An image forming device includes a printer engine, a display unit, and a sound reproducing unit. The image forming device receives a list of contents from a content distributing device, and has the display unit display the content list. From the content list displayed by the display unit, a user of the image forming device selects a print content, a display content, and a sound content that he desires, associates the selected contents with one another to produce a group of the selected contents, and requests the content distributing device to distribute the group of the selected contents. The content distributing device produces the group of contents associated with one another, and distributes the group of contents to the image forming device. The image forming device expands the print content in the distributed content group into print data, and has the printer engine print the print data. In synchronization with printing of the print data, the display unit displays the display content associated with the print content, and the sound reproducing unit reproduces the sound content.