Parking assist systems, methods, and programs may take a peripheral image of a vehicle; and may display the peripheral image on a display. The systems, methods, and programs may recognize a parking area and may display a first predicted locus line on the display, the first predicted locus line extending up to a predetermined distance from the vehicle and being superimposed on the peripheral image. The systems, methods, and programs may change the display of the first predicted locus line in accordance with a steering angle of a steering wheel. The systems, methods, and programs may display a second predicted locus line superimposed on the peripheral image, the second predicted locus line extending up to the recognized parking area and being displayed on an extension line of the first predicted locus line and may change the display of the second predicted locus line in accordance with the steering angle of the steering wheel.