image, display an animation that stepwisely moves a position of the virtual view point from a start view point, which is set at a predetermined position outside the vehicle room, to the vehicle-inside view point as a target view point and thereafter to gradually raise the transparency of the image of the interior member; and

start processing to gradually raise the transparency of the image of the interior member and to perform an animation expression to display an image of a tire as non-transparent, which is equal to or more than a predetermined threshold value, after elapse of a predetermined time period since start of rendering the interior member transparent, after the virtual view point has reached the vehicle-inside view point as the target view point.