A printing system includes an image forming device and an information processing device configured to transmit print data containing a plurality of pages of images to the image forming device and control the image forming device to print the images on sheets based on the print data. The information processing device includes a first transmitter configured to sequentially transmit, to the image forming device, print data of each of a main page and one or more ancillary pages to be printed in connection with the main page, and a second transmitter configured to transmit, to the image forming device, booking information regarding a number of the ancillary pages in association with transmission of the print data of the main page.