An aligning unit stores a paper bundle that is formed by inserting a medium that is different from printed body text paper sheets conveyed from a printer into the printed body text paper sheets. A manual paper feeding unit stores a medium that is manually fed. A conveyance control unit makes the medium be conveyed from the manual paper feeding unit to the aligning unit after the body text paper sheets that include a page specified by a print job are stored in the aligning unit and before the body text paper sheet conveyed from the printer immediately afterwards is stored in the aligning unit.